Air Conditioning - Escape, Mariner: Notes

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. 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 consists of the following components:

A/C compressor
A/C clutch
A/C condenser core
A/C evaporator core
A/C charge port valve (high side)
A/C charge port valve (low side)
Connecting refrigerant lines
Function selector switch
Suction accumulator

The refrigerant system operation is controlled by the following:

A/C evaporator core orifice
A/C cycling switch
A/C compressor pressure relief valve
A/C pressure cutoff switch
A/C clutch relay
Powertrain control module (PCM)

The refrigerant system incorporates an A/C compressor controlled by an A/C cycling switch.

The A/C cycling switch senses A/C evaporator core pressure to control A/C compressor operation.

An A/C compressor pressure relief valve is installed in the A/C manifold and tube assembly (3.0L (4V) engine), on the discharge port of the A/C compressor (2.3L engine) to protect the refrigerant system against excessively high refrigerant pressures.

An A/C evaporator core orifice is installed in the condenser-to-evaporator line to meter the liquid and vapor mixture refrigerant into the A/C evaporator core.