My 01 Montana has a problem that apparently is not unique. The climate control fan speed selector stopped working last week. Speed 5 had stopped 2 years ago. Everything else works so when I select fan speed for the rear compartment everything works well, a/c, ventilation, defog, etc.
It seems likethe switch behind the know is defective. I took it apart but I have no clue what to do since the flat board is all welded together. Anybody have any ideas? The part is the same in the Venture and Silhouette models from 1997-2004.
My issue is that I intend to change car in a few months and am not going to spend big bucks to get a new part; would consider swapping one from a scrapyard or car for parts. Regards,
Sounds like the same problem I had with a 2002 GP, but it would stay on high speed only at first, even when the car was off. Took out the fuse for high so the other speeds worked and eventually it quit altogether. Quote to repair was over 600 to change the panel (switches).
Googled the problem, turns out that is quite common, and did it myself with $40 part. It was the resistor that controls the fan speed failed from water leakage under the cowl area.
-- Edited by 1965CS on Wednesday 16th of July 2014 12:52:33 PM
Interesting. If I pull the part out and photograph it would you be able to point out where the problem was on your GP? I don't have a soldering iron so I want to show it to my friend to see if he can get it to work. Been to a junkyard already but they didn't have the exact unit.
On the GP, the part in question is a small green circuit board with a coil resistor mounted on it. It plugs into the fan harness and it's located near the fan motor. Mounts with 2 screws and the coil side faces the inside of the duct work to measure air temperature. Apparently the GP is notorious for leaking around the windshield cowl and this part gets constant moisture so eventually shorts out, - could be similar issue with yours.
This is with the fan out, (the green part is the resistor unit)
Looks similar to this one:
-- Edited by 1965CS on Wednesday 16th of July 2014 02:09:04 PM
Nothing determined with certainty. My best guess at this point is that the motor may be shot.
I took all apart, tested with a voltmeter so the juice is definitely getting there therefor the control switch is working. The module seems to be fine although I'm not 100% sure because when I turn the know to speed 5, I hear a "click." However nothing happens at any speed. The fan itself looks visually healthy.
