Air Conditioning: Notes

WARNING: This page is about a different car, the 2004 Ford RV Cutaway, 2004 Ford Econoline, 2004 Ford E450 Super Duty, and 2004 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

The A/C refrigerant system is a clutch cycling orifice tube type. The system components are:

A/C compressor (19703)
A/C clutch
Condenser core (19712)
Evaporator core (19860)
Suction accumulator (19C836)
Connecting refrigerant lines

The refrigeration system operation is controlled by the:

Evaporator core orifice (19D990).
A/C cycling switch (19E561).
A/C pressure relief valve (19D644).
Pressure cutoff switch (19D594).

The refrigerant system incorporates and A/C compressor controlled by an A/C cycling switch and refrigerant containment switch (high-pressure cutoff switch). The A/C cycling switch senses low-side refrigerant pressure to control A/C compressor operation and prevent evaporator core freeze up. The refrigerant containment 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 (19D734) 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.