Internally Controlled Variable Displacement A/C Compressor (2.0L/2.3L EcoBoost)
NOTE:
Proper Air Conditioning (A/C) system diagnosis on a vehicle's compressor is dependent on correct refrigerant system charge and tested in ambient temperatures above 21.1°C (70°F).
The internally controlled variable displacement compressor has:
- a non-serviceable shaft seal.
- a non-serviceable pressure relief valve installed in the rear of the compressor to protect the refrigerant system against excessively high refrigerant pressures.
- Refer to SPECIFICATIONS for the appropriate refrigerant and refrigerant oil. This oil contains special additives required for the A/C compressor. The oil may have some slightly dark-colored streaks while maintaining normal oil viscosity. This is normal for this A/C compressor because of break-in wear that can discolor the oil.
Variable displacement compressors have a swash plate that rotates to reciprocate pistons, which compresses refrigerant. Variable displacement compressors change the swash plate angle to change the refrigerant displacement. The internally controlled variable displacement A/C compressor changes the swash plate angle using an internal valve, springs and linkage, controlled with refrigerant pressure in the compressor housing, to change the displacement of the A/C compressor.