A/C Compressor: Notes

Courtesy of JAGUAR CARS, INC.

The A/C compressor is driven by the engine accessory drive belt and circulates refrigerant around the system by compressing low pressure, low temperature vapor from the evaporator and discharging the resultant high pressure, high temperature vapor to the condenser.

To protect the system from excessive pressure, a pressure relief valve is installed in the outlet side of the A/C compressor. The pressure relief valve vents excess pressure into the engine compartment.