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Old 06-10-2015, 07:31 PM   #1
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Join Date: Dec 2004
Location: Shellsburg, Iowa
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Checking A/C the right way?

Help me settle a disagreement. A customer comes in and says "My A/C isn't working, can you take a look at it?". We pull the car in and see that the compressor clutch isn't engaging. We hook up the A/C machine and see that there's about 75 PSI in the system on an ~80 day.

What's the next logical step? Check the electrical side and see why the compressor isn't coming on, or evacuate the system to see how much refrigerant is in it? (or something else?) A brief explanation of the answer would be appreciated.

'04 Cavalier coupe M/T 2.2 Ecotec
Supercharged 14 PSI boost, charge air cooler, 42# injectors
Tuned with HP Tuners
Poly engine/trans/control arm bushings
Self built and self programmed progressive methanol injection system
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