Compressor HVAC: Description and Operation

A/C Compressor

NOTE: The A/C compressor internal components are not serviced separately. The A/C compressor is serviced only as an assembly.

The A/C compressor has the following characteristics:
- A variable capacity function controlled by an external solenoid.
- A displacement capacity of 160cc.
- The compressor is clutchless.
- The compressor operates all the time (from 2% to 100% while the engine is running).

A/C Compressor Pressure Relief Valve
An A/C compressor pressure relief valve is incorporated in the compressor to:
- relieve unusually high refrigerant system discharge pressure buildups.
- prevent damage to the A/C compressor and other system components.
- avoid total refrigerant loss by closing after the excessive pressure has been relieved.