Electric fans not working on A/C air conditioning
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- เผยแพร่เมื่อ 11 ต.ค. 2024
- A short talk on why and when the electric fans turn on in car air conditioning. Also why the clutch may not engage. This car is a 2003 Dodge Caravan SE. The air conditioning fans were not turning on and thus the air con system was over heating. This is the simple trick that fixed the issue.
I always thought that turning on the a/c compressor activate the radiator fan at the same time. Thanks for showing that it is the pressure sensor that turns on the a/c fan!
Dude... Out of all the videos i been looking for yours had everything I needed. I really really appreciate you sharing this nugget of gold!
Youre the boss!!! 1 day ago i got struggled about my ac and stressed me out untill iwatched your video this 2am in the morning here in ksa.. The radiator fan is not working even i turn on my ac... Then i just unplugged sensor temp to not overheat the car.. But actuallly idont know it even my expansion valve was replaced.. Now i pluged the wire to the sensor swicth and now everything is ok.. Thankyou SOO MUCH AND GODBLESS YOU MORE
Simply AWESOME!!! I don't know how many searches I've done to fix this van, but this one did it! Similar to your case, it all started with the compressor seizing up. Replaced it, recharged. No cool, over 300 psig on high side with less than 20 psig on low side. Replaced receiver/drier, front expansion valve, and spent a few days removing/replacing the rear expansion valve. No cool, same pressure imbalance. During last recharge the fans turned on and the high side dropped below 100 psig. Found this masterpiece and thought for sure I was going to have to pull the system down and replace the switch. Tried pulling connector off and re-connected, condenser fan came on and I was able to charge the system, hello COOL air! Thanks a million.
Chris Castillo (*
Chris Castillo.yep fans effect the proformance of ac put some connector faliure spray. two both fan motor hornsts thats it
Thank-you sooo much! My fan was not kicking in on my Journey either now it does after a quick clean of the plug it is working again! My pregnant wife says thanks!!!!!
I always knew there was a switch that told the system whether there is enough Freon for the compressor to come on (so it doesn't run dry), had an experience once where I had to bridge the switch in order to get Freon in so there would be enough! However, I had no idea there was a switch for the fans, always thought those were temperature controlled. Thanks for the info.
My ac evaporator fan only spins up sometimes- I thought the motor was on its way out but this may be the fix I need, thank you!
I have the same thing when I turn on the AC , fans don't come on along with it, 1998 Oldsmobile intrigue, relays are good. AC wasn't working, it was a bad hp sensor. Replaced it and the clutch started working, I put some refrigerant but it was still hot air coming out of vents. Now I bought a kit to vacuum the system, and recharge it. Hopefully after this procedure it will work. But still no idea why fans don't work. Maybe it's not detecting enough freon? I don't know
Dude thank you... I have the same problem with my Dodge, and no TH-cam videos cover it.
Thank you.
wow i literally just wiggled the connector and the fans started working, thank you
I think that's everything I need to fix my ac. Thank you for this!
Thanks a million. I think I have the same issue with my cooling fans which really affect my aircon. I switch on aircon and fans dont come on, but I noticed something, when splash some water on the condenser for a while then the fans kick on. Is there a relation between water I pour on condenser, condenser and fans?
I saw a video long time ago giving the same solution, I think I should give it a try and the high pressure switch is of a vew dollars.
Worth trying..when I turn on the Aircond...the fan spin low....does this relate to the pressure sensor too??
I wish you would show exactly how you cleaned it for us dummy’s.. thanks
Copper wire brush
You are right no enough explanation for car condenser fan when should comes on and off, it is great help for me. Thanks so much
Looks like a new car buddy.
That's a great explanation of the problem thanks
Hi thanks for this video, I was looking the whole morning for this video, that must be why my Mercedes C200 radiator fan will not come on when the aircon is on, every video refers to the cabin fan but that is not my problem, thanks again
Hmmm? I'm wondering about your conclusion that the AC high pressure switch turns on the cooling fans. I've been looking at a lot of info and TH-cam videos to solve my own similar problem on a Ford Focus. What I've learned is that the two AC pressure switches (high and low pressure) serve one function - to cycle the AC compressor on and off as needed. According to the info I'm reading it's the AC relay switch that turns on the AC system initially including the fan #2 that cools the AC condenser. Am I wrong? It's okay if I am. I'm glad that your cleaning that connection seemed to solve your problem, though I don't know why. :-)
Stephan Boatin
thanks for your concern and important info, my fans(both) are runing slower than they should , and i dont know why, they are suposed to turn when a/c is on , they are but slow, and besides they are not Lo and Hi speed they are just one speed
ill apreciate if you cam help me
thamks again
I got a 09' 300 2.7 that blew the OEM Radiator. Swapped it out and the fans wouldn't come on? Turns out A/C has a coolant leak, possibly bad O-ring? All the parts are new, new radiator, new relays, new temp sensor, fans still won't come on? So I'm guessing that the A/C system pressure sensor isn't kicking the fans on because it's not reading positive pressure, even when the system is running? Any recommendations would be appreciated.
Thanks. Having similar issues. The Hyundai dealer said my Sonata radiator / AC condenser fan was bad...repair price: $569.00. I said nope and I installed a new fan assembly from Amazon. My cost $174.00. Did that fix the issue? NO! So, I'm looking to see why my brand new AC condenser fan speed won't ramp up when I'm stopped/idling at a light. My AC was putting out 45F degree air when the car was moving...so the compressor is good and the engine isn't overheating...but as soon as I stop my car...the AC air temp starts rising and will eventually be the same as the ambient air. (engine temps remain normal)
did you figure out your issue?
Thanks - sometimes simple stuff gets overlooked.....
Thanks. finally somebody who did have the same issue. And even a "possible" solution for it.
Will check if it is the same problem for my car.
You meant the pressure sensor no good so that fans not turn and com pressure not engaged ?
No one has made this video fml I’ve looked for days amazing
Thank you. I have been searching for a video about the fan not coming on but the compressor does come. Wanted to make sure that I was right. Thathe high pressure switch is indeed the one that does turns the fan on. I found that all three wires there were peeled off and touching. It might have burned the switch off.
Absolutely Brilliant!!!!
I think you saved me buddy. Couldn't find the answer anywhere until I saw ur video. Thank you!!!
Was your car over heating or just the ac wasn't working?
Thank you... I just wanted to confirm what controls the fans
When the fans weren’t working, did the AC immediately start blowing ambient temp/warm air, or did it start off cold like it should be and then get warmer? I just installed a whole new AC system in my car it had been deleted in... just missing the fan.... When I get the clutch to engage it doesn’t even try to blow cold air.... just hot Texas air.... wondering if that’ll get fixed when I put the fan in.
i am wondering if thats the issue with my 14 odyssey with its 3 relay set up?
very informative in such short video...thanks for the video
Thanks for the nice video, it is of great help to help me fix the a/c on my 2005 T/C van . GOD BLESS.
@Scott Fratcher does the system have to be empty to take off that high pressure switch or can it be taken off with refrigerant in the system? Thanks
Would the poor connection of the high pressure valve lead to no power to the female plug of a blower motor resistor?
Hi brother thanks for your videos I'm a subscriber.
Question please...
I have a 1995 Lexus LS 400.
The radiator fan is not activating.
It does work because i tested it.
I disconnected the connector that's connected to the ac receiver drier and the radiator fan turns on and stays on continuously the whole time.
But when I reconnect the connector the radiator fan turns off.
I'm trying to fix the fan so that it turns on when I turn on my air conditioner but the fan does not turn on when I turn on the AC.
I feel like it has something to do with that connection but I'm not sure.
Do you think I might have a bad sensor that's connected to the receiver drier?
Thanks.
Anybody knowledgeable please reply soon.
Both my 2006 honda accord fans are off with no power and all the relays and fuses are good. AC comprsor also does not engage. Could this be the solution ?
thanks this tells me now how to wire in my electric fan conversion on my silverado so my fan will come on when needed when I run my A/C. and not like some are doing and wire it up to the clutch switch so the fans come on when the clutch is in-gauged.
So I have a similar issue.....could this be the answer?
Hello everyone! My daughter's A/C quit working on her 2010 Corolla S, 1.8L. Took it to the shop and it turned out to be the blower motor control switch inside the car. Replaced it with OEM part, and everything was working fine. However, when the A/C is turned on, the radiator *cooling* fan does NOT engage, therefore causing high pressure in the system. It DOES turn on when the A/C is OFF, when the car gets up to operating temperature. The shop is stumped, and he has been a reliable mechanic for 30 years. Was thinking it could be the High Pressure switch, but does not want to run the A/C too long to avoid damage to the system.
Any idea what it could be? All relays have been checked and they are good. The Corolla has only one fan, but it has a high speed for AC then low speed, to keep the car at the appropriate operating temp. Please help!
This was very helpful
very interesting, and may well be my issue too. (My cooling fans on a 2000 Pontiac Montana work normally, but NOT when the a/c comes on.....) Yet I can't find any mention anywhere of a "high pressure sensor" for my vehicle? Is it by chance also known as something else? Do all vehicles have them? Any idea?
Good information for the problem
yes it took forever for someone to have a straight answer. I figured it out
Thank You for this video, I am going to check now that connector on my 1997 Mercedes, the fan sometimes come on but most of the time not.
Thank you for this video . Bro . But what if your refrigerant pressure is low that's why the high pressure sensor won't open to start the condenser fan
Is that both fans were not working?? My driver's side fan don't work. Other one works. I
is that why the clutch blew on the a/c I wonder?
Ford transit connect 2014, ac all works fine apart from the fan, it turns on and off but never run fully, when I unplug the the pressure switch from high pressure then the fan start to run full, plug it back stops again. Also I hear fine noise when ac is on and I believe the gas inside system does that? What would you advise? Cheers
Was ur a/c compreasot comin on & off no cold air & overheat even with hot air wen not use a/c?
Awesome. Thanks for the info!
Nice video. We said thank you very much. 😍
What did you use to clean the connectors?
When I turn on my ac the compressor clutch is running, air hot comes out and the fan doesn’t work. Do you thing the ac air cool Won’t comes out if the fan dont work ?
Check for refrigerant if have any in system if not check your condenser for leaks or if plugged up
Nice, great video and info, seems it´s what happened to me.
Toyata prado 2010 same problm cam.. condencer fan not working... relay havent negetive line .. how to sold thiss
Is this regarding to the ac cooling fan cuz my doesn’t come on
Fan no.1 works with compressor and when temp. goes up..
Fan no.2 not working..
There was short circuit terminal previously buytheway..
Thanks a billion!
Thank you so much. I'm going through the same thing on a 07
good info but wanted more of a demonstration.
Great stuff! Need help with electric radiator fan on Nissan D22 off even with relays and fuses ok. Thanks.
shamrai did it worked for you
Thanks for posting
Thanks Sir.
woohoo!!! thanks! this should be it. ac guy said fan should work with ac on. I said I wouldn't touch original electrical system.
High hopes on this
Thanks
My ac fans not working, both wires to ac fan are ground. I used a test light and both wires were ground. Clip on test light to pos on battery. Is that normal? I thought one wire should have power to fan??
One wire comes with power from relay and second one goes to compresor
I had this same problem on my w203 mercedes ,I couldn't fix .it kept knocking the compressor off.
Thank you
when your fan were not working. was your ac blowing any cold air? cause i have a dodge nitro that i replace the whole ac system and still wont blow that much cold air....
Juan Hinojosa probably need A/C pro I have my two fans not working rn and no cool air but don't wanna add ac pro till I figure why my fans aren't working.
U DA MAN!!!!! THANX!
Thank you ! You answered my question 😆
Thanks, same problem.
How do you take that off
Nice to know!!
tqvm..i think it goes the same to my car..will try n see..
Thank u I spend I month looking for that idea. Thanks
nice one
Really good video bro help me with a 2008 Toyota fielder wagon and and nissan e25 caravan
Thanx 👍
Hello anybody know where is high pressure switch on 2016 caravan
I am having honda accord, its ac stops working after some time and does not restart untill several times switch on and off. but when its wirking it blows cold air... some one can help???
same with my kio rio. how is your ac now?
My car fan not coming on when ac compressor is on
Thank you, I’ll try It!!
James Brocket did it work for you?
Thank you!!
i have a 2010 hyundai tucson and i can't find my pressure temperature sensor i know that's my problem
I had the same issue, thanks for the video
thanks, this might be it
I hope it works for me 😅 thanks
I got Lexus i can’t find it
my cars mazda 3 2006 radiotor fan not working
Who will repair car a/c fan. The 1, 2, 3 positions are not working. 4th position is working. Pl. Give me an expert advise
Probably you already fixed cuz 9months...but its a resistor on passenger side
When I turn my AC on both my fan comes on but doesn’t work when the engine is hot so the car Will overheat
That sounds like a coolant temperature sensor or your thermostat is stuck closed.
No pressure, so thats why my fan stopped working.
Yes the low speed one.... The high pressure sensor should still be good so when the car reaches normal temp the fans should kick on but yes that sensor has to be working for the low speed fan to kick on
My car runs at 230 before the high speed fans kick on without a/c so in other words the pressure turns the low speed 1 fan on even without a/c before normal op temp!
THANKS YOU JUST ENDED MU ENDLESS VIDEONSEARCH
Gonna joke on you for a sec. You said that black guy right there, RACIST !!! lol, Good video, thank you for the help.
little black guy there :D:D:D:D:D:D
i dont beleive all that i read !! and wont waist the time !! the high pressure switch - shuts the ( compressor) off when its to high !!the low pressure swith shuts it off when its to low !! very simple !!
Thanks
Thanks