This guy is one of the most knowledgeable folks out there, when it comes to TTs. Seriously, an everlasting source of precious information, tips and technical wisdom. Thank you for always helping me out! Subscribing is a must for anyone who's driving these cars!!
@@dariocheese9240 .... and psychic, apparently. This video dropped exactly at the time my 1.8T started giving me overheat issues! Awesome timing. This video is a big help.
Thanks man really appreciate the kind words, I’m just trying to help others enjoy these cars as without us tinkering the old cars just become too expensive to keep on the road which is a shame 😘
@@michelelazzari644 that always seems to be the way, some of it is helped by the fact that I watch the Facebook group/forum and get ideas from there and also my personal TT it’s a great help for video ideas too ha ha
Good advice, mate. I'm beginning to think that the best advice to new owners is to spend 2 years and £8k carefully restoring every single aspect of the car. They would then have an "as new" car, that will never let them down, but it will still only be worth £3k. :-)
As funny as your comment is, it is crazy accurate, that or spend two years searching for someone who has spent 8K who is then willing to sell it for three 😂😂. Thanks as always dude
@@TheParrottBros Don't you guys think that as more of these cars end up being chopped for spares for precisely that reason, in 10 yrs, they'll be more rare and worth more? Will we hold on to them that long? Will the design and allure of the car endure? Who knows. Maybe Parrot Bros will start doing videos on how to convert your TT to electric?
Thank you brother! I’m having cooling fan issues on my A4 B7 and I really appreciate the breakdown of how everything works. I’m confident I will be able to diagnose my problem now!
Very useful vid Dom, yet again! My cooling system packed up on second trip in car! it was a fan and thermostat failure. This will certainly help me keep an eye on system. thank you sir.
Great timing especially with the ultra gauge comparison. Just replaced my original after run pump as it was just seeping under pressure. Still have work to do so this video will be very helpful. 👍
Glad it will be put to good use, yeah often they get forgotten about as they’re out the way and if you don’t hear them running you wouldn’t question if you did not know it was there 😂
It was as if I knew 😂👀. Only kidding, I’m sure there is a few people who have been nursing them for awhile as didn’t know what to do,/where to look as this is quite a common grey area
@@TheParrottBros My TT has been sitting, my ol man parked it after melting the fuse in the box above the battery. The primary fan isn't spinning well either. I have just picked up a new to me module and working on replacing the fan and fuse block. I'm going to hit the Aux pump as well for good measure now that I know. Maybe you did know or you hear the voices in the void calling out in need lol! Either way doing great, keep up the videos! Kudos from across the pond.
Thank you! , you saved me some time and money, my problem was a faulty fuse on the fuse box that fixed the problem now ac compressor and fans are working 💪
I already removed the air con and really thinking about removing the fan control module to remove a lot of shitty wires and run the fans the simplest way with relay and temp switch, just trying to figure it out the best way to do it.. nice video bro!
Thanks buddy, yeah I too contemplated that but love my a/c too much, if I had a roadster it would be a different story for sure 😂. Feel free to drop me an email fandwe can discuss wiring if you need a hand
Thanks for the information, car was overheating in traffic, turns out it was just a burnt out fuse on top of the battery ( fuse had actually melted) New 30 amp fuse & fans burst into life. Once again great video.👍
Thank you so much for the needed reset of mind. My a/c hose is not 100% secured, thus having a slight leak. I know the relay work, but no ac. Really appreciate your efforts.
Iv watch hours of TH-cam videos and surfed the internet for a lot of hours and his is a cracking video best I’ve seen and his detail I explaining each parts is amazing and because of this mans. I solved my fans have never worked and I was lucky I didn’t blow the head gasket the length of time Iv ran the car and a 3.0 v6 engine blown ahead isn’t cheap!thank you n keep making these videos cos I appreciate them 👍👍
thanks buddy, thats a nice simple fix, its annoying it doesnt flag a code or anything on the dash, so unless you have diag software you wouldnt know ( except no a/c if you live somewhere hot ) haha
Thank you for making this video it really help me solve the problem of my fans not turning on , mine had a contact issue on my fuse box on top of the battery
In my epic research too find my fault, I came across this gold nugget. You can pull out fuse 16, to force the slow run fans to kick off. If those work you can eliminate that circuit of the fan controller module. Today I finally got the TT back up and running after 3 months off the road. The bloody thing has done a full Christine (1983 film) on me Haha! The TT fixed its self. 😑 Thanks heaps for helping.
Thank you for posting such a complete and comprehensive guide. The timing was perfect for me - my ‘01 Roadster just started running hot due to fan antics. Thanks for keeping the MK1 TT alive!!!
Thanks for posting this very informative video, exactly at a time I needed all this information for dealing with this problem first hand. Shot, Parrot Bros! Always willing to help ...you rock.
Good timing. I didn’t think I had problems but apparently I do. After run pump doesn’t come on all the time and I see that the right fan never turns on either. Left fan( under the after run pump turns on but I guess the car didn’t get warm enough for high speed to kick in. I guess I need to start looking for part numbers.
At least you caught it before it is a real problem, just think how hard a little fan is having to work compare to the other one that should be on at the same time
My low speed fans come on at about 99°c, and shut off anything below 99. Drives normal but, Are they supposed to stay running even after you shut the car off? I hear my aux water pump, but my coolant keeps getting dumped out my reserve tank when parked and no fans. Driving me crazy. I've watched you video a million times. Good stuff.
Your videos are brilliant mate 👍 helps with my s3 8l a lot. My fans dont come on at all. The car has never went over 90 on the dash. Even with a bit of heavy footed driving. At a bit of a loss
I had this problem about 5 months ago. I remember going nuts solving this issue, eventually, I found the issue and repaired it. But I wish this video was around to clarify some things.... Great video though!
Thanks buddy, yeah that’s what’s I wanted the video to do was point people on the right direction, show what needs testing and possible symptoms. Often it can cause bigger problems if goes unnoticed
Hey Alan, good spot, will definatley save issues further down the line, i dont im afraid, its not something ive filmed. Its quite fiddly to do, usually easier if you remoce the front bumper then loosen the slam panel/ rad pack and allow it to come forward to give you extra room to work
I overheated badly on A30.. towed in and turned out module controlling fans packed up so not turning on. They sorted that out but still running too hot. That turned out to be stupid plastic impeller in the water pump disintegrated!! Got an aftermarket one with metal impeller and was cheaper than the recommended one
Unfortunately sometimes it can be the smallest thing that goes causing the biggest problem, I have seen it many times where aftermarket parts have been fitted or parts that have maybe not been made correctly fail, and you look around thinking it’s got to be something else when really is the part you think I wouldn’t fail. And sometimes you replace one faulty part think you’re okay and there’s more than one problem 😂😂 Sounds like you’ve got it all sorted now though 👌🏻
@@TheParrottBros I was lucky, as to be honest I was giving it some, a little 'friendly fun' with a fellow driver 😉.. there's no layby on the A30 there so had to drive over a mile down the road with the red lights flashing and temp gauge at the top.. stil, head gasket survived and no issues since (was 2 years ago) 🤞
@@TheParrottBros it's the Audi pump that has the crappy plastic impellers! I'd advise anyone replacing water pump to buy one one with metal impellers, cheaper too! By the way, when's the subscribers car vid going up, really hoping I'm in it! 🤞😉
Great video and information, THANK YOU! I’ve been following your troubleshooting steps and using a jumper wire at the thermal switch connector I’m able to get one fan (right side) to run high & low speed. I would think both fans should be running? Is there a good way to test the left side fan? Thanks again!
Yes, both fans should run together both speeds. Check the wiring to both fans as on separate plugs as you may have a power issue. Failing that the fan may be seized or motor failed
@@TheParrottBros Thanks for the reply Mr Parrott. I see there are 3 wires for each fan, I would guess that one is ground, one is low speed and one is high speed?
Just a follow up, I found the that the larger fan would not power up at slow or high speed. Removed the fan from the car and removed the back cover on the fan motor. Found one of the motor brushes was stuck in the holder. I freed up the brush, cleaned the commutator & reassembled. Working great. Thanks for the great videos and resources 👍
Having another look tomorrow. The 49 code jobbie and the temp needle seem to be working together but still temp warning lights on. Both fans work with air con on. I'm I missing something??? Must watch vid again. Lol thanks again keep up the good work. 👊
@@TheParrottBros changed temp sensor. But before that on the way home it disappeared and comes on straight away when you turn the ignition on it there waving at you. Will have to get it apart see what the crack is cheers 👊
My car has been overheating, and even when I turn on the air conditioning, the fans don't spin at any speed. I turn off the car, then turn it back on, and the fans start working again. I've replaced the fuse box above the battery, 2 temperature sensors, the thermostat, the radiator thermo-switch, fuse box over battery and the relay box under the battery, but the same issue persists. Sometimes the fans work fine at both speeds, and other times they don't work at all. If I bridge the connector on the thermo-switch, both speeds work, at least when I tried. Any help? Thank you very much.
Thanks for a really comprehensive video. Really handy. CAn you give any more detail on the running of the fan control module? I’ve been told the relay that switches on/off the magnetic clutch on the aircon compressor is contained in the unit. At what stage does it switch on during the aircon startup? Reason being my compressor clutch is not being engaged and I’m not seeing any difference (in terms of voltage) to the compressor even if the aircon is on. My car has a failed slow speed fan on the larger of the 2 fans (right hand fan nearest the battery) which I will replace but the left smaller fan (furthest from the battery) does spin at the slower speed shortly after the aircon is switched on… but I’m not seeing the compressor clutch engage. What are the steps the car goes thru to start the AC? Is there a way to test the ac high pressure switch to confirm there is enough pressure in the system to switch the compressor on… Where is he AC high pressure switch and what role does the FCM take in the AC startup? Are there any other modules to check as part of the AC startup/running steps? Thanks again for your video. It’s helped me lots.
My radiator fun slow dont work when temp go after 90 , only when i open ac , ive send it to mechanic he did check it , first it thought might be head gasket but after he saw it he told me he fix the control module (centralina ) , all fuses works ok he said but i did a test 20km with ac on. 5 min , after i stoped i saw the fund didnt work again and the car lost water , what it could be ? Please help
The slow speed doesn’t usually come on until 95 or above, they are. Controlled by a thermal switch which is mounted in the radiator. This could well be faulty. It shouldn’t be losing water, you could have a number of issues causing that but I would suggest looking at 1 thing at a time.
@@TheParrottBros i was all day to mechanic , he saw the water cable for leak . Didnt saw any , check all fuses and they seemt to be ok , when he open the centraline under was 2 cable unpluget , when i pluget those the car fun start to work in full speed but the car was cold , he fixed the centralina and now they dont do that again only when i turn ac on , but the water keeps droping half a litter for 20 km , we dont see ant leak in radiator or pipes , where does it lost the water ? What could it be . in 20 km drive should the fun start working the sliw speed ?
Hello, my first fan speed always starts at 100 degrees, the temperature needle goes up when the car is idling, it goes up a little and then goes down quickly when it reaches 100 degrees. But if the car is completely stopped it doesn't start the first time. speed to cool down the car after driving with it
Theoretically if there is no power at the permanent of the thermal switch, and the fuse has been replaced has it got to be the main brain part not working ?
Hey great channel. Ok I have a mk1 tt 225. Had the car 2 weeks. The car sits at 90 degrees on the Dash and the coolant digital temp on the climate control unit was sitting around 80 when I stopped the car. I let the car idle for 5-10 mins and the genk gage on the Dash was still at 90 by tje fans were not kicking in as I would have expected. Then when I switched the car off there was no secondary fan or pump running as you have mentioned. I will check the fuse/s on the car later. Ans try and work back to the fault.
So the gauge will sit at 90 solid when its 80-100 on the climate gauge as its a weighted gauge, thats totally normal, if you turn the air con on do the fans run? and the pump on the radiator should run from the moment you turn the key on until almost 10 mins after you turn the car off
I own an 05 Audi A4 B6 1.8T. My fans turn on at a cold start and wont let my car warm up. I’ve replaced the 219 relay already but it was from a parts car. What else could it be. There was water in the ecm box but i noticed the car had this problem when i bought it before the box flooded
The fan on my 03 A4 doesn’t work anymore not even AC fan and I tried to run it with VCDS via output test and it still didn’t work, I tried to jump start it with a test lead on the connector for FCM and still didn’t work am I clear to understand that the FCM is bad?
I deleted my Aircon system out and am using a aux belt from a a3 non ac. Now I have noticed the the low speed isn't working. Is there a way to close the the circuit to allow the low speed to be working as if the ac is still on the car an working ??? Or is there a way to put a manual switch for the low speed. It seems to be working from testing at the radiator sensor. But I have no ac motor or piping left in the engine bay 🤔
i've changed fan control module and temp giver and fans work fine now but clima doesnt cool. I've heard about some part behind the glove box that can be the issue but not sure what that part is
There should be a sensor that measures how hot the air is in the blower cabin, looks a bit like a metal hedgehog, I’ll get a part number and send it over for you to have a look
Yeah that part has failed on mine. You can tell by the grayish foam which comes out from the air vents when the ac is running. There are two flaps which control the hot/cold airflow and that foam is the insulator. When it’s gone, the flaps don’t seal properly causing the issue. But I have to say, mine’s busted for about a year now and all I had to do was refill the ac freon. I live in a Mediterranean country and now it’s cold af in my cabin during the summer time.
@@dimitrist3561 yeah i notices some sponge/foam pieces in the vent, i went to refill freon first when ac stoped but they told me its full and just added some oil for lubrication iirc. do you know part number for that flap i think thats my issue
@@77garga I couldn't find it, but take a look at the following article for a better understanding of the issue www.audiworld.com/forums/tt-mk1-discussion-9/c-blowing-detached-foam-insulation-system-into-car-1948972/
I’ve replaced literally all of these, and I still have to use the a/c to make my fans come on. The only thing I can think of is that maybe the brand of the thermoswitch I bought doesn’t cooperate with the car. Also I don’t have an after run pump. 02 180 5 speed Q
Sounds like you may have a faulty part, you could also have a broken wire etc. the thermo switch can be tested my using either heat or hot water to see if it changes state
Got Audi A4 2.0l just got a problem of the fan and overheating will try that issue of aircorn. I did change aircorn compressor and no gas on it Thanks And wht could be the problem if boot is not being open? Sometimes it opens especially when it's cold when it's hot they is sun 🌞 doesn't open? Please help
Hi I have VW golf GTD to turbo recently just got the AC topped up temperature gauge read Dentist to check fuse box his fans was not working fuse as blown change the fuse fan started working fuse blown again no fans do not work and fuse keeps blowing even with the ECU off
Likely issue, fan has failed / gone short inside and is causing fuse to blow, that or a sensor has gone short, or you have a wiring issue. unplug one fan and replace the fuse, see what happens if blows plug back in and unplug other fan, easiest way to rule that out
Idk if you’ll be able to answer but I have an 08 Audi a4 and my heater hose broke and I replaced it and re added the coolant but when I turn on the heat(which blows super hot air) no fans come on, but when I turn on the ac, the fans come on
Hey bro ur videos are class... I've had my tt for 5 years and think it's the dogs balls but yesterday I was pulling away to and lost all power... My mechanic I know ish had a look yesterday and reckons my water pump seized on and it's jump timing but not snapped... Its a 225 and she's so clean and looked after what should I do and damage do u reckon is there .. Any help would be brilliant
Hey firstly thanks for the kind words, secondly sorry to hear that happened, not usually good news, it depends did it stop the engine dead? make any horrible noises? usually can cause bent valves worst case
Many thanks on the reply if anyone's gonna no its you.... Yea stopped completely dead at around 1500rpm... Its booked in this week for the head to come off to see 🤞... If u have a spare 225 bam engine would happily buy... Thanks again for knowledge buddy
Mine isn’t overheating my issue is after every single journey my cooling fan is coming on for a couple minutes- it’s not loud but it’s there and it’s really annoying 😢plenty of coolant and can’t see any leaks but I see at end of video you say this is normal as some people tell me it’s not? But it does come on after every drive- it’s 2.0 TDI
Brilliantly informative video. Just subscribed! Have I missed it? What I have a A/C pump clutch not pulling in, but if put 12v the connector, it works OK. Is there a separate relay or is it controlled by the fan control module?
Just working through these issues this week. Check this out.... large fan not working, ONLY small fan would engage (with A/C on or when coolant reached temperature threshold). Jumped the thermal switch, had both high and low speeds on both fans (conclusion bad thermal switch). A/C wouldn't blow cold. A/C compressor was only getting 9.5v...but was I was getting 12v entering the FCM. Swapped out the FCM (knockoff) - result was NEITHER large or small fan would run BUT I did had 12v at the compressor. Applied 12v directly (bypassing FCM) to the A/C compressor, clutch engaged (freon level was fine and small fan was running) but would not build high pressure in the system (conclusion- bad compressor.....and bad FCM). Was driving myself crazy trying think this was only one issue......all wiring/fuses were fine no corrosion or signs of overheating ......you must have been feeling my pain and decided to make this video....hahaha.
That’s probably the most annoying part of fault finding issues. New parts that you can’t always rule out. Even though it’s new and should work fine 😂. Top work for persevering through
Hey sorry for bother you if I buy the air flow Sensor I’m Supposed to take it to dealership to program to the ecu or I can just connected the new one plz if u have a chance let me know and the temperature gauge it goes really high and that’s when the fans kick out when the gauge is really high any Ideas because I know you’re really good working on Audis TT
@@victormagana1641 Sounds like you are presenting multiple issues that are not related to one another. Have you had the car scanned with VAG software? If not, this should be the first step. Did you get a code for the MAF sensor? If so, it's a straight forward swap. The fans cutting out when hot is very odd and can be caused by multiple issues. Check all the connections at the fuse box on top of the battery. If BOTH fans are cutting out, I would suspect a FCM or a Temperature Control Switch, but you should check voltage at the fans when they cut out. Voltage at the fans would point to the fans being bad. No voltage to the fans would point to an issue further up the electrical circuit.
@@victormagana1641 you can fit a new maf and providing it works and is not faulty it won’t need any programming etc. You may need to get a code reader and clear the fault codes. But you can just take battery off for 10 mins. Does same
Hey, thanks for the video, it's was very informative! I was wondering of you disconnect the Coolant temp sensor, does it bring the fans on? I understand this works with most other cars. Ty bud!
Hi all, I am cutting and pasting this from a recent FB post to get some opinions, maybe even from the man himself, anyway... here goes... when the temp reads 95/96 (via 49c) the drivers side fan kicks in for a little a bit and then shuts off again it does this periodically when the vehicle is stationary which is what I would expect and deem this to be normal behavior. The left or passenger side fan I would assume is the AC fan ? It isn't coming on at any point even if I have the temp set to LO and Auto, the air coming out of the vents isn't cold, that is one issue. The second issue is that when driving the temp drops from 90 to 70-75 very quickly and stays there until I become stationary again at which point it will creep back up to 90 over a few minutes and eventually to 95 and turn the driver side fan on. This doesn't seem like a faulty sensor but more like a faulty thermostat which is staying open and letting the air cooled coolant continuously circulate when driving. We don't see this behaviour when stationary as it can control shutting the fan on and off, obviously the air flow can't be shut off when the vehicle is moving hence the continuously low temp. That's my logic anyway...
2007 8p ac stuck in Econ and fans not running in either speed even when car is plenty hot on 95f degree day. Are the fans the reason the AC isn’t working. Also after parking car battery is dead in about 30 min. Thanks for the video.
Unsure as thats a different model, its the fans may have failed and its causing the ac to not work but without testing you wont know, worth getting checked and replacing if need be as you dont want your car overheating
@@TheParrottBros checked all the easy stuff but no luck. Possibly needs ac recharged but not sure if that effects fans. Also noticed the battery won’t hold a charge so car has to be jumped every time. Can a bad battery cause issues with ac system and radiator fans? Thanks
My Audi A8 Quattro 1999 is over heating and when I look at the two fans I see by the radiator, one fan that is connected to the belt and there is one electric fan that isn’t kicking on at all no matter the temp of the car. I watched your video all good info. Where should I check first thanks in advance
Not particularly fluent with a8’s buddy but I would check the supply to the fan and see if there’s power there or not. There’s a good possibility that you have a knackered fan or there is no supply maybe due to a failed fuse etc
I have an engine warning light and the bigger fan doesn't seem to cut in but the smaller one cuts in with AC. Fuses all look fine. Sounds like the big fan needs to be replaced, is there anything else that is likely to be wrong to cause the light?
I've taken all of the engine bay air con components out. My passenger side fan is constantly pulsing on n off at high speed and the drivers side running at low speed, both as soon as I start the engine. Any ideas how to cure this please?
Such a well timed video, my temperature has just started playing up, going to around 108 in traffic. I've noticed that with the Aircon on the both fans are spinning for about 30 seconds then both stop for another 30 then they cut back in again....also noticed that the overrun doesn't appear to be working :(
Thank you for the 10 messages 😂. Foam in vents is from the air vents them selves. The foam is out round each joint to help seal the system. Over the years this gets heat damaged and falls off.
@@TheParrottBros Yes your right. I alway's thought it would just come on when some condition was met, but I guess I was wrong. I alway's make sure to cool my car down after pushing hard though, that already makes a big difference in turbo/manifold life.
@@m0rb1d43 Yeah i usually have a route i take home after giving it a good warm up haha, this just helps to gradually cool them down and for what they cost are worth having
Great video, very informative. My fans are currently not spinning (this is a mk1 Leon 1.8T, not a TT but figured this is basically the same). I've already replaced pretty much all of this stuff and they still do not work. Stuff replaced with new parts: -both fans -switch in the radiator -temp sensor on the side of the engine -module underneath battery -fuses on top of battery are all okay Have tried to connect the fans directly as described and then both speeds do work. Temperature on the dash goes up to 90 normally and car does not overheat (so far). All this is with ignoring the A/C (this car has the older knobs, not the climate control so there is no "econ") as there seems to be some damage to the condenser so this system is currently not in use. Any ideas what else I can try/check? Unfortunately I'm a beginner and have exhausted my limited knowledge/experience haha
If your car isn’t going past 95 then your fans won’t need to come on as there is no reason for them to. You can leave it sat there on idle and eventually the car should creep past 95 degrees and they should kick in but besides that I wouldn’t worry if your not seeing over heating issues. It’s easy to be come worried about this issue. I’m bad for it 😂
@@TheParrottBros Hm I see, thanks a lot for your response! This is my first VAG car (got it as a project for learning) so everything has been new to me. Many people say both fans should turn on when turning on the AC but since that isn't working, that hasn't been an option to check haha. Thanks again, I'll stop worrying about it.
Informative video! Just a quick one, when I turn my ignition on.. car hasn't been run at all. I hear the fans burst into life and running full pelt. Is this normal?
If your air con is on then it could well be, turn your climate control off completely if the fans still start up you could have an issue with the fan control module
When I turn the AC on, the smaller fan runs, the car overheats and neither fan comes on and also after turning the car off the fans don't run. If I spin the primary larger fan, it will spin for 30 seconds and then stop. I purchased a new cooling fan assembly, but I'm not sure if that is it.
It sounds like you have more than one problem, both fans should spin when ever the fans come on, if they are not coming on with the vehicle gets hot there is a good possibility that the thermal switch in the radiator has also failed
Dom and company..I have a question about the aux water pump. I just replaced it but it doesn’t stop running now. I was looking this up and it could be my older battery in the car, or the FMC has gone bad? I’m pretty new at this but I definitely knew the aux pump was going out. In fact it fell apart when taking it out, lol. I have to keep the new pump unplugged until I find out what is causing it to run constantly (and after 10 min). Any thoughts on this??
This is very interesting, have you let it run for more than 15 minutes to see if it does turn off? It could be a broken relay in the circuit, I would have to check my drawings,
@@TheParrottBros yeah it doesn’t shut down. And heater finally lost heat, so I’m getting the heater core and coolant system flushed. Hoses are gummy from years of improper coolant. So maybe boil down to temp sensors or something else. I did read on the TTforum that a new battery in fact, solved their issue. A weak battery wasn’t enough to keep the relay happy.
Thank you for your helpful video. Please could you tell me if the fans are supposed to run after the engine has been turned off. I have checked the after run pump and I can hear it working.
My fans run with the aircon so guessing they're ok. Fans are not cutting in but the consul temp is lower than the dash temp higher up the range. Would a thermostat be on your list?
Both the dashboard cluster and the heater controls measure the temperature from the same place, the temp sensor on the passenger side of the engine. If your fans are not coming on when the car gets hot and the Aircon is off it is likely that the thermal switch in your radiator is failing or failed, this can be proved by removing it and then sorting out the two pins and see if the fans come on if they do then is the switch if they do not then he could be the control unit underneath the battery
Hi, I tough I have an overheating issue, because the car was standing with running engine. I've tested the fresh replaced thermostat. I also checked 49C during the test, but started to overheat and I stopped the engine at 101°C, because the fans didn't turn on. After this video I realized, that ECON was ON. LOL. Thanks for that info! :) Anyhow, I'm wondering what if ECON is ON and I don't check it. Can it boil the water without turning the fans on?
My power steering pressure switch was damaged I noticed when I was trying to find the fault with my fans. Replaced the ps switch tonight and now my fans are working
I having bit of a,issue temp when driving. Normal. 88 to 92c. . Idleing. Temp goes up to 110c and back down again up and down then i get a little coolant leak. Near driver side wheel..
It sounds like your fans are not kicking in, you need to have a look at the thermal switch in your radiator as that should bring your fans on slow speed above 95 and fast speed above 103
Great video! I wonder if you could help me solve my 2003 1.8T VW Golf overheating problem. It's driving me crazy. When I get stuck in a long traffic jam it starts overheating. I think the fans high speed is not working at that point. Fortunately I get the temperature back to 90º quickly from 110 ºC by connecting AC. Thermostat and pump seems to be fine as pipes from thermostat (lower) and from radiator (top) get very hot both, and it keeps 90º in normal driving. I´ve checked both fans turn on (low speed) by themself at iddle and temperature stays at 90º, I also triggered the fans manually bridging the radiator thermo-switch connector. Both fans work in low and high speed. What's the faulty component responsible for this, green temperature sensor, fan control module, fuses? Thank you for your time helping us.
Slightly the opposite to the issues you explained here but I was wondering if you could help? My tt simply won't get to temperature! Confirmed with 49c trick, thermostat and temp sender changed. Can't seem to get above 77 degrees even sat in traffic 😫
Both Fans work for me when AC is on but fans not working when A/C is off. Low fan speed doesn't come on by itself. Will the radiator switch that I cross turn the low speed fan on show that it's just that radiator sensor that is bad if I know that both fans run when A/C is on? Thanks for this video I love my mk1 tt.
On the Radiator plug below battery. I checked my plug for voltage and only one of the two/three configurations is showing 12 V voltage on the Three Socket Plug on the Harness. The other Two configs on the connector sockets show Open (.02 ohms). I did a Jumper as well in both configurations on the Harness connection and only One way works by firing up both fans with the A/C On or Off. The Module is New and the heat sensor plugs are newer.
Yeah you can hear it. It’s not loud but it’s obvious. You can also test it by starting your car leave it running on idle and open your bonnet and feel the pump. It should be running
@@TheParrottBros I've just tested the fan switch plug. Jumping the low speed pin and there is nothing. Jumping the high speed pin and they work. Does this point towards the resistors in the fans being at fault?
Hi, my a.c works well and gets cold, however the low speed fan does not work. How can I test if the low speed is working? And if it does work what would I check? Thanks
Thanks for the information, wanted to know whilst on the move I noticed that if I turn off climate control system I feel warm air flowing in from the footwells or just under dash. I'm gathering this is not normal.. any advice would be much appreciated. Thank you
That could well be normal as even when off a small amount of air will flow through the vents, try when its on changing it to air vents on dash then turn it off and see if air comes through them instead
Very good video and very thorough. However my problem is that my fans are working with ac on however they dont work when ac off any solution to this ? What should i look for ?
That will likely be your thermal switch in radiator. Unplug it snd bridge it out and see if your fans come on, if they do then your switch in the radiator is faulty. Very common
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This guy is one of the most knowledgeable folks out there, when it comes to TTs. Seriously, an everlasting source of precious information, tips and technical wisdom. Thank you for always helping me out! Subscribing is a must for anyone who's driving these cars!!
The dudes a machine on the tt shows you everything
@@dariocheese9240 .... and psychic, apparently. This video dropped exactly at the time my 1.8T started giving me overheat issues! Awesome timing. This video is a big help.
Thanks man really appreciate the kind words, I’m just trying to help others enjoy these cars as without us tinkering the old cars just become too expensive to keep on the road which is a shame 😘
@@dariocheese9240 thanks man means a lot 😎
@@michelelazzari644 that always seems to be the way, some of it is helped by the fact that I watch the Facebook group/forum and get ideas from there and also my personal TT it’s a great help for video ideas too ha ha
Good vid Green temp sensor can show correct temp on clocks but car won't start when hot . Sensor used for cold start up and fuel trim by E.C.M.
Thanks for that ian! appreciate it
Good advice, mate. I'm beginning to think that the best advice to new owners is to spend 2 years and £8k carefully restoring every single aspect of the car. They would then have an "as new" car, that will never let them down, but it will still only be worth £3k. :-)
As funny as your comment is, it is crazy accurate, that or spend two years searching for someone who has spent 8K who is then willing to sell it for three 😂😂. Thanks as always dude
@@TheParrottBros "No such thing as a free lunch" springs to mind, my friend. :-)
@@TheParrottBros Don't you guys think that as more of these cars end up being chopped for spares for precisely that reason, in 10 yrs, they'll be more rare and worth more? Will we hold on to them that long? Will the design and allure of the car endure? Who knows. Maybe Parrot Bros will start doing videos on how to convert your TT to electric?
Thank you brother! I’m having cooling fan issues on my A4 B7 and I really appreciate the breakdown of how everything works. I’m confident I will be able to diagnose my problem now!
Glad it’s been of good help mate
Very useful vid Dom, yet again! My cooling system packed up on second trip in car! it was a fan and thermostat failure. This will certainly help me keep an eye on system. thank you sir.
Great timing especially with the ultra gauge comparison. Just replaced my original after run pump as it was just seeping under pressure. Still have work to do so this video will be very helpful. 👍
Glad it will be put to good use, yeah often they get forgotten about as they’re out the way and if you don’t hear them running you wouldn’t question if you did not know it was there 😂
Perfect timing for me!
It was as if I knew 😂👀.
Only kidding, I’m sure there is a few people who have been nursing them for awhile as didn’t know what to do,/where to look as this is quite a common grey area
@@TheParrottBros My TT has been sitting, my ol man parked it after melting the fuse in the box above the battery. The primary fan isn't spinning well either. I have just picked up a new to me module and working on replacing the fan and fuse block.
I'm going to hit the Aux pump as well for good measure now that I know.
Maybe you did know or you hear the voices in the void calling out in need lol! Either way doing great, keep up the videos! Kudos from across the pond.
Not all tts have secundaire electric pump mate
@@TheParrottBros Starting to think the problem is more pervasive, than you being psychic! LOL
@@camo8752 that’s right, sorry should have stayed. It’s 225’s only
"They both should be working. If one runs and not the other, it has failed ".
Thanks!
following you from Spain since 2 years ago, best man doing the job in tt´s. All my questions are solved with you. Hope my tt will run again someday
Thanks for the kind words mate 😎. Hope you get it back on the road and enjoy it
Thank you! , you saved me some time and money, my problem was a faulty fuse on the fuse box that fixed the problem now ac compressor and fans are working 💪
Happy days! Glad the videos being put to
Good use
I already removed the air con and really thinking about removing the fan control module to remove a lot of shitty wires and run the fans the simplest way with relay and temp switch, just trying to figure it out the best way to do it.. nice video bro!
Thanks buddy, yeah I too contemplated that but love my a/c too much, if I had a roadster it would be a different story for sure 😂. Feel free to drop me an email fandwe can discuss wiring if you need a hand
Usefull video dom i heard my fans come on other day when stuck in traffic so all is good.
Thanks for the information, car was overheating in traffic, turns out it was just a burnt out fuse on top of the battery ( fuse had actually melted) New 30 amp fuse & fans burst into life. Once again great video.👍
Right so if that’s the case check if the slow speed is working or not as usually when a fuse blows or burns is due to being over loaded
Thank you so much for the needed reset of mind. My a/c hose is not 100% secured, thus having a slight leak. I know the relay work, but no ac. Really appreciate your efforts.
Iv watch hours of TH-cam videos and surfed the internet for a lot of hours and his is a cracking video best I’ve seen and his detail I explaining each parts is amazing and because of this mans. I solved my fans have never worked and I was lucky I didn’t blow the head gasket the length of time Iv ran the car and a 3.0 v6 engine blown ahead isn’t cheap!thank you n keep making these videos cos I appreciate them 👍👍
Thats brilliant, glad the video has been of help and got the car sorted, thats always been the aim of the channel
Great video, i had problem with my AC last year and the pressure switch (G65) was broken. But after change and refill the fluid all worked fine again
thanks buddy, thats a nice simple fix, its annoying it doesnt flag a code or anything on the dash, so unless you have diag software you wouldnt know ( except no a/c if you live somewhere hot ) haha
Thank you for making this video it really help me solve the problem of my fans not turning on , mine had a contact issue on my fuse box on top of the battery
Brilliant, glad its still being put to good use :)
Your vids have put my tt back on the road. Thank you bud
Awesome, glad they are still getting put to good use
In my epic research too find my fault, I came across this gold nugget.
You can pull out fuse 16, to force the slow run fans to kick off.
If those work you can eliminate that circuit of the fan controller module.
Today I finally got the TT back up and running after 3 months off the road.
The bloody thing has done a full Christine (1983 film) on me
Haha!
The TT fixed its self. 😑
Thanks heaps for helping.
Thank you for posting such a complete and comprehensive guide. The timing was perfect for me - my ‘01 Roadster just started running hot due to fan antics. Thanks for keeping the MK1 TT alive!!!
Brilliant, that’s what my plan was. Glad it’s getting put to good use
Brother Great Video! My TT fans don't work, but now I believe I can fix them after watching your Video! Thank you Joe C.
Thanks for posting this very informative video, exactly at a time I needed all this information for dealing with this problem first hand. Shot, Parrot Bros! Always willing to help ...you rock.
Good timing. I didn’t think I had problems but apparently I do. After run pump doesn’t come on all the time and I see that the right fan never turns on either. Left fan( under the after run pump turns on but I guess the car didn’t get warm enough for high speed to kick in. I guess I need to start looking for part numbers.
At least you caught it before it is a real problem, just think how hard a little fan is having to work compare to the other one that should be on at the same time
It may be faulty hehehe... 🤪😂😂😂 Love it
😅
My low speed fans come on at about 99°c, and shut off anything below 99. Drives normal but, Are they supposed to stay running even after you shut the car off? I hear my aux water pump, but my coolant keeps getting dumped out my reserve tank when parked and no fans. Driving me crazy. I've watched you video a million times. Good stuff.
Your videos are brilliant mate 👍 helps with my s3 8l a lot. My fans dont come on at all. The car has never went over 90 on the dash. Even with a bit of heavy footed driving. At a bit of a loss
You may just have a well flowing car mate, I wouldn’t worry too much if you’ve never had any issues
Absolutely fantastic video! You’ve gained a sub and like and I don’t even have a TT or Audi but VAG is VAG. Well done, really helpful.
thank you appreciate the comment
Cracking video dude, that’s going into the save list so I can work my way through sorting out all the issues on my ‘beloved’ TT 😂😂
😂😂 May not need it now but who knows what the future holds, TT life after all 😂
I had this problem about 5 months ago. I remember going nuts solving this issue, eventually, I found the issue and repaired it. But I wish this video was around to clarify some things.... Great video though!
Thanks buddy, yeah that’s what’s I wanted the video to do was point people on the right direction, show what needs testing and possible symptoms. Often it can cause bigger problems if goes unnoticed
I just purchased an '02 TT 225. Large fan not working. All fuses OK. Do you have video for R&Ring the fan?
Hey Alan, good spot, will definatley save issues further down the line, i dont im afraid, its not something ive filmed. Its quite fiddly to do, usually easier if you remoce the front bumper then loosen the slam panel/ rad pack and allow it to come forward to give you extra room to work
I don't think the 180bhp has an overrun pump on it,correct me if I'm wrong
You are correct mate, only the 225 has a afterrun pump
Sometimes the air conditioner may not start because the outside air sensor temperature is missing or not working )
Thanks alot mate, i have the big fan stuck and need to replace
Glad I’m able to help, bit of a fiddly job but will be well worth it
Nice one Dom, another informative video.
Thanks buddy 😁
I overheated badly on A30.. towed in and turned out module controlling fans packed up so not turning on. They sorted that out but still running too hot. That turned out to be stupid plastic impeller in the water pump disintegrated!! Got an aftermarket one with metal impeller and was cheaper than the recommended one
Unfortunately sometimes it can be the smallest thing that goes causing the biggest problem, I have seen it many times where aftermarket parts have been fitted or parts that have maybe not been made correctly fail, and you look around thinking it’s got to be something else when really is the part you think I wouldn’t fail. And sometimes you replace one faulty part think you’re okay and there’s more than one problem 😂😂
Sounds like you’ve got it all sorted now though 👌🏻
@@TheParrottBros I was lucky, as to be honest I was giving it some, a little 'friendly fun' with a fellow driver 😉.. there's no layby on the A30 there so had to drive over a mile down the road with the red lights flashing and temp gauge at the top.. stil, head gasket survived and no issues since (was 2 years ago) 🤞
@@blakkno666 Sounds like you got very lucky if thats the case!! always nice to hear a good story rather than a bad one haha
@@TheParrottBros it's the Audi pump that has the crappy plastic impellers! I'd advise anyone replacing water pump to buy one one with metal impellers, cheaper too!
By the way, when's the subscribers car vid going up, really hoping I'm in it! 🤞😉
@@blakkno666 it should be going live this Sunday mate 👀
Great video and information, THANK YOU!
I’ve been following your troubleshooting steps and using a jumper wire at the thermal switch connector I’m able to get one fan (right side) to run high & low speed. I would think both fans should be running? Is there a good way to test the left side fan?
Thanks again!
Yes, both fans should run together both speeds.
Check the wiring to both fans as on separate plugs as you may have a power issue. Failing that the fan may be seized or motor failed
@@TheParrottBros Thanks for the reply Mr Parrott. I see there are 3 wires for each fan, I would guess that one is ground, one is low speed and one is high speed?
Just a follow up, I found the that the larger fan would not power up at slow or high speed. Removed the fan from the car and removed the back cover on the fan motor. Found one of the motor brushes was stuck in the holder. I freed up the brush, cleaned the commutator & reassembled. Working great. Thanks for the great videos and resources 👍
Another great vid big man. And just in time as my temp warning light things cropped up yesterday lol. 👊
Hope you get it sorted with the help of this video 👌🏻
Having another look tomorrow. The 49 code jobbie and the temp needle seem to be working together but still temp warning lights on. Both fans work with air con on. I'm I missing something??? Must watch vid again. Lol thanks again keep up the good work. 👊
@@adamdrayton3100 you could have a failed water pump so it’s not circulating the water, the temp sensor could be faulty etc
@@TheParrottBros changed temp sensor. But before that on the way home it disappeared and comes on straight away when you turn the ignition on it there waving at you. Will have to get it apart see what the crack is cheers 👊
My car has been overheating, and even when I turn on the air conditioning, the fans don't spin at any speed. I turn off the car, then turn it back on, and the fans start working again. I've replaced the fuse box above the battery, 2 temperature sensors, the thermostat, the radiator thermo-switch, fuse box over battery and the relay box under the battery, but the same issue persists. Sometimes the fans work fine at both speeds, and other times they don't work at all.
If I bridge the connector on the thermo-switch, both speeds work, at least when I tried.
Any help?
Thank you very much.
Thanks for a really comprehensive video. Really handy.
CAn you give any more detail on the running of the fan control module? I’ve been told the relay that switches on/off the magnetic clutch on the aircon compressor is contained in the unit. At what stage does it switch on during the aircon startup?
Reason being my compressor clutch is not being engaged and I’m not seeing any difference (in terms of voltage) to the compressor even if the aircon is on. My car has a failed slow speed fan on the larger of the 2 fans (right hand fan nearest the battery) which I will replace but the left smaller fan (furthest from the battery) does spin at the slower speed shortly after the aircon is switched on… but I’m not seeing the compressor clutch engage. What are the steps the car goes thru to start the AC? Is there a way to test the ac high pressure switch to confirm there is enough pressure in the system to switch the compressor on…
Where is he AC high pressure switch and what role does the FCM take in the AC startup? Are there any other modules to check as part of the AC startup/running steps?
Thanks again for your video. It’s helped me lots.
thanks for your video, containing so much useful info
My radiator fun slow dont work when temp go after 90 , only when i open ac , ive send it to mechanic he did check it , first it thought might be head gasket but after he saw it he told me he fix the control module (centralina ) , all fuses works ok he said but i did a test 20km with ac on. 5 min , after i stoped i saw the fund didnt work again and the car lost water , what it could be ? Please help
The slow speed doesn’t usually come on until 95 or above, they are. Controlled by a thermal switch which is mounted in the radiator. This could well be faulty. It shouldn’t be losing water, you could have a number of issues causing that but I would suggest looking at 1 thing at a time.
@@TheParrottBros i was all day to mechanic , he saw the water cable for leak . Didnt saw any , check all fuses and they seemt to be ok , when he open the centraline under was 2 cable unpluget , when i pluget those the car fun start to work in full speed but the car was cold , he fixed the centralina and now they dont do that again only when i turn ac on , but the water keeps droping half a litter for 20 km , we dont see ant leak in radiator or pipes , where does it lost the water ? What could it be . in 20 km drive should the fun start working the sliw speed ?
Hello, my first fan speed always starts at 100 degrees, the temperature needle goes up when the car is idling, it goes up a little and then goes down quickly when it reaches 100 degrees. But if the car is completely stopped it doesn't start the first time. speed to cool down the car after driving with it
Theoretically if there is no power at the permanent of the thermal switch, and the fuse has been replaced has it got to be the main brain part not working ?
Great vid! on my Audi TT the fan turn on low speed but not on high-speed.
You should only see high speed when you go above 103 to 105°C, that doesn't happen very often if your slow speed fans working fine
Thank you, my man for responding. I changed the thermostat and the coolant temperature sensor now it’s working fine thanks again..
Hey great channel. Ok I have a mk1 tt 225. Had the car 2 weeks. The car sits at 90 degrees on the Dash and the coolant digital temp on the climate control unit was sitting around 80 when I stopped the car. I let the car idle for 5-10 mins and the genk gage on the Dash was still at 90 by tje fans were not kicking in as I would have expected. Then when I switched the car off there was no secondary fan or pump running as you have mentioned. I will check the fuse/s on the car later. Ans try and work back to the fault.
So the gauge will sit at 90 solid when its 80-100 on the climate gauge as its a weighted gauge, thats totally normal, if you turn the air con on do the fans run? and the pump on the radiator should run from the moment you turn the key on until almost 10 mins after you turn the car off
I own an 05 Audi A4 B6 1.8T. My fans turn on at a cold start and wont let my car warm up. I’ve replaced the 219 relay already but it was from a parts car. What else could it be. There was water in the ecm box but i noticed the car had this problem when i bought it before the box flooded
Fantastic video, just what I was looking for, the fans don't turn on and I'm looking to see if I can fix it, Thanks from Santander-Spain.
Awesome, glad to be able to help out mate
The fan on my 03 A4 doesn’t work anymore not even AC fan and I tried to run it with VCDS via output test and it still didn’t work, I tried to jump start it with a test lead on the connector for FCM and still didn’t work am I clear to understand that the FCM is bad?
I deleted my Aircon system out and am using a aux belt from a a3 non ac.
Now I have noticed the the low speed isn't working.
Is there a way to close the the circuit to allow the low speed to be working as if the ac is still on the car an working ???
Or is there a way to put a manual switch for the low speed.
It seems to be working from testing at the radiator sensor. But I have no ac motor or piping left in the engine bay 🤔
I keep going through fuse boxes every 3 months they keep melting
There is probably a little bit more to the problem then, which fuse is melting/burning?
Its the one all the way to the left of the box the thickest wire its black and I think its a 120a one its the only wire that gets hot
My fans stopped working after doing the timing belt and heater core ...but it does work when AC is on .maybe its the control module
Test the thermal switch in the radiator, that’s more likely to be the cause
i've changed fan control module and temp giver and fans work fine now but clima doesnt cool. I've heard about some part behind the glove box that can be the issue but not sure what that part is
There should be a sensor that measures how hot the air is in the blower cabin, looks a bit like a metal hedgehog, I’ll get a part number and send it over for you to have a look
Yeah that part has failed on mine. You can tell by the grayish foam which comes out from the air vents when the ac is running. There are two flaps which control the hot/cold airflow and that foam is the insulator. When it’s gone, the flaps don’t seal properly causing the issue. But I have to say, mine’s busted for about a year now and all I had to do was refill the ac freon. I live in a Mediterranean country and now it’s cold af in my cabin during the summer time.
@@dimitrist3561 yeah i notices some sponge/foam pieces in the vent, i went to refill freon first when ac stoped but they told me its full and just added some oil for lubrication iirc. do you know part number for that flap i think thats my issue
@@TheParrottBros iirc its some kind of flap behind the glove box but I'm not sure if thats the issue
@@77garga I couldn't find it, but take a look at the following article for a better understanding of the issue www.audiworld.com/forums/tt-mk1-discussion-9/c-blowing-detached-foam-insulation-system-into-car-1948972/
I’ve replaced literally all of these, and I still have to use the a/c to make my fans come on. The only thing I can think of is that maybe the brand of the thermoswitch I bought doesn’t cooperate with the car. Also I don’t have an after run pump. 02 180 5 speed Q
Sounds like you may have a faulty part, you could also have a broken wire etc. the thermo switch can be tested my using either heat or hot water to see if it changes state
I have a AJQ 1.8T vesion, what is the thermal switch model for my car??
Is the smaller fan, for normal cooling.
And bigger fan is for AC operation only.
Thanks
Both fans should run at the same time, slow speed and fast speed. ( fast speed only for when cars above 103c ) so if a fan isn’t running it’s failed
Got Audi A4 2.0l just got a problem of the fan and overheating will try that issue of aircorn. I did change aircorn compressor and no gas on it
Thanks
And wht could be the problem if boot is not being open? Sometimes it opens especially when it's cold when it's hot they is sun 🌞 doesn't open? Please help
Hi I have VW golf GTD to turbo recently just got the AC topped up temperature gauge read Dentist to check fuse box his fans was not working fuse as blown change the fuse fan started working fuse blown again no fans do not work and fuse keeps blowing even with the ECU off
Likely issue, fan has failed / gone short inside and is causing fuse to blow, that or a sensor has gone short, or you have a wiring issue. unplug one fan and replace the fuse, see what happens if blows plug back in and unplug other fan, easiest way to rule that out
Idk if you’ll be able to answer but I have an 08 Audi a4 and my heater hose broke and I replaced it and re added the coolant but when I turn on the heat(which blows super hot air) no fans come on, but when I turn on the ac, the fans come on
Hey bro ur videos are class... I've had my tt for 5 years and think it's the dogs balls but yesterday I was pulling away to and lost all power... My mechanic I know ish had a look yesterday and reckons my water pump seized on and it's jump timing but not snapped... Its a 225 and she's so clean and looked after what should I do and damage do u reckon is there .. Any help would be brilliant
Hey firstly thanks for the kind words, secondly sorry to hear that happened, not usually good news, it depends did it stop the engine dead? make any horrible noises? usually can cause bent valves worst case
Many thanks on the reply if anyone's gonna no its you.... Yea stopped completely dead at around 1500rpm... Its booked in this week for the head to come off to see 🤞... If u have a spare 225 bam engine would happily buy... Thanks again for knowledge buddy
also with extensive self repair.. cast flanges with new green sensor..
Mine isn’t overheating my issue is after every single journey my cooling fan is coming on for a couple minutes- it’s not loud but it’s there and it’s really annoying 😢plenty of coolant and can’t see any leaks but I see at end of video you say this is normal as some people tell me it’s not? But it does come on after every drive- it’s 2.0 TDI
Brilliantly informative video. Just subscribed!
Have I missed it? What I have a A/C pump clutch not pulling in, but if put 12v the connector, it works OK. Is there a separate relay or is it controlled by the fan control module?
Just working through these issues this week. Check this out.... large fan not working, ONLY small fan would engage (with A/C on or when coolant reached temperature threshold). Jumped the thermal switch, had both high and low speeds on both fans (conclusion bad thermal switch). A/C wouldn't blow cold. A/C compressor was only getting 9.5v...but was I was getting 12v entering the FCM. Swapped out the FCM (knockoff) - result was NEITHER large or small fan would run BUT I did had 12v at the compressor. Applied 12v directly (bypassing FCM) to the A/C compressor, clutch engaged (freon level was fine and small fan was running) but would not build high pressure in the system (conclusion- bad compressor.....and bad FCM). Was driving myself crazy trying think this was only one issue......all wiring/fuses were fine no corrosion or signs of overheating ......you must have been feeling my pain and decided to make this video....hahaha.
That’s probably the most annoying part of fault finding issues. New parts that you can’t always rule out. Even though it’s new and should work fine 😂. Top work for persevering through
@@TheParrottBros I definitely have a few more gray hairs! 🤣
Hey sorry for bother you if I buy the air flow Sensor I’m Supposed to take it to dealership to program to the ecu or I can just connected the new one plz if u have a chance let me know and the temperature gauge it goes really high and that’s when the fans kick out when the gauge is really high any Ideas because I know you’re really good working on Audis TT
@@victormagana1641 Sounds like you are presenting multiple issues that are not related to one another. Have you had the car scanned with VAG software? If not, this should be the first step. Did you get a code for the MAF sensor? If so, it's a straight forward swap. The fans cutting out when hot is very odd and can be caused by multiple issues. Check all the connections at the fuse box on top of the battery. If BOTH fans are cutting out, I would suspect a FCM or a Temperature Control Switch, but you should check voltage at the fans when they cut out. Voltage at the fans would point to the fans being bad. No voltage to the fans would point to an issue further up the electrical circuit.
@@victormagana1641 you can fit a new maf and providing it works and is not faulty it won’t need any programming etc. You may need to get a code reader and clear the fault codes. But you can just take battery off for 10 mins. Does same
Hey, thanks for the video, it's was very informative!
I was wondering of you disconnect the Coolant temp sensor, does it bring the fans on? I understand this works with most other cars.
Ty bud!
It’s not something I’ve tried but I don’t think it will, the fans are bought on by the thermal switch in the radiator
Hi all, I am cutting and pasting this from a recent FB post to get some opinions, maybe even from the man himself, anyway... here goes... when the temp reads 95/96 (via 49c) the drivers side fan kicks in for a little a bit and then shuts off again it does this periodically when the vehicle is stationary which is what I would expect and deem this to be normal behavior. The left or passenger side fan I would assume is the AC fan ? It isn't coming on at any point even if I have the temp set to LO and Auto, the air coming out of the vents isn't cold, that is one issue. The second issue is that when driving the temp drops from 90 to 70-75 very quickly and stays there until I become stationary again at which point it will creep back up to 90 over a few minutes and eventually to 95 and turn the driver side fan on. This doesn't seem like a faulty sensor but more like a faulty thermostat which is staying open and letting the air cooled coolant continuously circulate when driving. We don't see this behaviour when stationary as it can control shutting the fan on and off, obviously the air flow can't be shut off when the vehicle is moving hence the continuously low temp. That's my logic anyway...
2007 8p ac stuck in Econ and fans not running in either speed even when car is plenty hot on 95f degree day. Are the fans the reason the AC isn’t working. Also after parking car battery is dead in about 30 min. Thanks for the video.
Unsure as thats a different model, its the fans may have failed and its causing the ac to not work but without testing you wont know, worth getting checked and replacing if need be as you dont want your car overheating
@@TheParrottBros checked all the easy stuff but no luck. Possibly needs ac recharged but not sure if that effects fans. Also noticed the battery won’t hold a charge so car has to be jumped every time. Can a bad battery cause issues with ac system and radiator fans? Thanks
My Audi A8 Quattro 1999 is over heating and when I look at the two fans I see by the radiator, one fan that is connected to the belt and there is one electric fan that isn’t kicking on at all no matter the temp of the car. I watched your video all good info. Where should I check first thanks in advance
Not particularly fluent with a8’s buddy but I would check the supply to the fan and see if there’s power there or not. There’s a good possibility that you have a knackered fan or there is no supply maybe due to a failed fuse etc
Would a Coolant Fan control module throw a code on vcds if it was faulty?
I have an engine warning light and the bigger fan doesn't seem to cut in but the smaller one cuts in with AC. Fuses all look fine. Sounds like the big fan needs to be replaced, is there anything else that is likely to be wrong to cause the light?
I've taken all of the engine bay air con components out. My passenger side fan is constantly pulsing on n off at high speed and the drivers side running at low speed, both as soon as I start the engine. Any ideas how to cure this please?
just replaced fan module, radiator & twin fans replaced ..also new sensor on radiator...
Such a well timed video, my temperature has just started playing up, going to around 108 in traffic. I've noticed that with the Aircon on the both fans are spinning for about 30 seconds then both stop for another 30 then they cut back in again....also noticed that the overrun doesn't appear to be working :(
Hi do you know where the fan control module is located on the Audi A3 8P sports back 2008?
Thanks in advance
I don’t I’m afraid sorry
lots of foam insulation type of stuff seems to be occasionally coming out of vents ..
Thank you for the 10 messages 😂. Foam in vents is from the air vents them selves. The foam is out round each joint to help seal the system. Over the years this gets heat damaged and falls off.
what is usual temp supposed to be on 49c ? oil temp is at 90 degrees on 51c
I guess it's time I change the afterrun pump then, it only comes on sporadically when I turn off the car.
I certainly would if I was you, prevention is better than repair 😂😂
Trust me 😅😅
@@TheParrottBros Yes your right. I alway's thought it would just come on when some condition was met, but I guess I was wrong. I alway's make sure to cool my car down after pushing hard though, that already makes a big difference in turbo/manifold life.
@@m0rb1d43 Yeah i usually have a route i take home after giving it a good warm up haha, this just helps to gradually cool them down and for what they cost are worth having
Great video, very informative. My fans are currently not spinning (this is a mk1 Leon 1.8T, not a TT but figured this is basically the same). I've already replaced pretty much all of this stuff and they still do not work.
Stuff replaced with new parts:
-both fans
-switch in the radiator
-temp sensor on the side of the engine
-module underneath battery
-fuses on top of battery are all okay
Have tried to connect the fans directly as described and then both speeds do work. Temperature on the dash goes up to 90 normally and car does not overheat (so far).
All this is with ignoring the A/C (this car has the older knobs, not the climate control so there is no "econ") as there seems to be some damage to the condenser so this system is currently not in use.
Any ideas what else I can try/check? Unfortunately I'm a beginner and have exhausted my limited knowledge/experience haha
If your car isn’t going past 95 then your fans won’t need to come on as there is no reason for them to.
You can leave it sat there on idle and eventually the car should creep past 95 degrees and they should kick in but besides that I wouldn’t worry if your not seeing over heating issues. It’s easy to be come worried about this issue. I’m bad for it 😂
@@TheParrottBros Hm I see, thanks a lot for your response! This is my first VAG car (got it as a project for learning) so everything has been new to me. Many people say both fans should turn on when turning on the AC but since that isn't working, that hasn't been an option to check haha. Thanks again, I'll stop worrying about it.
Informative video!
Just a quick one, when I turn my ignition on.. car hasn't been run at all. I hear the fans burst into life and running full pelt. Is this normal?
If your air con is on then it could well be, turn your climate control off completely if the fans still start up you could have an issue with the fan control module
30 degrees outside .temp is never above half on gauge on dash clock.
Thanks Man appreciate you sharing the knowledge.
Thanks for the kind words and supporting the channel
When I turn the AC on, the smaller fan runs, the car overheats and neither fan comes on and also after turning the car off the fans don't run. If I spin the primary larger fan, it will spin for 30 seconds and then stop. I purchased a new cooling fan assembly, but I'm not sure if that is it.
It sounds like you have more than one problem, both fans should spin when ever the fans come on, if they are not coming on with the vehicle gets hot there is a good possibility that the thermal switch in the radiator has also failed
@@TheParrottBros I believe that also, I will pick one up while I have the car apart as everything is in poor condition. Thank you for the help!
Dom and company..I have a question about the aux water pump. I just replaced it but it doesn’t stop running now. I was looking this up and it could be my older battery in the car, or the FMC has gone bad? I’m pretty new at this but I definitely knew the aux pump was going out. In fact it fell apart when taking it out, lol. I have to keep the new pump unplugged until I find out what is causing it to run constantly (and after 10 min). Any thoughts on this??
This is very interesting, have you let it run for more than 15 minutes to see if it does turn off?
It could be a broken relay in the circuit, I would have to check my drawings,
@@TheParrottBros yeah it doesn’t shut down. And heater finally lost heat, so I’m getting the heater core and coolant system flushed. Hoses are gummy from years of improper coolant. So maybe boil down to temp sensors or something else. I did read on the TTforum that a new battery in fact, solved their issue. A weak battery wasn’t enough to keep the relay happy.
Thank you! Great video.
Thanks for the comment
Thank you for your helpful video.
Please could you tell me if the fans are supposed to run after the engine has been turned off. I have checked the after run pump and I can hear it working.
Once the engine is off and keys removed only the after run pump should run
@@TheParrottBros Thank you for your reply. That’s a relief. Please keep doing your excellent video’s.
My fans run with the aircon so guessing they're ok. Fans are not cutting in but the consul temp is lower than the dash temp higher up the range. Would a thermostat be on your list?
Both the dashboard cluster and the heater controls measure the temperature from the same place, the temp sensor on the passenger side of the engine. If your fans are not coming on when the car gets hot and the Aircon is off it is likely that the thermal switch in your radiator is failing or failed, this can be proved by removing it and then sorting out the two pins and see if the fans come on if they do then is the switch if they do not then he could be the control unit underneath the battery
Thinking whilst I'm there I may as well do the coolant sensor & thermostat........@@TheParrottBros
Hi, I tough I have an overheating issue, because the car was standing with running engine. I've tested the fresh replaced thermostat. I also checked 49C during the test, but started to overheat and I stopped the engine at 101°C, because the fans didn't turn on. After this video I realized, that ECON was ON. LOL. Thanks for that info! :) Anyhow, I'm wondering what if ECON is ON and I don't check it. Can it boil the water without turning the fans on?
Great info as always !! Can you lubricate the conections on the bolt down fueses ?
You can use an electrical contact cleaner, but on the bolted down ones that’s not so much of an issue it’s more to push in one that’s a problem
My power steering pressure switch was damaged I noticed when I was trying to find the fault with my fans. Replaced the ps switch tonight and now my fans are working
That’s strange 😂 but hey if it fixes the issue happy days ayy. The is the issue with 20+ year old cars. Doesn’t always make sense
I having bit of a,issue temp when driving. Normal. 88 to 92c. . Idleing. Temp goes up to 110c and back down again up and down then i get a little coolant leak. Near driver side wheel..
It sounds like your fans are not kicking in, you need to have a look at the thermal switch in your radiator as that should bring your fans on slow speed above 95 and fast
speed above 103
@@TheParrottBros yes ive changed coolant temp sensor seem to have do the trick fans come on a 93c 94c now. Temp when driving mid 80s.
fantastic
@@liam6488
Great video!
I wonder if you could help me solve my 2003 1.8T VW Golf overheating problem. It's driving me crazy.
When I get stuck in a long traffic jam it starts overheating. I think the fans high speed is not working at that point. Fortunately I get the temperature back to 90º quickly from 110 ºC by connecting AC.
Thermostat and pump seems to be fine as pipes from thermostat (lower) and from radiator (top) get very hot both, and it keeps 90º in normal driving.
I´ve checked both fans turn on (low speed) by themself at iddle and temperature stays at 90º, I also triggered the fans manually bridging the radiator thermo-switch connector. Both fans work in low and high speed.
What's the faulty component responsible for this, green temperature sensor, fan control module, fuses?
Thank you for your time helping us.
Please, @The Parrott Bro’s could you help me?
Drop me an email and we can discuss it, my email is dom@theparrottbros.co.uk
Slightly the opposite to the issues you explained here but I was wondering if you could help? My tt simply won't get to temperature! Confirmed with 49c trick, thermostat and temp sender changed.
Can't seem to get above 77 degrees even sat in traffic 😫
Thats a strange issue, have you used a genuine temp sensor? when was the water pump and Cambelt last done?
My fans work when I pull out the fuse inside the car. What do you think that would be?
That doesnt help diagnosis, are they working on slow or fast speed? when dont they work when they should ?
Both Fans work for me when AC is on but fans not working when A/C is off. Low fan speed doesn't come on by itself. Will the radiator switch that I cross turn the low speed fan on show that it's just that radiator sensor that is bad if I know that both fans run when A/C is on?
Thanks for this video I love my mk1 tt.
On the Radiator plug below battery. I checked my plug for voltage and only one of the two/three configurations is showing 12 V voltage on the Three Socket Plug on the Harness. The other Two configs on the connector sockets show Open (.02 ohms).
I did a Jumper as well in both configurations on the Harness connection and only One way works by firing up both fans with the A/C On or Off.
The Module is New and the heat sensor plugs are newer.
LOW TEMP FAN JUMPER TEST :FAILED
LOW TEMP & HIGH FAN JUMPER TEST : PASS
Harness bad?
I'm presuming the after run pump is pretty noticeable after switch off? Just turned my car off after a long run and it's silent under the bonnet...
Yeah you can hear it. It’s not loud but it’s obvious. You can also test it by starting your car leave it running on idle and open your bonnet and feel the pump. It should be running
@@TheParrottBros I've just tested the fan switch plug. Jumping the low speed pin and there is nothing. Jumping the high speed pin and they work. Does this point towards the resistors in the fans being at fault?
@@chrismawa that’s correct mate, the slow speed is effectively burnt out. So you can either Google slow speed tan resistor mod or replace the fan pack
@@TheParrottBros As I thought. New fans it is! Thanks a lot mate.
If i take the fuse nr. 6 off, my fan turns on....
Hi, my a.c works well and gets cold, however the low speed fan does not work. How can I test if the low speed is working? And if it does work what would I check? Thanks
If your a/c is working but the slow speed fan isn’t coming on then it’s likely failed. You can try putting 12v to it and see if it comes on or not.
Thank you so much
How many miles roughly before the fans should kick in.
in what scenario, its all temperature dependant, you can get your fans to turn on my putting your Aircon on without even driving the car
Thanks for the information, wanted to know whilst on the move I noticed that if I turn off climate control system I feel warm air flowing in from the footwells or just under dash. I'm gathering this is not normal.. any advice would be much appreciated. Thank you
That could well be normal as even when off a small amount of air will flow through the vents, try when its on changing it to air vents on dash then turn it off and see if air comes through them instead
Cheers I'll give that a go. thanks
Very good video and very thorough. However my problem is that my fans are working with ac on however they dont work when ac off any solution to this ? What should i look for ?
That will likely be your thermal switch in radiator. Unplug it snd bridge it out and see if your fans come on, if they do then your switch in the radiator is faulty. Very common
@@TheParrottBros thank you so much
@@TheParrottBros hello again. Many thanks for your kind advise. Happy to say that the problem is solved👍
@@marinoskazamias9252 awesome 👌🏻 glad I could help