Grand Prix V6-191 3.1L VIN M SFI (1998)
High Pressure Safety Valve HVAC: Description and Operation
High Pressure Relief Valve
The compressor is equipped with a pressure relief valve which is placed in the system as a safety factor Under certain conditions, the refrigerant on the
discharge side may exceed the designed operating pressure. To prevent system damage, the valve is designed to open automatically at approximately
3036 kPa (455 to 525 psi.). Any condition that causes this valve to open should be corrected, and any expelled refrigerant oil should be replaced. The
air conditioning refrigerant pressure sensor should also be checked for proper calibration.
