Receiver Dryer: Description and Operation

The receiver/drier is mounted in the engine compartment between the condenser and is part of the liquid line assembly. The filter/drier cannot be repaired, if the filter/drier is faulty damaged, left open to the atmosphere or contaminated the line assembly must be replaced.

The filter-drier performs a filtering action to prevent foreign material in the refrigerant from contaminating the expansion valve. A desiccant bag is mounted inside the filter-drier canister to absorb any moisture which may have netered and become trapped within the refrigerant system. In addition, during periods of high demand air conditioner operation, the filter-drier acts as a reservoir to store surplus refrigerant. Refrigerant enters the filter-drier as a high-pressure, low-temperature liquid.