Air Conditioning

AIR CONDITIONING

The A/C refrigerant system is a clutch cycling orifice tube type. The system components are the:
- A/C compressor.
- A/C compressor clutch.
- condenser core.
- evaporator core.
- suction accumulator.
- connecting refrigerant lines.

The refrigeration system operation is controlled by the:
- evaporator core orifice.
- A/C cycling switch.
- A/C pressure relief valve.
- pressure cutoff switch.

The refrigerant system incorporates an A/C compressor controlled by a A/C cycling switch and high-pressure cutoff switch (refrigerant containment switch). The A/C cycling switch senses low-side refrigerant pressure to control A/C compressor operation and prevent evaporator core freeze-up. The high-pressure cutoff switch senses high-side refrigerant pressure to interrupt A/C compressor operation in the event of excessively high refrigerant pressure.

An A/C pressure relief valve is installed in the compressor manifold and tube assembly (6.0L diesel vehicles), or in the A/C compressor (4.6L 5.4L or 6.8L vehicles) to protect the refrigerant system against excessively high refrigerant pressures.

An evaporator core orifice is installed in the evaporator core inlet tube to meter the liquid refrigerant into the evaporator core.