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.

Fig. 2 Spring lock coupling disconnect & connect:

1. Discharge refrigerant from system.
2. Remove charcoal canister.
3. Disconnect spring coupling at suction line of accumulator/drier at bulkhead, then remove compressor suction line from accumulator/drier. Cap suction and evaporator core outlet lines.
4. Remove clutch cycling pressure switch electrical connector, then the two mounting bolts from accumulator/drier mounting bracket, and carefully remove accumulator/drier from vehicle.
5. Reverse procedure to install. Use new O-ring lubricated with refrigerant oil.
6. Leak test, evacuate and charge system. Check system for proper operation.