The A/C compressor is a scroll type compressor that can adjust to cooling demands. The compressor is belt driven from the engine crankshaft through the compressor clutch pulley. The compressor pulley rotates without driving the compressor shaft until an electromagnetic clutch coil is energized. When voltage is applied in order to energize the clutch coil, the clutch plate and hub assembly is drawn toward the pulley. A magnetic force locks the clutch plate and pulley together as one unit to drive the compressor shaft.

When the compressor shaft is driven, the compressor pulls low-pressure, low temperature vapor from the accumulator; compresses it into a high-pressure, high temperature vapor; and pumps the vapor into the condenser. Carried with the refrigerant is the refrigerant oil which is used to lubricate the compressor. The compressor has a unique lubrication system. The rotation of the compressor acts as an oil separator, which removes some of the oil from the crankcase, where the oil can lubricate the compressor mechanism.

The compressor has an internal thermal switch which opens when the compressor temperature exceeds 155°C (311°F). This thermal switch protects the compressor if the compressor becomes too hot, or if the A/C system becomes low on refrigerant.

When the engine is turned OFF, with the A/C system operating, the refrigerant in the system will flow from the high pressure side of the expansion (orifice) tube to the low pressure side, until the pressure is equalized. This may cause a faint sound of liquid flowing (hissing) for 30 to 60 seconds and is a normal condition.

The compressor is serviced by replacement only.