Blower Motor Intermitting. I can Help

[wball]

I recently found my fan/heater blower motor decided to stay on EVEN after the key was turned off. I found out that the fan blower control module was considered a hot connection meaning once it was stuck closed, the motor would run constantly. I disconnected the BATT 4 fuse and replaced the fan motor control module under the dash on the passenger side. It took about 2 hours and $120.00 for the module. Then the fan worked fine, FOR A WHILE.

Now its intermittent, coming on whenever it wants when the cars running. Now there needs to be a capacitor added to the fan control module wiring harness. Once I added this part, I have no problems since. There was a GM service bulletin announcing this.

So if anyone has this issue, then this will fix the problem.

NOTE: If your fan motor stays on when the key is off, replace the fan motor control module, AND add the capacitor.

NOTE: If your fan motor works periodically, replace the capacitor ONLY.

Hope this helps those who are looking for this issue.

[Fivefingerdeathpunch]

good info

[220thous miles and going]

how much did the capacitor cost and did it fix the comes and goes with bumps in the road problem

[wball]

I also replaced the resistor and blower motor just yesterday and the cost was 345.00. So far its working. The blower motors working great now.

The capacitor only cost $10.00 but it did not solve the problem like it was suppose to do.

[quickster]

I had the intermittent problem, and found a wire (E) on the harness connector at the resistor was bad. Spliced in a new connector today, and fixed the problem. Just another thing to check if you're having this problem. Good info. wball.

[wball]

Thanks, whatever to do to help others with this problem. It seems to be a popular problem to.

Oh, glad to hear you found a wiring problem at the resistor. That will save a few dollars. Good job.

[quickster]

Thanks wball. Yeah, the connector was $35.00, labor $0. If I ever have to change the control module/capacitor, I may ask you for a detailed procedure on how you did it. Nice when someone posts a thread to help everyone else. Much appreciated.

[Dabman]

I have a thread with pics about this. My fan would stay on / turn on all by itself when the car was completly off, killing my battery twice. All I did was replace the blower motor resistor, $15 on ebay. My 1 and 2 levels did not work either, then i replaced it cuz it was killing my battery, now I have all 5 again