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Sedans Pontiac Grand Prix Pontiac Grand Prix Climate Control/AC
192 messages, Last post on Oct 07, 2009 at 12:19 PM
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We have a 2003 Grand Prix that has about 100,000 miles on it. We are experiencing something weird and hopefully someone can shed some light on it! The heat only works when we are driving on the freeway (70 mph). As soon as we get off the freeway, it just blows cold air. Does anyone know what this could possibly be? We are going to replace the thermostat (if we can find it) and see if that helps. Help!!
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Replying to: yakkymom (Jan 20, 2008 12:40 pm) |
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| 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? | |
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Replying to: storm21935 (Oct 17, 2006 5:41 pm) 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. thx
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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.
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Replying to: treacotton (Feb 19, 2008 9:06 am)
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Replying to: nick8180 (Feb 25, 2008 5:25 am) Ray
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Replying to: rgh1016 (Feb 24, 2008 10:49 am) 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? Ray
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Replying to: rgh1016 (Feb 25, 2008 2:17 pm) |
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| 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? | |
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