Compressor HVAC: Service and Repair

Air Conditioning (A/C) Compressor













Removal and Installation

NOTICE: If installing a new Air Conditioning (A/C) compressor due to an internal failure of the old unit, the following procedures must be carried out to remove contamination from the A/C system. Failure to remove contamination from the A/C system, if present, will result in poor A/C performance and/or damage to the new A/C compressor and other components.
- If A/C flushing equipment is available, carry out flushing of the A/C system prior to installing a new A/C compressor.
- If A/C flushing equipment is not available, carry out filtering of the A/C system after a new A/C compressor has been installed.
- Install a new Thermostatic Expansion Valve (TXV), as directed by the A/C flushing or filtering procedure.
- Install a new receiver/drier as directed by the A/C flushing or filtering procedure.

NOTE: Installation of a new receiver/drier is not required when repairing the A/C system, except when there is physical evidence of contamination from a failed A/C compressor or damage to the receiver/drier. Damage to the receiver/drier includes leaks in the receiver/drier, physical damage to the receiver/drier shell or desiccant, or moisture contamination. Moisture contamination results only from a complete loss of refrigerant and equalization of the refrigerant system pressure with atmospheric pressure for a period longer than one hour. If even a slight amount of positive refrigerant pressure is present in the system before repairs are carried out, the receiver/drier should not be replaced.

NOTE: A new A/C compressor may come equipped with an A/C clutch disc and hub, A/C compressor pulley and A/C clutch field coil already installed. If these components are not pre-installed, it will be necessary to transfer these parts from the old A/C compressor to the new compressor prior to installation of the A/C compressor if suitable for reuse.

1. If flushing of the refrigerant system has not been carried out, recover the refrigerant.

2. Remove the compressor-to-condenser discharge line bracket nut.
- To install, tighten to 7 Nm (62 lb-in).


3. Remove the 2 A/C compressor fitting nuts and disconnect the fitting.
- Discard the O-ring seals and gasket seals.

- To install, tighten to 15 Nm (133 lb-in).


4. Remove the accessory drive belt.

5. Disconnect the A/C clutch field coil electrical connector.

6. Detach the wire harness from the A/C compressor wire harness bracket.

7. Remove the 2 A/C compressor bolts, the A/C compressor stud bolt and the A/C compressor wire harness bracket.
- To install, tighten to 24 Nm (18 lb-ft).


8. Remove the A/C compressor.

9. To install, reverse the removal procedure.
- Install new O-ring seals and gasket seals.

- If filtering of the refrigerant system is not to be carried out, add the correct amount of clean PAG oil to the refrigerant system.


10. If filtering of the refrigerant system is not to be carried out, evacuate, leak test and charge the refrigerant system.