Last post on Oct 26, 2013 at 6:48 AM
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Pontiac Grand Prix, Heating / Cooling, Sedan
#143 of 233 1998 Pontiac Grand Prix GT 3.8l v6 Coupe A/C Problem
Sep 26, 2007 (3:47 pm)
I've owned my 1998 Pontiac Grand Prix GT since it came off the Dealer lot in 1998. The only real problems that I've ever really had with it is basic wear and tear except for the replacement of the altenator 3x after having to replace the speakers. I have had the low coolant light come on, due to corrosion of the sensor. The only real problem I've had with my Pontiac Grand Prix GT is my Air conditioning system went out on me after 7 years of use in Florida weather and had to have a new compressor put in.
Now for the real problem. My Air Condition is doing this absolutely weird thing of only blowing the cold air out of the passengerside vents and not the driver side. My Husband has taken the dashboard out of the car to try to find and fix the problem. Does anyone have any idea what could be causing this to happen? I'm thinking that the "flapper door" is stuck in one certain position causing it to only send the cold air to the passenger side instead of both sides, but would like to know what/if there are other possiblities that may be causing the problem.
Any suggestions would be greatly appreciated.
P.S. My low coolant light is still on even though everything else has been fixed.
#144 of 233 Re: 1998 Pontiac Grand Prix GT 3.8l v6 Coupe A/C Problem [cherokeerayne]
Sep 27, 2007 (7:16 am)
make sure your ac is fully charged because low freon will also create this problem
#145 of 233 Re: 1998 Pontiac Grand Prix GT 3.8l v6 Coupe A/C Problem [chad8]
Sep 27, 2007 (1:05 pm)
Well, my husband said more than likely not low freon as the passenger side is like a meat locker. The air blows evenly and forcefully through both passenger side and driver side vents. Only the driver side is blowing "warm"/non-cooled air through the vents. The other things is there the system is only a one core system with a common evaporator. The problem has to be in the air flow doors or in that general direction as to the problem. He said he may be wrong as to what he thinks the problem is, but has checked the freon and it is fully charged. The a/c had to be fixed a couple years ago as the compressor died and the a/c system was taken apart and parts replaced by a reliable GM certified mechanic. Any other ideas however, are greatly appreciated since my husband is already working on the problem and is going through and checking the most logical areas where the problem could originate.
#146 of 233 Re: 1998 Pontiac Grand Prix GT 3.8l v6 Coupe A/C Problem [cherokeerayne]
Sep 28, 2007 (10:46 am)
I had the same problem. Short answer is it was low on freon. This will cause the problem. I had cold air pass/ warm driver. I had system recharged Valvoline, but they must not of done it properly. So after that I changed out...ACC unit, checked actuator, changed driver side temp sensor, changed outside temp sensor. Finally took it to my mechanic and he said he just added more freon. Blowing out freezing cold both sides!! If that is not your problem then the first thing I would check would be driver side actuator if it is an automatic dual climate control system. not sure if it is same on your car( i have a 2000) but it is fairly easy to get to. Remove kick panel under steering wheel, take steering wheel kick panel off(metal one). First time took awhile to take out, when I re checked it, took about 15 mins. Search "Morads" on ebay. He deals in used parts and has theses available.
#147 of 233 Re: driver side a/c fine, passenger side hot air [kgnpeny]
Oct 03, 2007 (2:29 pm)
FYI, the problem was a faulty passenger side actuator/motor.
#148 of 233 Re: Climate Control Fan [del_64]
Oct 16, 2007 (4:51 am)
I have a 97 grand prix, first problem was that the fan motor quit replaced the fan motor, at first the unit worked fine now I only get an air flow (hot or cold) on fan stting 5. I have read on this forum about where the fan motor resistor is located but that appeared to be for newer gp's. Is this location (behind & left of the motor) accurate for my year as well? Sales person at part store said it would be behind the selector switch under the radio, after an hour of work found he was way wrong. Your price was accurate the resistor is only about $25.00
#150 of 233 Grand Prix heating problem
Oct 23, 2007 (8:39 am)
The heating in my 2002 Grand Prix is not working as it should. Now that fall has arrived, I've noticed that its taking much longer to heat up, and the temp is not as hot as it should be. I've also noticed that when it does heat up (warm/not hot), it sometimes reverts back to a cooler temp. I recently replaced the resistor that caused speeds 1 & 2 not to work, but that should not impact the temp. Any ideas?
#151 of 233 Re: Pontaic 98 GP GT A/C Blower dead [shadow83blk]
Oct 23, 2007 (11:56 am)
I forgot to mention that the car has Climate Control (3 wired blower).
The car is my son's and he is away at college. He just called and the blower is completely dead, the connector is melted. Earlier he was able to get it running by wiggling the wires and the connector made contact. He didn't tell me that he had to keep doing this though. He is frantic and hot since I am not there and have no idea what it looks like. Does anyone know if the connector is wired to the blower and can be replaced? He said that it looks like it is part of a plastic housing.
#152 of 233 2005 Grand Prix heater problem
Nov 21, 2007 (7:48 pm)
in my 05 GP i have the 3.8l non-sc and my heat doest get hot as it did, the temp ride a little lower than normal what do you think