Accumulator HVAC: Service and Repair

The suction accumulator/drier should be replaced when:
1. Unit is restricted, plugged or perforated.
2. System has been left open for 1-2 months.
3. There is evidence of moisture in system such as internal corrosion of metal lines or dark, thick refrigerant oil.
4. There are more than 5 ounces of refrigerant oil in suction accumulator/drier indicating bleed hole is clogged.

Do not replace suction accumulator/drier each time the following condition exists:
1. There is a loss of refrigerant charge.
2. A component such as a condenser, evaporator or compressor is replaced.
3. A dent is found in outer shell of suction accumulator/drier.



1. Discharge refrigerant from system.
2. Disconnect electrical connector from pressure switch.
3. Disconnect suction hose from compressor and cap suction hose.
4. Disconnect fitting connecting accumulator to evaporator core.
5. Remove accumulator-to-mounting bracket attaching screw, then remove accumulator.
6. Reverse procedure to install. Use new O-ring lubricated with refrigerant oil.
7. Leak test, evacuate and charge system. Check system for proper operation.