Blower Motor Problems | Auto Repair Help
ฝัง
- เผยแพร่เมื่อ 26 ก.ย. 2009
- www.fixmyoldride.com/real-fue... My latest article explains how to use the lessons learned from the gas shortage of the 70s to increase your fuel economy today. Blower motor problems video highlighting diagnostic procedures for Diy car mechanics and there's more information available below (Show More). Proper electrical diagnosis of automotive blower motors will help prevent replacing the wrong parts. Someone asked how to check for a good ground so I added a video here showing two methods of testing ground integrity. • How to Test Automotive...
I also added a video that talks about what to do if the blower motor runs all the time even when the keys are pulled from the ignition. • Blower Motor Runs all ...
Finally, the blower motor is a common AC repair within the skill level of many driveway mechanics. I have a special article for Chevy and GMC truck owners with interior fan problems. Learn about the updated blower control module parts available from this next article www.fixmyoldride.com/AC-blowe... - ยานยนต์และพาหนะ
![มองหน้ากันไม่ติด (Awkward) - โอ๊ต ปราโมทย์ FEAT. MAIYARAP [Official MV]](http://i.ytimg.com/vi/4b02SY_r6Gw/mqdefault.jpg)
Mr. Gittelman you are an amazing person and this video is so good that I had to watch it several times. Congratulations!
After watching some videos on here I tackled mine it was the plug going to the blower on a 2005 Silverado! Check it your self & save a ton of money in shop time and on parts, thank you every one for your videos regarding this issue!
Hi Mark,
Thanks for your video. The heat quit on my 93 MB 190E today, and you've given me a few places to start. Several weeks ago, when I started using the heat this season, there was an occasional clicking sound, then my heat got pretty weak. More recently there's been an occasional whining sound, intermittent but noticeable. And today everything quit. Oddly, there's always a gentle stream of warm air coming out of the side dash vents. Glad for that now. Will try your suggestions.
That was the first time I actually was able to follow a freakin wiring diagram! Thanks.
I was appreciative for the diagram as well
1991 Ford Escort
Your explanation really saved me alot of time and money, Thanks.
mr Gittelman knows his stuff and sounds like a nice guy to boot, thanks Gman, Peace Gregg
Gregg Connolly 0
Patrick you are on the right track for sure. The default position is the defroster vent output. It's vacuum that pulls the blend door to the other positions.Most likely there is another broken line somewhere or a problem with the vacuum storage ball.I have seen a few cracked ones on jeep products. But of course these are not the only things that can cause this issue just the more common ones.
Thank you for the time you put into providing information, making a video, and answering questions.
I have an issue with my blower motor going off or turning on when I hit a pretty decent bump in the road.
I have just purchased a new blower motor. I am hoping that that fixes the issue as you said if you tap the motor and it comes on it indicates that the motor windings are starting to fail. Perhaps this is why when i hit a decent bump in the road it causes it to turn on or off. I am just sharing incase someone else has this specific problem. I will share more if after replacing the blower if it fixes the issue.
did replacing the blower work?
Awesome! Just what I needed! My AC only works on high...and now I can smell something burning...Now I know where to look. Great vid!
Danny V: Some dealer diagnosis will most likely be needed to pin down the problem. Two possibilities would be the blend door control motor that switches the air direction from the defroster to the dash vents. Another possibility would be the control head that sends a signal to the blend door control motor. The Dealer has a scan tool that can interface and test the climate control system.
Very helpful information this has given me help in knowing whats being done to my truck.
John: Most cars have a relay center under the hood. Yes relays can be tested. Another thing you can do is locate the blower relay and record the part number. Then you can look for the same part number used in another system and swap them. Manufacturers often use one part number relay for many systems to reduce costs.
Tom: If everything else is working fine and just the high setting is inoperative then the most likely cause would be the high blower relay. I say most likely because it can be the switch or control panel problems but the relay is more likely. Not sure on the 86 but I know on the 90's trucks the high blower relay is in a relay center under the hood. On those vehicles you can swap out the relay with the same part number relay from another circuit for a quick test to see if that fixes it.
Great explanation on how to diagnose the blower motor on my 2001 Excursion.
Thanks! I barely tapped the bottom of the blower motot and it started. Windings are on the way out. Glad I dont have to mess with the fuses.
Thanks! Dodge 1990 2500
I took the switch apart and filed the (H) high contact that had next to no gap, it was shorting to (B) Blower contact.
this is so very helpful thank you for your time creating and uploading this, im at a stand still with my 95 chevy k1500. I needed a new climate control module because the old one was falling apart. ive had issues on and off with the a/c and heat since I owned the truck a few years back but what im running into is the blower used to run on high only now it doesn't work at all. ive checked both fuses and they are good. ive replaced the relay, resistor, and blower motor along with the a/c control module. everything has been replaced but nothing works. ill turn it on low and it will work for a few seconds then it stop and now nothing happens on high. im at a stand still. any input would be so appreciated. this wiring diagram is very similar to my truck almost exact I just don't know what else to do. thank you for your time
thank you for taking your time this your head help me and fix my problems plenty information I thank you very much
Thank you soo much for replying! Turns out it was the actual switch itself!
Donna: I recommend you find a wiring diagram for this car. Some Chrysler's have a blower relay. A stuck applied relay can cause the situation you described.
This video is very informative and helpful. My high speed relay keeps burning out do you have any suggestions on to what is causing this to happen
Excellent...looks like my astro schematic. I just replaced my blower motor last week. The resistor was replaced a year before that. A burned out resistor usually means your blower motor will fail soon. Best to replace them both. Thanks for the video.
Rudy: When I have both a power and a ground problem I fix the ground side first. Poor grounds can make the electrical system do crazy things. You will have to check your manual to see where the blower is grounded. It most likely shares a ground with other systems. I have a link to a video showing how to test ground integrity in this videos description.
Yes Glen I would suspect the high blower relay in your case. Not sure where it's located on your vehicle but I would not expect it to be near the resistor block. More likely in an under-hood relay center or under the dash? Note that some GM cars have 2 fuses for the blower so check both of those. It could also be the blower switch or wiring problem but the high relay is more likely.
@melien85 The blower motor relay is what bypasses the speed control (resister). Testing the blower relay would be a good place to start.
Great video! Thanks I was able to use this video to repair my blower motor problem.
your the man, the green and black wires were toasted by the vent,defrost selector cleaned, recrimped, and works fine, will replaces selector and ends. Thanks for the insight.
@clos039 The way you described your condition it sounds like maybe a blend door type problem that diverts air to the proper vents. When this malfunctions it can dump all the air behind the dash.
What would cause the wires to my blower burn and melt. Your advise is greatly appreciated.
Jerry Z: The way you describe your problem it sounds like there is a problem with the blend door motor. This is what controls where the air exits from. The Buick dealer has a special tool for diagnosing and recalibrating the blend door motors. This is needed after replacing the control head I think?
Hi! Thanx for the great video! I have an audi a4 1996 with climate control. The problem is that my fuse is melting and the blower motor positive and negative connectors are getting hot only when on 75 to 100% speed. The blower motor is new but problem persists. I would apreciate your answer if you can. Thanx!
Nice video. Schematic was easy to understand and the video was simple a straight forward.
thanks for the video. I have a 98 explorer that the fan stopped working in. i replace the resistor and that didn't do anything. So I tapped the blower motor and it kicked on. so i'm gonna change out the blower motor.
this video helped me to identify my problem. the blower on my 2008 Ford Ranger became intermittent. either all blower switch positions worked, or none did. all fuses & relays checked out ok, so I suspected a short, a loose connection, or the blower motor at fault. tapping on the motor housing identified it as the culprit. something inside seems to be sticking so I'll likely have to remove it to find out why.
Hi resistance in the wiring, connectors or the motor windings themselves from corrosion or rust are a few possible and common causes of the blower motor running slower then the selected speed.
Excellent tutorial Thank You
honestypays2: Good question about checking the ground. I put together a quick video of how I check it with a test light and a meter for those who prefer to use a meter. the video is the most recent added to the Chanel and I'll also put a link to it in this videos description.
Answer 2) On the inside cover of most fuse panels is a road map to what each fuse protects. On older vehicles this was sometimes put in the owners manual.
Thanks! This made diagnosing pretty clear. I've never had electrical explained so clearly! Only problem, we missed the problem I'm having. My fan works on everything "except" high. It's a 2005 GMC Savana. Thoughts? (will check power at motor connection next)
Could be the high blower relay or the blower switch and of course a wiring issue.
Check the wire connections, these can get hot and distort, causes full open, zero current, when it is next turned on.
Thank you.
However mine has a problem blowing out into low position.
What seems to be the problem?
Hi hittelman, excellent video!
I already checked fueses, blower resistor, and grounds an everything is ok, I unpluged the blower connector and is giving 12.3 volts and the blower isnt working at any speed, but I connected directly to the battery and works fine (here is giving 14.2 volts)
So here is the cuestion, how I find or what is giving me low voltage to the a/c blower?
I watched another video where describes the Ohm in the blower resistor comparing a bad one vs a good one, and mine has the same results as a good one.
I forgot to mention that the speed control is working propertly.
Thanks
Hello I have a 1998 Ford F-150 I changed the motor change the switches on the Dash and the resistor the fan only works on low also change the relay what do you think it could be thanks
Great video I have a issue with my blower motor. It works but like at 1/2 the speed it should ( as compared to a known working one). I tested it with a know working resistor pack, and got the same weak blowing . Also, directly wired it to the battery and got same weak blowing..
Any ideas as to what might be wrong ? Its a Nippon Denso unit from a Porsche 944 Thanks
Thanks for the great video. I have a 2002 Chevy Venture Van that has a blower motor that blows on all the various speeds, however, I do not feel the high setting is strong enough. It could be they way they designed it. But, assuming it is and I am still wanting it to blower harder, what is a way to safely increase the blower speed beyond factory specs and or find a replacement motor that has a super blowing speed. If that super blower exists where do you find and rate them? I like Ac that blows you out of your seat lol. So, how do I achieve that if they designed the OEM to blow at an unacceptable High, but not high to me level. Thanks
Thank you. That was very helpful. Keep up the good work.
I have to bump a relay underneath my hood for the blower to come on. It also only works on high, does this reflect on the relay underneath the hood on a 1993 GMC Sonoma SLE, 4.3liter engine if that matters?
Please help, the relay under the hood I think has something to do with the A/C switch for the blower
my o5 seira, when i start the engine with the air switch on it blows my blower fan switch can you help me?
My ac blower spends on high with out the key in the ignition.. I checked a fues and relays and everything is fine. any one knows why ?
Very informative, Thanks!
hello thanks for the info I'm having a problem my blower motor started squealing so I brought a knew one once I install it the new one does work I turn my blower motor on high still no result my old one use to get hot when I touch it while on that's why I brought a new but now it want come
2007 ford mustang i replaced heater moter and resistor and relay moter still kicks in and out on any speed?
good info on wiring diagrams / 1994 capri no power to blower motor/ no power at 30 amp fuse at under dash box fuse missing and 1 terminal looks burnt / trying to help a single mom get heat in her car before winter really sets in thanks for any suggestions
Thank you for your video, its of great help. Maybe you can help me with my problem. 99 Land Rover Discovery 1. Blower motor not working. Tested the motor by Connecting 12V it direct, and so I know the motor works. I'm not getting power to the relay. if I manually close the relay everything works just fine. Resistor works on all speeds. Help! were does the power come from for the activator on the relay?
@imru06 Having to tap the blower motor to get it going is a sure sign that the motor is on it's way out. It does not sound (from your description) like replacing it will address your fan speed issues though. That will take some diagnosis.
I have a 97 Maxima and it only blows out hot air, even when its cold outside. The shop I took it to said it might be an electrical short and/or a leak in a hose. Any suggestions? Thanks for this video.
Hello sir, I have a 2006 impala and want to change ac controls to a newer model Hyundai ac control panel. What risks aside not wiring correctly should I consider? Please advise...
I have a 1997 Jeep Grand Cherokee. I have replaced the blower motor and resistor. I have also checked fuses and voltage at the motor. My blower motor works but when I have my ignition turned off, my blower motor is still slowly working until I pull the fuse under the hood. Everything from the system has been removed up to that 40A fuse eliminating them from the cause.
Good day, This video was very informative but i am having a problem with my ac. I have changed the resistor card 6 times and motor 3 times in 4 months and it keeps blowing. The fuse and resistor usually blows together only when i turn the ac switch up to 3/4 and more. Each time it does this. Sometimes u smell it burning sometimes you dont. What can be the cause of this. Thanks
very nice. thank you. you are very good at this, I can tell
Great Info thanks for sharing.
i have a citron xsara 2002 model the heater blower is stuck on full and the switch to turn the blower down isnt responding! any ideas plz doing my head in now thanks
I replaced a vacuum storage ball on a 98 Cherokee (not grand) with a straight six and it was on the p/side fender well toward the firewall if I remember correctly? I don't know on the diagram I'm not even sure if it's in all-data. The factory dealer manual might be the only place unless someone has made it available online? You can check in the Jeep forums.
95 cadillac sts... I've been having issues with the ac. I can hear the blower motor speed up and slow down but cannot feel the air blowing neither hot or cold. All the fuses are in good condition... any help??? thanks
My '11 Honda CR-V blower motor speed varies with the one selected in the HVAC control. What do you think would be the problem. Thanks in advance.
hi lgoudymg my deville was the same way i my self was pound on top of the dashboard . i took my blower moter out and c.k over and work good to i move the plug . my plug to the blower moter was twisted so twist back so no pressure in on wires and plug in . i had to ben the ground on the blower moter a bit to get a good connection and now it was working good so maby u need to c.k the plug and ground . hope it helps u
Thank you VERY much for all of the info!
i have a 04 4runner ive tested the blower motor and it works and i checked for power at the plug that goes into the blower and i have power coming from the plug but my blower never engages please help
Great video. I do't have a tester and therefore have replaced the blower, but the blower still did not work. So I replaced the resistor. still does not work.Checked the fuse and it is not bad. My 2003 GMC Savana utility van only has one fuse for the heater I guess, Under the hood. The fuse said Blow is the the blower? Still stumped. I can feel heat coming up but no force like before. Oh and the engine light is on.
A 2003 GMC Savana has 2 fuses. The Blow fuse under hood and the HVAC fuse I believe is under the dash on the drivers side. I see some diagnostic tips for your model over at 2carpros www.2carpros.com/questions/2003-gmc-savana-ac-heater-fan-stopped-working-w-o-warning-on-speeds-checked
EXCELLENT VIDEO. I have a 2003 Cadi Deville. Until this video, I thought there was a stuck relay somewhere. The blower motor only spins after I pound on top of the dashboard (usually over the the glove box area). All speeds work when it finally comes on. Is there anything else to check or does this sound like the blower motor itself needs to be replaced? If it needs to be replaced can you tell me where to start?
My 2005 mustang GT a/c blower motor only blows on low. No matter which speed setting you put it on. What could that be ? Do I need to change the whole control module ?
In my 2008 grand marquis gs my ac is not changing speed from the 2nd speed to the 3rd and it feels like the high speed is blowing like 3rd speed. What do you think the problem is? I have already change the blower and the resistor.
Have a 2008 Mazda CX-9 blower motor will not kick on till car is running for about 20 minutes then it works just like it's supposed to on high medium low. I changed the fan motor and the resistor and it's still doing it what could the possibilities be
@lamont22222 Some models have a high blower relay that is used to bypass the resistor block and run the fan at full speed.
I have a 2000 Nissan Maxima, SE. The heater is blowing hot air all the time, no matter what setting its on. I slide the Temperature knob to cold and it still blows Hot air. Then I turned On AC, and it still blows Hot air. What can I do?
Also how do I replace the cabin air filter. Thank you Sir.
I have a 2005 Pontiac G6 GT. The fan control works as designed. Clockwise,or counterclockwise to control speed. However, the air is somewhat misdirected. The air from the airconditioner does not come out of the instument panel outlets. Instead it comes out through the side window outlets. Which is not nearly enough cold air for these warm temps we are experiencing. It worked fine up untill about 2 weeks ago. Any advice would be much appreciated. Thank you, Danny V.
@renan111 A common cause of your complaint is when the condenser fan is not working properly. The condenser fan pulls air across the condenser when the vehicle is not moving and low speeds. At highway speeds you can sometimes have enough airflow without the fan working to blow cold air.
Hello,
I have a faulty blower motor. It got wet. I removed it and checked. So first attempt I replaced the resistor and cleaned as much I could. But I need to replace the power lead in the blower motor to get it work again... can that be done?
And do you have any website for such info?
Thanks!
Peter
Hey there Mark and thanks for your helpful videos. I'm having and issue that hopefully you can help me with. I have a 2007 Chevy Trailblazer LT 5.3 V-8 with digital heater controls. I had no A/C or blower operation, put power directly to the blower and it worked fine. There were 2 times before I did any troubleshooting when after turning the engine off and removing the key, the blower stayed on. OK so I ordered a Chinese replacement Module, brand new because I thought the $38 cost was better than the $150 one (I am cheap lol). I installed it and everything worked great on all speeds ...... for 30 seconds, then the blower shut down ..... for 10 seconds and then restarted again for 30 seconds and again shut down for 10 seconds etc etc etc. Told the Chinese people about this and they sent me another new module free of charge. My thought was OK something is getting hot .... shutting down until it cools enough and then restarts (kind of like an engine coil does). I installed the replacement and have the exact same issue. In my way of thinking ... Its not the blower motor because when it runs, it runs fine. Looked at all the Maxi fuses but if they are bad wouldn't they just blow ? Got looking at your video and am now thinking it is a ground issue, problem being I have no idea where to look for the ground. Sorry this is so long but can't find a problem on here like mine. Thanks in advance. Jon
Jon: The blower motor could run and still have an issue. I don't know exactly whats wrong with your trailblazer, but I've seen and replaced blower motors on your model for binding and or drawing to much current. With that said, the module is the most common issue on the trailblazer and many other GM models.
Would like to help Sharmin but many different things can cause this condition. I will list a few easier things to check. There are 2 fuses for the blower and a relay. The relay and 1 fuse I believe are in the under hood convenience center. The other fuse panel is under the dash on the left hand. Things like a bad blower switch and or wiring problems can also cause blower problems. Probably a good idea to get some professional diagnosis before replacing any more parts.
I have a 1988 chevy caprice ls brougham my A/C works on every setting but high....any suggestions
Mgittelman I have a 2004 GMC Sierra I already checked all fuses and relays. The hvac module does not work on speed #4 and the ac doesn't always blow cold air, sometimes it blows just vent air.
I know it's not the compressor.
we already had checked the fuses they look to be good. So is there anything beside the control panel that could be causing no reaction of the blower?
Can you tell me how to bypass my Blower resistor altogether on my 03 Dodge Dakota? I want to hook up a toggle switch if possible for high heat. I know the High wire going to the resistor is BLK/TAN but what would I have to do to get this to work. What would I hook the BLK/TAN wire to get it to blow high heat?
For what kind the cart is ? Can you upload one of an acura vigor 93 thanks
I have a 1999 Chevy Tahoe..police package..first let me start by saying that my blower motor was chirping..after awhile it completely stopped working...so i changed the motor..still nothing...so i changed the resistor...still nothing..i checked all the fuses..all good..What can possibly be stopping my blower from working?
Have a 1999 Suzuki Grand Vitara the fan will not work on any speed. Have replaced the fan, fan resistor and relay and fuses. How do you check the switch on the dash?
This is the only one video about blower motor problems, very well explained on YT.
Now i would ask u something not shown in the video...
I have a Hyundai Coupe GK 2003 1.6cc and i noticed recently that wires of blower motor get really hot when i switch on air..(blower works on any speed)
so hot that it was melting the connectors..
I tried to add an additive resistor to understand if blower resistor were too low but even the resistor started to burn.. what can be the cause of this high drain?
this was a great video thanks a million
I replace the neutral safety switch on my steering column and now my heater does not have any power going to it nor does my speedometer everything else is good and has power but those two things can you help me diagnose the problem
Whenever something runs when the key is off it's usually an indication of a bad power relay (stuck closed) but without seeing a wiring diagram for your lancer it's hard to say for sure. Just speaking in general terms!
Good video. How do you check the ground as discussed. Also, I did not see any fuses listed for Blower Motor. Some tend to have codes. Is there some way to determine the fuses for the Blower Motor? Thanks.
Hi , have a question about fusing the gbody El Camino heater blower motor /ac constant fire under the hood?
What if no power both of two wire for blower motor and fuel and relay good but no power coming on both any ideas?
justabrake: I don't have the wiring diagram for your exact vehicle BUT I think Chrysler uses a high blower relay in conjunction with the resistor. If this is the case the relay being bad (contacts stuck closed) is far more likely than a bad switch. In the end it could be the switch but it's just "less" likely. I don't know why but I seem to find bad relays in Chrysler products more then any other make, that's why I lean towards them.
hi my heater blower has stopped working it is a bmw e38 i was told the relay was the problem has i dont know which one this is i am stuck is there a way to test these relays
need help,,,93 jeep Cherokee heater only works on air conditioning settings ... have high medium high medium low an low ...switch to heat defrost or vent blower quits. new motor,new resister,new fuse,new relay,new high/low switch.... what have I missed
My 1999 wrangler tj HVAC works perfectly. Until I select front vents or feet vents (non ac) But everything else works. The defrost, defrost and feet, front, floor, that are powered with the ac. I replaced the selector. Checked all vacuum lines and actuators. They all work. So when I select the 2 settings that dont use the AC, the blower completely shuts off. What should I look for?
can you tell me where the 50 amp fuse is?..my motor spins with a jump cable..changed the relay and resisitor...was intermittent for a while..now hasn't worked for months...i also dont ever hear vacuum line noise..must check that also...car is 85 el camino with air disconnected at pulley belt...thanks...steve
I have a 1979 pontiac bonneville...in which the blower motor will not come on good fuse under the dash new motor new relay new resistor and new switch in the dash control still nothing but works whn i run a jumper wire from the batt to the motor....after a week of messing with it im freakin lost any idea what it could be.....
Hi hav. a 1994 ford rv. hav. power on fuse under hood .fuse inside is blown. is there anyway to bypas this fuse. i cant figure how to take out fuse block. tks.