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Eric, Automotive Repair Shop Manager
Category: Chevy
Satisfied Customers: 31903
Experience:  20+ yrs. experience as repair shop manager and technician.
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Chevrolet Tahoe 4x4: Compressor clutch engages fine, but blows

Customer Question

Compressor clutch engages fine, but blows hot air. I checked the pressure and it was about 100 psi and every time clutch engages, pressure stays the same on low side. I relieved pressure in the line and tried to recharge, but after a few seconds, psi was already from 35 to 100 psi after a small amount of refrigerant was put in. I am stumped and hot. Please help
Submitted: 2 years ago.
Category: Chevy
Expert:  Eric replied 2 years ago.
It would help to know the high pressure side reading with compressor engaged to be able to eliminate or confirm that the compressor is weak or not.
But with just a low side reading, and it being 100psi with compressor engaged, there are only two possible causes - orifice tube clogged or compressor is weak internally and suction side and possibly pump side not operating properly.
Without the high pressure side, it is simply impossible to diagnose it between the orifice tube and the compressor. This is why using full set of ac manifold gages is critical in pinpoint diagnosis
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Expert:  Eric replied 2 years ago.
I noticed we have not yet resolved your concern you asked about. I would sure appreciate it if you would reply so I can offer my skills and knowledge and repair guide access to help as best I can.
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