Last post on Oct 26, 2013 at 6:48 AM
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Pontiac Grand Prix, Heating / Cooling, Sedan
#165 of 233 02 grand prix heater only works on 5
Jan 22, 2008 (12:37 pm)
Hi, I read alot of comments in here, but with my 02 grand prix my heater worked one day and the next it will only work on 5, same with the a/c. My headlights work just fine and so does my rear window defroster. Do you think it's the resister?
#166 of 233 RE: More Heater Blower / Electrical Problems [storm21935]
Feb 19, 2008 (9:06 am)
I have a 2001 GTP and I have been having this problem like you had. Blower won't work unless on 5 and sometimes it takes 10-15 secs to come on.. hear a clicking under steering column, AUTO headlights have to be turned on manually at night, and I have also been having problems with my mileage computer screen going out related to this. Have you figured out the root of the problem? If so please let me know what I can do to get this fixed otherwise I am going to probably get charged over $100 for repairs.
#167 of 233 2000 Grand Prix GT Climate Control Problem
Feb 24, 2008 (10:49 am)
Vehicle has a dual-control a/c unit.
Problem: If both temp controls are set to the same temp in dual mode, or if a temp is set at the drivers control in single-control mode, the temperature of the air exiting from the drivers vents is substantially warmer than that exiting from the passenger vents.
Actions taken: Drivers blend door motor and the exterior temperature sensor have both been replaced with no improvement noted. The driver side blend door can be manually moved through its full travel with no resistance noted. Running the diagnostics program through the climate control panel shows no current codes.
Question: Any suggestions on how to resolve this problem will be greatly appreciated.
#168 of 233 RE: More Heater Blower / Electrical Problems [treacotton]
Feb 25, 2008 (5:25 am)
I'm having similar problems anyone reply yet?
#169 of 233 RE: More Heater Blower / Electrical Problems [nick8180]
Feb 25, 2008 (2:17 pm)
Thus far I have received no corrective-action replies to my problem report. I am sure this problem has been seen and corrected by someone before so maybe we will get a solution soon.
#170 of 233 Re: 2000 Grand Prix GT Climate Control Problem [rgh1016]
Feb 28, 2008 (6:25 pm)
Here's what I have learned in the process of trying to isolate this problem:
1. No OBD current codes are indicated when accessing the diagnostics
through the climate control panel. A history code of 105 shows because I
removed and replaced the driver-side blend door motor.
2. With the driver-side blend door motor removed I could detect no
binding when physically moving the blend door from full-heat to full-cold
position. However, when the blend door was physically moved to the full
cold position the temperature out of the driver-side vents was 40 degrees (the same as out of the passenger side) in single mode operation.
3. Changing the driver-side temperature control from full heat to full
cold positions appears to cause the driver-side blend door motor to move
through its full travel (that is, from the full heat index marking on the
motor to the full cold index marking). However, the driver-side outlet
temperature is approximately 15 degrees warmer than the passenger outlet
temperature when the temp control is in the max cold position.
4. Replacing the driver-side blend door motor and the exterior temp
sensor did not correct the problem.
It appears to me that for some reason the driver-side blend door is not
being moved to the full cold position when the motor is installed and the
temp control is set at max cold even though the motor appears to move to the
full-close index mark.
Is it possible the a/c & heater controller is commanding the blend-door
motor to a position just off the full cold position even though the motor
appears to be at the index mark?
Because of item 2. above, I am convinced the blend-door motor is not moving
the door to the full cold position even though the shaft position index on
the motor appears to indicate otherwise.
Is it possible to adjust the blend door shaft positionslightly so the motor
will definitely move the door to the full cold position when the temp
control is set to max cold?
#171 of 233 RE: More Heater Blower / Electrical Problems [rgh1016]
Mar 03, 2008 (12:32 pm)
Problem solved ignition switch
#172 of 233 2004 Pontiac Grand Prix
Mar 04, 2008 (2:20 pm)
I have a 2004 Pontiac Grand Prix and i have noticed that when i press the recirculation button the light comes on but it doesn't block out any outside air. What can i do to fix this problem?
#173 of 233 Re: Heat goes off and on [yakkymom]
Mar 09, 2008 (4:43 pm)
You might check the passenger compartment air filter that is right above the blower motor. My heater quit blowing altogether and I checked the air filter and it was wet and stopped up. I changed it and it works better than ever. All vehicles from the 90's up have an air filter coming from the blower.
#174 of 233 Re: 2000 Grand Prix GT Climate Control Problem [rgh1016]
Mar 20, 2008 (5:43 am)
I have had the same problem auto care center said ac/heater control unit was bad they were wrong. If you unhook your blend motor from the door unit but leave wired turn your car on and turn your temp. down you should see the motor move if it is not lined up with the marker line on the motor take apart blend motor case and align gear with mark you may have to do this two or three times to get it right there is some type of travel sensor in the unit . once you are satisfied with this with your hand turn the actuator for the door to insure in right position (cold air coming out) the motor should slide back on with ease if everything is in the right spot . Let me know if this works for you