Pontiac Grand Prix Climate Control/AC
I have a 2005 GXP with 18K miles of problem free driving. I live in Virginia where in the winter the outside tempatures can get quite cold. <40 degrees. However, when I use the auto climate control and set the cabin temp to a comforable 70 degrees the air condition (AC) light always comes on. I sometimes turn the AC off which has no noticable affect on the inside climate. Is the AC light "on" normal when using the auto climate control? Nothing is mention of this condition in the owners manual. :confuse:
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Now, I've seen posts on this before. Under the plastic cowl is solid, that sucker is sealed to the windshield, and the weatherstripping is great. Someone told me the plastic cowl may be warped and I should get a new one. Dealer said it was $82.00 a side!!!!!!!!!!! But I really don't believe that's the problem.
Someone else told me about the rubber grommit for the wiring harness under the carpet where it comes out just below the dash. The grommit wasn't flush, so I sealed that up good. But I don't think that's the problem, cause that's where the subframe connects, and wouldn't the car have to be moving for water to get in there?
I've heard about holes in the firewall. DOes anybody know anything about that, and where it is? I had my glovebox out the other day and I was contorted under the dash, couldn't see crap there's soo much up there!!!!!!!!!!!!!
Any help would be great. Like I said, the car's great besides this. But this problem is very annoying and the carpet is on it's way out. Only $120 for a new carpet, but I need this problem fixed. I was soo pissed at this the other day that I went to look at the new stang (they're still crap!!!!!!!!!!!!!!!!!!!!!!!!!).
Guys, don't let this push me to get a Toyota. IF anyone has an answer, your help would be appreciated.
Thank you in advance.
Scott M.God Bless you on this Resurrection Sunday!!!!!
Any other ideas or quick checks to figure it out? My fan (a/c and heat) has crapped out too. It currently only has 2 settings: off and super high. I checked the fuses and they seem to be in proper working order.
Any cheap suggestions would be awesome. I am currently trying to save up some money so I can afford to fix the problems once I figure them out.
Its a 97 grand prix gt with sunroof.
Thanks everyone.
- Shawn
Sorry if this question has already been answered...but my auto climate control reading is almost always too low and thus my AC will not blow very cold air. I've replaced the sensor that is mounted on the back of the radiator...What else could be wrong? Are there other sensors? ANy help would be greatly appreciated.
Regards
And just a couple of weeks ago, it did it again. It was in the 90s here, but the sensor said it was only 26 outside and therefore would not let the A/C come on. I even tried to fool it by putting on the defroster, but the compressor would not engage. I tried shutting off the engine and re-starting after about 30 minutes in hopes it would reset somehow. I got home and was all set to take it to the shop the next day. After letting it sit all night, it must have reset itself because it was okay the next morning. It seems to work fine if I remember to shut off the A/C before shutting off the engine. It's as if the sensor wigs out occasionally when starting the engine and the A/C is on .... (for what it's worth).
Thanks everyone!
Kym
I just finished replacing the fan blower motor for $100 and had manually fixed 2 pieces of broken stripline in the reostat module (used for the 5 fan speeds) to save me the 35 bucks for a new part. The GM engineers designed the fan blower with a rubber hose that comes out of the bell housing to drain any condensation that builds up and the runoff is what drains out to the passenger floorboard. This is a poor design in my opinion. The original fan I pulled out that is five years old is pure rust. I looked deep up under the dash for possible ways for water to come down as I had my winsheid replaced 2 years ago but could not see any water lines.
I have a 1995 pontiac grand prix GTP with a 3.4 My Climate control under the radio is not working right..The AC air will blow out from the defrost and lower vents by your feet. But will not blow out of the vents in the center on both sides..What is causing it to not switch to the center vents??
Thanks Randy
There is a drain tube from the ac/heater that removes the condensation and any excess water as it rains. The tube leads into the engine compartment where the end gets plugged with debris. As the water builds up in the ac/heater, this water runs down the blower motor into the passenger rug. If you do not have water on the rug then the water held in the motor will short it out. In fact, remove the interior panel under the glove box and you may find green mold.
To fix your problem:
You will locate the end of this tube on the fire wall in the engine compartment about 1/3 the way down on the passenger side. Remove the 90 degree rubber elbow, clean it and re-install. Your problem will be gone.
the rubber elbow for the drain tube is under the hood on the fire wall on the passenger side 1/3 way down.
Thanks!
I took of the tube that leads into the engine and it was fine, clear as a whistle. So I tried shoving something up the pipe that the tube connects to and it went in a few inches but then came to a dead stop. What would work, in theory, is to hook up a drill and drill through the debris. The bad thing about that would be that the engine is in the way for any kind of drill.
Is there any way to unplug the debris from the inside? Or would it be possible to drill a hole in the area that it collects in and let it drain out into a bottle or something? Or do you have any other ideas?
HELP PLEASE
I have the same problem with my 98 GTP.
LP
Today I went out and started my car (2001 Grand Prix) to let it warm up. I turned the defrost on to high #5, and went inside for a few minutes. When I came back out, the blower was no longer running, but the knob was still on #5. All other settings, 1-4 still work but not 5. I believe numbers 1-4 run through the step transistor, but for the high setting, it by passes the transistors and goes straight to the relay. Could my relay be bad? Or the switch? Where are the relay and switch located?
I also have been noticing a small whining noise after driving my car for more than 30 minutes. After shutting it off and starting it again, it goes away. Any suggestions?
Thanks
1-4 are not working, but 5 is! Is this caused by the step transistor? Do you know where the step transistor is located and what it looks like?
Thanks.
Thanks!!!
It does not matter if i put the fan on high or low. It keeps vibration and squealing.
Any help or advice will be appreciated.
Thanking you
Adrian
Mike
I’m not sure I’d use the term ‘normal’ – but I never use the ‘Automatic’ setting – and the A/C light comes on probably 95% of the time when I start the car. Thus it appears to be operating as designed. I have not figured out why it does ** not ** come on occasionally.
In the Summer (here in Hot-Lanta) I turn it off when I don’t think I require (or desire) de-humidification. I happen to like fresh air – and almost always, even in Winter, have my moonroof in the vent position. Now, when it is cooler, particularly in the mornings, I just have trained myself to always turn it off - again unless it is quite humid and the inside of the windows requires running the condenser.
Just as I adjust the Temp, the steering wheel angle (I set it all the way up on exit), etc. when I start the car.
- Ray
Still, at this advanced age, able to learn new habits . .
Mike
Yes, it uses a tad more gas, but it's hardly noticeable in a 200+ HP car.
not impressed.
See, cuz I still have to get my oil leak fixed and now, today, my heater fan decided it only wants to work on level 5... So either I have heat full blast or not at all.
Yes, The Great Grand Prix.
Mike
Did your previous 3 GM cars have auto or manual AC?
I agree. it's stupid to have the AC running when it's cold outside, just to defog the windshield. The AC should auto disengage if temp is below 39. The car has a outside tempature sensor, so this could have been easily done. GM,, back to the drawing board. Otherwise, the car is reliable, has plenty of room , and fun to drive!
The 3 previous cars were all auto climate control systems. Two GMC's and one Chevrolet.
Mike
I am not really sure that the compressor is actually running or if the a/c light is just on. When the temps get below 40 degrees, I think the compressors normally shut off.
And as far as the car knowing the windshield needs defogging, I think the car is clueless. I have had it raining outside and the car does not know to switch it defrost mode. If I waited on the car to go to defrost mode, I would still be waiting. This was the same on the other GM vehicles I had with auto climate control. The only was you got the air output to the windshield was to press the defroster button. From there, ALL cars with a/c switch on the compressor when you turn on the defroster to help remove humidity.
I just hope that is the biggest problem I come across while I own the GXP.
My biggest fear is a blow out with no spare. Although I can rationalize that by thinking in over 30 years of driving I have yet to have a blow out and only remember one time having to change a flat tire.
Mike