Question about 1997 Pontiac Trans Sport

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Air conditioning not working

1997 trans sport. a/c clutch engaging. just charged refrigerant and still no cold air.

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The most likely cause of this lack of cold air is that the temperature control blend door motor actuator is defective, this part is located inside the dash, most require the dash to be removed to access the blend door and motor..

Posted on May 20, 2009

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2001 Oldsmobile Alero 4 cyl , Air Conditioning, compressor clutch will diss-engage. Blower fan is working, Freon psi is good, All the fuses and relays are good, Did some testing, and the compressor and...


The pressure means nothing as far as the state of charge. You need to have the system completely evacuated and recharged with the specific charge weight for that vehicle. Only then can the pressures or anything else mean anything.

Aug 18, 2013 | 2001 Oldsmobile Alero

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My air conditioner is blowing warm air on the driver side and cold on the passenger side


see this steps and think with clearly and logically NOT feared. God bless you
checkmark.gif Start with the compressor. Does it engage when you turn on the A/C?
If so, the compressor is working and the A/C system probably contains enough refrigerant to make cold air, so the problem is inside the HVAC unit. Replace the motor that controls the blend air door (this is a difficult job and best left to a professional since it involves tearing apart the HVAC unit -- about an 8 to 10 hour job!).
If the compressor does not engage when you turn on the A/C, see if it will run by jumping the compressor clutch wire directly to the battery (use a fused jumper wire). If the compressor works when you jump it, and the A/C blows cold air, the system contains refrigerant and the fault is likely a bad A/C compressor clutch relay or a bad clutch cycling switch or pressure switch.
If the compressor does not engage when you jump it, the problem is a bad compressor clutch.
If the clutch engages but the compressor does not turn (the belt will start to slip and squeal), the compressor is locked up and you need a new compressor.
If the compressor clutch engages and turns the compressor, but the A/C still does not blow cold air, the system is probably low on refrigerant and needs to be recharged.

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Jul 24, 2012 | 2007 GMC Sierra Classic

1 Answer

My GMC Sierra's air conditioning works great but the driver side vents will spontaneousely start blasting out hot air. The passenger side continuse to blow cold air. If iI turn the truck off and...


  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.

May 24, 2011 | 2005 GMC Sierra

1 Answer

Air conditioning does not work; pumps hot air


Check that the system is charged with sufficient amount of r134a refrigerant.
Check that the air conditioning compressor engages its belt driven clutch when the car is idling and the a/c is switched to on.
Does the fan turn on for the radiator when the a/c is switched on?
Check that the fuse is not blown for the a/c in the fuse box.
Consider checking the blend door that it is flipping the right way to allow cold air to enter the cabin area through the vents. This may require disassembling the dash board.

Those are a few things I thought of that may lead to repairing your a/c problem.

Dec 25, 2010 | 2002 Kia Rio

2 Answers

My AC suddenly stop working, I was driving and the AC was running but as I said it just start blowing warm air


Your A/C system may have lost its charge of refrigerant, or the compressor may not be engaging when you turn on the A/C, or the blend air door inside the HVAC unit may be stuck in the HEAT position so no air goes through the A/C evaporator.
Start with the compressor. Does it engage when you turn on the A/C?
If so, the compressor is working and the A/C system probably contains enough refrigerant to make cold air, so the problem is inside the HVAC unit. Replace the motor that controls the blend air door (this is a difficult job and best left to a professional since it involves tearing apart the HVAC unit -- about an 8 to 10 hour job!).
If the compressor does not engage when you turn on the A/C, see if it will run by jumping the compressor clutch wire directly to the battery (use a fused jumper wire). If the compressor works when you jump it, and the A/C blows cold air, the system contains refrigerant and the fault is likely a bad A/C compressor clutch relay or a bad clutch cycling switch or pressure switch .
If the compressor does not engage when you jump it, the problem is a bad compressor clutch.
If the clutch engages but the compressor does not turn (the belt will start to slip and squeal), the compressor is loced up and you need a new compressor.
If the compressor clutch engages and turns the compressor, but the A/C still does not blow cold air, the system is probably low on refrigerant and needs to be recharged. If you Have an A/C gauge set, hook it up and see if the system has any pressure.
If it is out of refrigerant or is low, check for leaks, then have the A/C system vacuum purged to remove air. After the air is out, it can be recharged with the specified amount of refrigerant. It is important to get any air out as this will reduce cooling efficiency and may make the compressor noisy.
My advice to you if you know nothing about A/C service is to find a repair shop that specializes in A/C repairs and let them fix your cooling problem for you. Today's A/C systems with automatic climate control are very complex and reuire special tools and know-how to diagnose and repair.

Jun 03, 2010 | 2003 Dodge Stratus

1 Answer

2000 neon air conditioning electrical problem


You either have a bad refrigerant pressure sensor or a low refrigerant level.

May 30, 2010 | 2000 Dodge Neon

1 Answer

My 2002 Expedition air conditioner will sometimes blow hot air and others cold air


I would check the following possibilities:
1. Is compressor clutch working? - You need to do this when the ac is blowing hot air only - locate compressor drive pulley on engine - rubber belt wraps around it. Start engine and set to max ac. When the ac is blowing hot air, look at the center of the compressor drive pulley using a good flash light - watch it for a while, it should be spinning with the pulley - this means the compressor is engaged. If not, the compressor is not engaged. If your ac is blowing hot air, then the compressor should be engaged and running (trying to cool). If it is not engaged, then your compressor clutch is probably going out. Could be low voltage to clutch, but more likely the clutch is worn out and only working some of the time. Note: if working normally, the compressor clutch will engage and disengage in cycles- but the air should always be cold. If clutch is bad, compressor would need to be replaced (sold as one unit). This is tricky to diagnose and could take some time - you need to do it when ac is blowing hot air but set to max cooling.

2. Low on refrigerant or refrigerant has moisture in it? If your ac blows cold initially after being off for a while, then heats up, and continues to regularly cycle back and forth between hot and cool air, then the system may be low on refrigerant or the refrigerant may have moisture in it that is freezing and restricting refrigerant flow. An a/c shop can check refrigerant level and even replace refrigerant if moisture is suspected.

Could be other issues, but I would start with these.

Good luck

May 07, 2010 | 1999 Ford Expedition

2 Answers

A/C compressor not engaging.


IF THE SYSTEM HAS A LEAK, THEN THE COMPRESSOR CLUTCH WILL NOT ENGAGE. TRY PUTTING SOME 134A FREON IN THE LOW SIDE(LARGER OF THE TWO LINES). AND SEE IF THE CLUTCH PULLS IN. IF IT DOES, THEN THERE IS A LEAK SOMEWHERE. IF YOU GET THE FREON WITH THE LEAK DETECTOR DYE IN IT, THEN YOU SHOULD BE ABLE TO LOCATE IT RATHER EASY. SOME CANS COME WITH A STOP-LEAK, BUT THESE TEND TO CLOG UP THE ORIFICE TUBES. HOPE THIS HELPS. PLEASE KEEP ME POSTED. THANKS FOR AN HONEST RATING AND FOR USING FIX-YA. GOOD LUCK

May 16, 2009 | 1994 Pontiac Trans Sport

1 Answer

I have charger the air condition an sitt will not get cold


I am the original owner of a 1998 Ford Escort SE wagon. The summer of 2008 I had problems with my A/C system - the first A/C problem on this vehicle. Be careful that you do not over-charge your R134-A system.
1. Check that the A/C Compressor Clutch engages and drives the compressor properly (via the
serpentine drive belt and proper engine idling speed, A/C switched "on" etc.). If the A/C
compressor clutch doesn't engage and drive the compressor you will not be able to charge the
system to the correct refrigerant capacity and operating pressures.
2. You should be familiar with and have the proper tools to test & troubleshoot your auto's A/C
system. Test gauge(s), hose & connector's will be needed.

If the A/C compressor clutch does not engage the compressor, then you will need to troubleshoot the electrical system and components related to your auto's A/C system. This can be time consuming and requires more skill and information (accurate electrical schematics, etc.).

My problem:
1. A/C clutch didn't energize and engage.
2. System slightly low on R134-A, about a 7 oz. charge was needed after all was taken care of.

Solutions:
1. Electrical problem in the electronic controls for the A/C system. The "Contant Contol Relay
Module" (Ford part no. 3S4Z-12B577-BA, RELAY) had to be replaced. Sometimes Ford calls
this "black box" unit an "Integrated Control Relay Module". The location of this "black box" on my vehicle is under the engine intake air filter housing - replacement cost (new) is about $230;
(used) about $35.
2. Charged the required amount of R134-A into the system via the proper test gauge and related
equipment.
Please note: I have experience and training in mechanical (including refrigeration systems) and electrical systems.


Apr 25, 2009 | Ford Escort Cars & Trucks

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