Stores liquid refrigerant to ensure constant supply to expansion device. Accommodates system load changes and prevents liquid slugging to compressor.
May have a 535 psi pressure relief valve. Desiccant removes moisture that would form acids and damage components.
Cylindrical metal canister with refrigerant lines. Look for pressure relief valve on assembly. Can have pressure switch attached.
Contains desiccant bag, filter screen, and pressure relief valve. Inlet from condenser, outlet to expansion device.
Located on receiver/dryer body. Releases refrigerant to atmosphere if pressure exceeds 535 psi. Prevents system damage.
Hot liquid from condenser enters, cools and flows to expansion device. Should be warm to touch during operation.
Receiver/dryer desiccant has finite moisture capacity. Once system is opened, atmospheric moisture enters and saturates desiccant. Saturated desiccant cannot remove additional moisture and allows moisture to circulate, forming acids that destroy system components.
Inlet should be warm from condenser, outlet slightly cooler. Large temperature difference indicates internal blockage.
Check for damage, corrosion, oil leaks.
System performance issues, intermittent cooling, or TXV freeze-up can indicate saturated desiccant. Replace if system was opened.
ALWAYS replace receiver/dryer when: system is opened for any repair, compressor fails (metal contamination), or when performance indicates moisture contamination. Never reuse old receiver/dryer.
Moisture combines with refrigerant to form acids that eat metal components, cause compressor failure, and corrode aluminum parts.
Moisture degrades the ability of refrigerant to remove heat.
Moisture freezes in TXV and causes erratic pressures.
Serviceable and attached to condencer.
Located next to coolers. Has pressure switch installed. Note orientation for proper hose connections.