Receiver Dryer: Description and Operation

RECEIVER/DRIER
The receiver/drier is located in the engine compartment near the dash panel on the passenger side of the vehicle. The receiver/drier incorporates a sight glass for visual diagnosis of the refrigerant system.

High-pressure liquid refrigerant from the condenser flows into the receiver/drier. A drying agent, called a desiccant, is used to remove any traces of moisture from the refrigerant system. The receiver/drier also performs a filtering action to prevent foreign material in the refrigerant from contaminating the expansion valve. In addition, during periods of high demand air conditioner operation, the receiver/drier acts as a reservoir to store Surplus refrigerant.

The A/C refrigerant must be removed from the system before removing the receiver/drier using a refrigerant recovery machine. Replace the receiver/drier if an A/C system is left open for an extended period of time.

The receiver/drier cannot be repaired and, if faulty, must be replaced.