Question about Pontiac Grand Prix

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2004 GP Heater stuck at full hot. Air conditioner clutch engages but temperature stays hot.

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  • collander Apr 24, 2009

    Same problem and car but I can control the vents (i.e. defrost,floor or combination)

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All A/C systems revert to all heat and defrost when any vacuum leak occurs. Check for any small plastic lines underhood that may be damaged or disconnected. Also listen carefully underdash for any hissing that may indicate a vacuum leak

Posted on Apr 24, 2009

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My air condition only blows out cold air not hot


Turn your air conditioner OFF and turn your heater ON. Air conditioners were designed to blow out one temperature of air... COLD.

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Air conditioner blows hot but freon is full


Your compressor could be faulty. Check to see if it engages when you press the AC button with the car running.

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2004 Chrysler Voyager, had an acrid burning smell and a lot of smoke when heater is turned on, also a rattling/squealing noise, all stops when heater turned off?


you more than likely have a sciezed air con compressor. most modern cars have climate control which uses air con even when demisting and when engaged the electric clutch tries to engage but the pump itself will not turn, clutch will get red hot and burn your belts

Nov 25, 2013 | 2004 Chrysler Voyager

1 Answer

Heater is not getting hot and the temperature needle isn't working


First I would have said your thermostat is stuck open. But if the engine is overheating and the gauge reads cold the cooling system is probably empty. Or there may be alot of air pockets in the cooling system instead of all liquid coolant.
If the system was full and the water pump failed the heater might not work but the gauge would read hot.

Jun 25, 2012 | 2004 Chevrolet Impala

1 Answer

Problem with heating and air conditioning. The driver's side is blowing hot air and the passenger side is blowing cold air


Air Conditioner blows warm air
  1. Air conditioner system is discharged. Have the system evacuated, charged and leak tested by an MVAC certified technician, utilizing approved recovery/recycling equipment. Repair as necessary.
  2. Air conditioner compressor clutch not engaging. Check compressor clutch wiring, electrical connections and compressor clutch, and repair or replace as necessary.

Jun 01, 2011 | 2004 Buick Century

1 Answer

Ac blows hot air comp is running


Make sure that the tubing around the accumulator is getting cold.
If not, the refrigerant may not be charged up.
Otherwise, the vacuum motor for selecting cold air may be not working correctly causing heated air from the heater core to be routed to the interior of the car.

Do you hear the vacuum motors working when adjusting the heat to cold selector? or changing the thermostat temperature if so equipped?

Jul 03, 2010 | 2004 Ford F150

1 Answer

Air conditioner blows hot air


this can be a few different things going on. 1. does the clutch on your compressor engage when a/c is turned on? If so, does it cycle on and off constantely? If its cycling, your low on refridgerant, which indicates that theres a leak. System needs to be checked by professional. If compressor stays on, and you got hot air, it indicates that the problem is with the heater control valve. Normally, this can be found connected to one of the heater hoses located on passengerside engine compartment. It might be electronic, or vacuum operated.

Jul 13, 2009 | 2000 Chevrolet Blazer

1 Answer

03 Eclpise GT with air conditioner problems


there is a sun load and ambient temperature sensor that needs to be looked at.
there is a switch system connected so that under full throttle,the a/c is disabled to give more power.there is maybe something wrong with the override.
i would check the a/c relay as in the daytime,when hot it seems to fail.get a can of cold spray,and when the car is hot and not working,spray the relay.the cold spray can be bought at an electronics parts wholesale supplier.the temperature of the spray is -60F and it is great for finding thermal problems.
cheers ,ed

Jul 12, 2009 | 2003 Mitsubishi Eclipse Spyder

1 Answer

2005 KA blowing hot air out when set to cold


start car.turn on air conditioner high cool .raise hood look to see if the compressor clutch is engaged and running.if yes your ac air door could be stuck closed or the air door vacuum actutator not receiving vacuum.a vacuum line is broken or off. or the control switch bad.that control the AC and heater mode. if compressor clutch is not engagged.check for power at compressor clutch.if yes compressor clutch coil open. or the air conditioner refrigerant R 134 is low take car to a private garage with a good reputation. they wont be expensive as the dealership.have them hook car air conditioner to a manifold gauge set to check your refrigerant low side and high side pressure.

Jun 24, 2009 | 1999 Ford Taurus

1 Answer

A.C.


HI. Here is a complete check list that will help you trouble shot this issue. You will find the problem in one or more of these areas stated below.

1. Check Drive Belts - The air conditioner utilizes a drive belt that supplies power to rotate the compressor, which is basically a refrigerant pump. If the belt fails the compressor has nothing to drive it, inspect and replace as needed to restore operation. If belt is intact proceed to the next step.

2. Check for Compressor Clutch Engagement - Turn the air conditioner to the "on" position and set controls to the coldest setting. Start the engine and allow to idle. Then open the hood and inspect the clutch at the front of the compressor, is it turning? "Engaged" if so, the system has enough refrigerant to activate. If the system is low on refrigerant it will not work properly. In this case an air conditioner recharge kit is needed to recharge the system. If the system is low on refrigerant it could cycle on and off, making a ticking noise. If the compressor clutch is not turning proceed to next step.

3. Inspect for Refrigerant Leaks - If the system has a large leak and no refrigerant remains it will not activate. First test system for a static pressure charge, with the engine off attach an ac gauge to the low side pressure port and check the state of charge. Depending on outside temperature there should be between 50 psi and 80 psi. (Cool and warm). A refrigerant leak detector is needed to inspect for leak, but if you do not have a leak detector there is an alternative method. The air conditioner system is designed to run with oil suspended in the refrigerant to lubricate the system. Check for oily residue outside the system by inspecting all hoses, compressor, condenser, evaporator or receiver drier and replace any component that has failed.

4. Inspect Fuses - Check under dash panel and under hood power distribution center. Replace failed fuses as needed, recheck system. If the new fuse fails when reinstalled a short circuit is present and requires diagnosing with a wiring schematic, follow circuits to locate short, repair as needed and recheck system.

5. Check Temperature Control Vents - The vents inside your car are controlled by a cable, electrical servo or vacuum servo. If the temperature blend door is not functioning properly it will cause warm air from the heater to exit the vents. To check this start the car and allow the engine idle, next turn the blower motor speed on low, switch the temperature control from warm to cold while your ear is close to the vents. You should hear the door move inside the heater box as it swings from open to close. If not, insect for a vacuum leak or a shorted motor in the servo, repair the leak or replace the servo motor.

Aug 31, 2008 | 1999 Oldsmobile Silhouette

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