Heater Blower Motor Troubleshooting




What do you think about this video?

jdunny33: I have a 2002 Impala and the blower just went out when I shifted from park to reverse. I checked began to check the DCV at the blower motor itself like you have here but when I was at the blower motor to check for voltage I do not get a constant voltage. It seems to have a slow drop as I continue to check it but is by no means constant or anywhere near 12 V. Would I continue to check the relays/fuses or would this possibly be something different. Thank you very much in advance.

Kyle Posey: 2001 sl2, blower works great... for the first 15 mins. The blower starts to slow down. Example: drove 15mins, on highest setting, stopped for red light and noticed my fan was blowing really slow. Turn it off, wait a few mins, turn back on and back to normal... everything checks out as far as testing goes. Any ideas? Thanks!

Keith Franch: I agree, he is measuring VOLTS not current... The battery voltage to be completely correct.. Not trying to be a jerk either... Only pointing this out as it could confuse an inexperienced guy and gal... Thanks for the video.. :)

Aaron Taylor: Thanks for the video Rich. I'll defiantly save this video for studies but I have a question. My girlfriend have a 2005 Dodge Neon. She puts her heater on and it squeals very loud immediately. But goes off right away when she turns the heater off. That would be a Blower Motor issue as well right? Bad bearing on it perhaps? 

A Dill: Why are you going backwards you had power as far as the motor?

megaleadjp: Thanks I just replaced my motor after checking fuses and found power to my motor. Resistor was good but got no air on all 4 settings.

John Strauss: you are measuring Voltage not Current. Current is measured by putting your multi meter on Amps not DC and connecting the meter in series within the circuit you are measuring, which in car circuits is close to impossible. just a friendly correction. not trying to be a jerk. 

douglas tucker: great video ... had my dash all torn apart to replace resistor .. took my trusty ole simpson 260 V.O.M. out to double check ... found bad wire @ the motor plug in ... looks like the plug might have been HOT as it is slightly melted & disfigured. Found the same wire harness @ junkyard for $2.00 and spliced it in about 4" back from old plug .. works like a charm ... Plenty of A/C & heat NOW !! Thanks !

James Blackburn-Lynch: My 2001 SL2 blower motor works on low speed (1) and high speed (4) but not on 2 or 3. I checked the resistor slot as you said in the video and found 12 volts there no matter what setting. I kinda thought the voltage would change as it went through different resistance circuits. If the resistor pack is fine, why are 2 and 3 not working? Weirdly, sometimes when the blower motor is going at speed 1 (which it does as I move it from 1 to 2 and 2 to 3), sometimes it jumps to 4. Any further advice?

Ronnie Figueroa: you are a great person, thank you for this video it helped me a lot. 

MrScotty46: my blower switch works 'sometimes'

justmepat Jachimiec: HELP HELP NEED VIDEO REPAIR AC HEATER BLOWER SWITCH, I have told my mechanic the blower control lever for low is now on high. I no longer have different control levels. Can I buy the whole bottom AC heater control, help where can I buy a new one. I live west suburbs Chicago, or maybe I should go junk yard 

maxie0789: When I test the voltage on the switch it jumps up to 18+. What could that mean?

maxie0789: Hey. I'm getting a high voltage when I test the switch power. What could that mean?

Rob Brown: Hey Rich, when you are checking the ground of the blower motor electrical connection, what ground in the cabin area are you touching the black multimeter wire to?

James Laskowski: Hammer tap restarted blower motor on 2000 xlt ford ranger

Ray Keefer: My 97 sl1 saturn the blower works but not on high, what could it be.

labattsipa: heres a question. my blower is very weak at the third setting,,all the others are normal. resistor has been changed. whats next?

Joseph Knight: I'm trying to fix the blower on a 01 Saturn SL1. The blower works when hooked up to a 12v source. I have good ground and voltage at the blower connector, but only when there is no load. As soon as I plug the blower in or add test light I get no voltage at the purple wire. Any ideas? I tried swapping the relay with the fuel pump relay with no success. When metering the relay socket, I have good ground and voltage on all three bottom pins (when the blower switch is on).

Altobellodobermans: My meter has two settings on my meter which are DCV and DCA which one do I use? Also on the ground wire test I have nothing coming up on meter. So does that mean it is my blower motor thats toast?

Michael Tesfaye: Can this same concept be used to diagnose other makes/models, or is it specific to the Saturn S-series?

Tom Bender: Good job; right Around The Bases... (baseball )...

b: the resistor goes on the blower motor causing it to blow slowly and thats the first thing that goes on toyota tacomas at least mine did and replacing it will give you a brand new like high speed full speed blower motor once again after you replace it . Usually the blower motor goes and it doesnt even turn on but if its blowing slowly then its likely that you need a new resitior for the blower motor and many times its right underneath or right next to the blower motor.

richpin06a: The only difference on this year is that the high setting goes trough the body control module on it way to the blower motor.There are only two fuse boxes on the s-series.

farmerinchico: Very informative, thanks!

Bill Goodman: I am currently trouble shooting my sw1 blower motor as It stopped working on me. I tested the connections at the motor and the ground was good, but I was not receiving power to the motor. My fuse box is a little different than yours, and it appears I don't have a blower motor relay... htt p://i.imgur.com/2VwHfv7.jpeg I noticed the recirc fuse was blown and I replaced that, but I am still not receiving voltage. Where else can I check? Thanks!

richpin06a: Sounds like a bad ground or the motor is no good.

69RSZ: @69RSZ 14.7 at idle

richpin06a: Thank you for 411.

starcruise12345: Nice video. Got a question. I have a 1996 Opel Vectra. The ac blower only worked if i turned the switch to highest speed ( 4 ). What could be the cause ? appreciate your help.

INDUSTRIALIST1234: Great video. Please let me know the following. 1) What are the symptoms of a faulty blower motor ? 2) Is it possible for it to affect both the a/c and heating at the same time. Please let me know.

69RSZ: @richpin06a The dash is not working,but the battery reading is 14.71 at idle.

ThePaulgregg: Richpin ROCKS!!!

richpin06a: You have a possible bad damper motor.Check out my video "Recirculation Damper Motor Removal"

richpin06a: The lower fan speeds go through the blower motor resister before they go to the motor.So i would start by looking at the blower motor resister.

Phil Ash: Hi, I have an issue with my heater/ defroster/ AC. When I turn it on nothing happens. It doesn't work on low medium or high. I have rear defrost but that is separate from the other controls and uses those lines on the window when I press a button. Any guesses? I would hate to buy a blower motor when it could be something else.

dlphoto: Here's a question. I have a 2007 Dodge Durango. I made it to the early stage of this video where you check for ground. I didn't find continuity so figured there's no ground. Any idea, where the ground should come from? I put a jumper into that side of the plug and took it to ground and the fan works. I wasn't sure if I could just permanently wire something in like this or if there is an easy place to look to see why I've lost the ground.

richpin06a: It could be the motor is drawing to much.

Buick Mackane: Can anyone help with a 96 Saturn SL2 problem? Started my car today and turned on the heater fan and the fan blows fine but I hear a clicking sound from under the glove box area. I found that if I push in the "re-circ" button with the fan switch on the clicking sound under the glove box will stop. If i turn the fan switch on for ventilation, heat or for normal AC the clicking under the dash comes back. Now I must drive with the re-circulation button pushed in to get max AC with no clicking. Why?

dLimboStick: You need to change the title of the vid. You didn't even test the blower motor. You disconnected the motor and tested the blower control circuit.

foxdmulder: thanks for your great videos.

Buick Mackane: Thank you Rich, I will check out your damper motor video and let you know what I find when I start working on the car.

MrWill1985: @richpin06a What was your blower motor doing? My 2009 Ford Focus blower motor works properly when I first turn the blower on but after 20-30 seconds later it stops working. My father checked it the same way you did and informed me the blower motor went up. So I got one on order right now. Do you think it is the motor? One source says it may be the switch. So I hope I didnt spend $97 for nothing.

Rob Grode: I still cant figure it out. I have voltage at the blower motor, but it seems low, like 10 volts, the switch seams to work(turning it up and down makes the voltage at the fan go up and down, but never above 10 or so volts. The fan motor is new, the relay is new, the switch is used but new to me, and i'm down to the last thing the resister. My question is: If I have LOW voltage at the blower motor, does that mean the resister bad? Also, is there any way to test the resister before i go buy one?

1bygoneby2: On your video you keep saying check your current when actually you were measuring voltage with your multimeter set to the DC range at all those test points!

Tom Bonnema: I forgot to sign the above post Tom Bonnema

69RSZ: @69RSZ 14.7 at idle,dash was not working.

Steve Rose: really just need to replace current with the word voltage,not that big of a deal. thanks for your help. I'm not getting a good ground and the voltage shows up regardless whether heater is on or off. there is no air flow. what does this mean? bad ground or bad resistor?

richpin06a: @MrWill1985 Sounds like you have a bad blower motor i have seen them do what yours is doing.

ricflair0124876: i have a 2004 mercury grand marquis gs and my blower motor only works on low speed when u first turn it on could it possibly be a bad switch or could the blower motor resistor be bad and also my radiator fan is not working the car ran hot and the fan never kicked on at any time could the sensor be out in the radiator fan the fan is a 2010 if so is it better to replace the sensor and fan altogether and if so can u do a video of a replacement on how to do it thanks

Rating:
Heater Blower Motor Troubleshooting 4.5 out of 5

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Heater Blower Motor Troubleshooting