AC Fan has a LIFE OF ITS OWN?? 04 Grand Prix

[Levi Hardin]

Recently came over from CLUBGP love the site!!

I am sitting at the Taco bell at night with the AC running... all of a sudden i hear the craziest noise out of the bottom right and the fan seems to be blowing on FULL Blast! I lose all control of the fan speed through the ac control dash. I can still control where the air flows and hot or cold but not fan speed. The real problem comes when i turn the CAR OFF!! The fan CONTINUES to run at FULL SPEED. Never turns off when i remove the key... i now have to crawl under the passenger side and unplug the fan connecting to the fan. As soon as i plug the cord back in, the fan turns back on without the key being in the ignition. Any body have any Help?

[Levi Hardin]

I miss clubGP when you could actually get a response to a problem

[Scottydoggs]

the fan resistor is most likely dead. only speed 5 works?

or the ignition (the key tumbler) is bad

[matt5112]

I miss clubGP when you could actually get a response to a problem

Use your sub to alldata to lookup diagram then diagnose using electrical troubleshooting.

Or blame us for having never heard of this issue. Your choice.

[Ophidia]

Mine did this. It was the fan resistor. I pulled a fuse under the hood (battery 4 I think) to make it stop when I turned the car off until I got the replacement resistor.

[Levi Hardin]

ive heard of it possible being the resistor on the fan .... And yes it is stuck on speed 5 or high blast when i plugged the plug back in on the fan

[Sven the Sexman]

I've seen BMW's do this because of the resistor. Didn't think GM would be dumb enough to use the same technology.

[sfrance]

OK... I have a similar problem. Only speed 5 works. Where is the fan resistor and how do I replace it?

[dsmuts]

It's behind the blower motor. It's a little uncomfortable to do but not hard.

[2006GrandPrixGT]

This happened on my parents 05 gp gtp comp - g.

Sent from my SM-G900P using Tapatalk

[Yarbeau]

Twenty minute job. Drop the blower motor under the glove box and the resistor is in there. Mine looked like it was destroyed compared to the new one I replaced it with.

Oh grand prixs.