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frank, Chevrolet Technician
Category: Chevy
Satisfied Customers: 3420
Experience:  33 years experience,24 years of Chevroler/GM experience and training .ASE Recertified Master Tech,
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2001 suburban: ac..warm air..the pressure switch to get compressor

Resolved Question:

2001 suburban ac problem. AC will not blow cold, only warm air. Recharged system, bye passed the pressure switch to get compressor stay on to check that the compressor cluctch works.. The low pressure line is cold but no cold air through the system.
Submitted: 7 years ago.
Category: Chevy
Expert:  frank replied 7 years ago.
You didnt say if you have rear a/c or dual temp controls but if the line is cold and the pressures are fine all that is left is the temp actuator or a problem with the temp blend door.
Customer: replied 7 years ago.
Have rear a/c, no dual controls
Expert:  frank replied 7 years ago.
Is the rear a/c working and will the compressor come on when you turn the switch on and the switch illuminate
Customer: replied 7 years ago.
It was blowing warm air in the back also, the switch will light up and stay on when switched to it. the compressor will come also.
Expert:  frank replied 7 years ago.
Since the front and rear a/c are controled sepertly double check the lines under the truck in the right rear-remember pressures and temp are about the same-it should feel about 35 degrees.It would be strainge for both front and rear to malfuction at the same time unless the compressor has a problem and both the orifice tube and expansion valve are not plugged.Do you know what the pressures are?
Customer: replied 7 years ago.
the pressuire is about 35 when the compressor comes on. Not sure about the high side.
Expert:  frank replied 7 years ago.
The compressure runs-you did add the proper amount of freon for a dual ststem which is more then a single system-the low side line at the front and rear evaporators feel cold?
Customer: replied 7 years ago.
there is a rear evaperator?
Expert:  frank replied 7 years ago.
If you have rear a/c there is a rear evaporate-you said you has rear a/c-the lines are under the right side rear ward of the rr tire.
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