Compressor HVAC: Description and Operation

A/C Compressor Typical:

Vehicles equipped with the 2.4L gasoline, 2.5L diesel, 2.8L diesel and 3.3L gasoline engines with the front heating-A/C system only, use the Denso 10S17 A/C compressor. Vehicles equipped with the 3.3L and the 3.8L gasoline engines with the optional rear heating-A/C system use the Denso 10S20 A/C compressor. Both A/C compressors include an integral high pressure relief valve. The A/C compressor is secured to a mounting bracket on the 2.4L, 2.5L and 2.8L engines and, directly to the cylinder block on the 3.3L and 3.8L engines.

The A/C compressor is driven by the engine through an electric clutch, drive pulley and belt arrangement. The A/C compressor is lubricated by refrigerant oil that is circulated throughout the refrigerant system with the refrigerant.

The A/C compressor draws in low-pressure refrigerant vapor from the A/C evaporator through its suction port. It then compresses the refrigerant into a high-pressure, high-temperature refrigerant vapor, which is then pumped to the A/C condenser through the compressor discharge port.

The A/C compressor cannot be repaired and, if faulty or damaged, it must be replaced. The compressor clutch, pulley and bearing assembly, and clutch field coil are available for service. If an internal failure of the A/C compressor has occurred, the receiver/ drier must also be replaced.