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Air conditioner not blowing cold air. We put coolant with gauge reading 25 lbs pressure. We think the compressor is coming on. The pipe coming out of the compressor is cool but, the air coming into the car is not cool and usually hot.

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Is the air actually blowing into the car?But it's just hot?It sounds like your blower motor is not turning to blow air.you have a fuse,check the switch that controls the blower,and the blower motor it self.

Posted on Jul 27, 2009

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2 Answers

My air conditioner compressor in my 2002 buick rendezvous stopped working.


Take to a shop that has the proper gauges and ability to vacuum the system properly. Do not simply try and add Freon as it only causes an air gap and false readings. In addition, some cars require a resetting of values on the cars computer brain in order to function properly.

Apr 15, 2014 | 2002 Buick Rendezvous

1 Answer

My ac blows warm air


You need to hook up a set of AC pressure gauges to the low side charging port and read the system pressures with the AC compressor turned on and running, it should be around 28-32 PSI. If the compressor press is correct you have some other problem like a broken air temperature control blend door inside the dash air ducting.

Jun 24, 2012 | Cars & Trucks

2 Answers

Hi have an 04 hyundai tiburon i dont know where to locate where to put freon for my aid condtioner


STEPS TO CHARGING YOUR CARS COOLING SYSTEM:

STEP 1) Look under the hood of you car on the left side of your cars engine. There should be two stainless steel lines coming from a stainless steel cylinder to your cars compressor. The two lines have plastic dust caps on them sometimes they are blue or black. Usally the black has the larger diameter tubing that runs between the evaporator and the compressor. This will be the port that you hook the refrigerant hose up to.

STEP 2) Start your cars engine after you have secured the hose hook up to the air conditioner line port. Once the cars engine is running, turn your cars AC on to Max cool. Shake the can of coolant well. The gauge on the can of coolant should read in the blue but if it is in the green your air conditioners pressure will be between 0-25 pounds per square inch. This means you will have to add refrigerant to the compressor.

If your cars air conditioner pressure is in the blue. The system has the proper amount of refrigerant and you do not need to add. If the gauge reads in the yellow you may want to seek professional help because refrigerant is not what is wrong with the unit and is probably something more technical and most likely something that you do not want to attempt to do on your own. The red on the gauge means do not add any refrigerant at all and to seek professional help.

STEP 3) If the pressure of your air conditioning system is in the green it means it is safe to add the refrigerant. You should wait for your air conditioning compressor to switch on before squeezing the trigger to add the coolant. When the compressor switches off then release the trigger and repeat until your pressure gauge on the coolant can says that the coolant is in the proper range. If the needle on the gauge is in the top part of the blue you have successfully charged your cars air conditioning unit.

STEP 4) Release the attachment from the tubing port and replace the dust cap back in it's proper place and you are done. The cars air should be cool and your compressor should cut off and on less often. If problems persist you should consult a mechanic or someone that has experience with air conditioning systems.

Jun 26, 2011 | 2003 Hyundai Tiburon

1 Answer

My air condition is not blowing cold air


best diagnostic method is dual head gauges. balanced pressure between low and high side in the off position is aroung 90 lbs. running low pressure is 20-40 lbs and high pressure 160-200, is the compressior not coming on? does it stay on, or click on and off. either might mean the freon level is low. try unplugging the low pressure switch on the low side supply line and shorting the pigtail wires together with a paper clip. does the compressor stay on now? if so and the air is warm or cool, freon is low. if the air is cold that switch is bad. if compressor still won't come on the list of possibilities grows longer: compressor, comp fan clutch, AC relay, restriction at several places... repair shop time...

Sep 04, 2010 | 1991 Buick Riviera

1 Answer

Air conditioner will not blow out cold air and we just put in coolant, what could be the problem? it is a 1996 grand am v6


you really need to service an air conditioner with all the professional tools what are the pressures on the low side and the high side ? what coolant did you put in ? and how much ? r134a will only work if its done right too much and it will blow warm too little and the same thing you need the right amount did you change the receiver drier ? its a moisture filter it only works for about 5 years or once it gets moisture in it then its no good and needs to be changed also most gm's use an orifice tube filter in the high side line it too needs to be checked and cleaned or replaced . if the gauge needles are jumping around the compressor is bad . if the pressure is high on the low or high side over specs = no cold air . hope this helps

Jul 25, 2010 | 1996 Pontiac Grand Am

3 Answers

A/c not blowing cold air


80lbs on the low side is WAY too much if the clutch is running, the high side you should see 125-150ish, the low 30-40. I would feel the lines (the bigger line going into the firewall to see if it is cold when your pressure is right) if so suspect a blend door motor which controls the hot and cold switching inside.

Jul 24, 2010 | 1999 Chevrolet Venture

1 Answer

Air conditioner cold then hot


If the A/C blows cold at first, then gets hot, it may be because there is air and moisture in the system. What happens is that as the thermodynamic cycle of moving heat goes on, water in the system will freeze at the expansion valve, stopping refrigerant flow.

If you put a proper set of A/C gauges on it, the low pressure side would show zero or a negative pressure, while the high side would be >150... Usually low should be between 25 and 45, but because the system is frozen up, nothing moves, so the compressor is acting more or less as a vacuum pump.


Solution:
Have a professional evacuate the system, replace the receiver/dryer, add a bit of oil and then charge the system.

Jul 10, 2010 | 1998 Dodge Ram

1 Answer

Air conditioner is not blowing cold air,


What pressure did you have? And Is the front of the compressor turning when you have this pressure. Also feel the two lines going to the compressor, one should be hot and one should be cold.

Jun 28, 2009 | 2000 Chrysler Town & Country

3 Answers

A/c not blowing cool air all of a sudden. Then smoke from the engine not alot but I think it's from the a/c it's self. Let me know if anyone experience this type of problem?


If a/c pressures go too high, it will blow open the safety valve. This is usualy due to the cooling fan not working. Did engine get hot too. Temp gauge go high?

You will need to add freon. A/c service port is behind right fender liner. remove liner for access. Do not overfill. Get R134A can with gauge on it.



please rate.

May 05, 2009 | 2000 Ford Focus

1 Answer

Engine overheats when heater pipes connected


I think you could be right about there being air trapped in the system.
Or the heater core(radiator) is plugged.
Either way you need a pressurized radiator coolant pump to put the coolant in without air being trapped.
Although,i have seen it done by jacking the vehicle up high enough that the radiator was now higher than the heater core level, and then the coolant was put in.
But this is dangerous to try.

Jan 29, 2009 | 1999 Ford Escort

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