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Tried everything..... almost

Alan 55

Buick Newbie
Buick Ownership
2001 Buick Park Avenue, previously owned 1997 Park Avenue
100 to 125 PSI
This is kind of basic but have you verified that the compressor clutch is engaging properly and staying engaged? If the compressor clutch is engaging properly and the pressures remain the same on both sides, it seems that the compressor is faulty.


New member
Buick Ownership
1997 Park Avenue
Assuming the clutch is engaging, I would look a missing or damaged orifice tube. Your compressor is working (maybe partially), as it's getting to 125psi but it needs a restriction (orifice tube or TXV) to develop a pressure drop for the low side.