Ford 2003 Mustang Workshop Manual

2003 Mustang Workshop Manual

SECTION 412-03: Air Conditioning

DESCRIPTION AND OPERATION
Air Conditioning Printable View (225 KB)
The A/C refrigerant system is a clutch cycling orifice tube type. The system components are:
A/C compressor (19703)

A/C clutch (2884)

A/C condenser core (19712)

A/C evaporator core (19860)

suction accumulator (19C836)

connecting refrigerant lines

The refrigeration system operation is controlled by the:
A/C evaporator core orifice (19D990).

A/C cycling switch (19E561).

A/C compressor pressure relief valve (19D644).

Refrigerant containment switch (3.8L) (19D594).

Dual-function pressure switch (4.6L) (19D594).

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 (19D734) to protect the refrigerant system against excessively high refrigerant
pressures.
An evaporator core orifice is installed in the A/C evaporator core inlet tube to meter the liquid refrigerant into the A/C evaporator core.
A refrigerant containment switch is installed on 3.8L vehicles to cut-off A/C compressor operation in the event of abnormally high refrigerant system pressure.
A dual-function pressure switch is used on 4.6L vehicles for cooling fan control, and to cut-off A/C compressor operation in the event of abnormally high refrigerant
system pressure.

Refrigeration System Components

Item Part Number
1 19E561 A/C cycling switch
2 19D701 A/C charge port valve (low side)
3 19D594 Refrigerant containment switch (3.8L vehicles)
3 19D594 Dual-function pressure switch (4.6L vehicles)
4 19D734 A/C manifold and tube
5 19D644 A/C compressor pressure relief valve
6 19703 A/C compressor
7 19D701 A/C charge port valve (high side)
8 19712 A/C condenser core
9 19835 Condenser to evaporator tube
10 19C836 Suction accumulator
11 — A/C evaporator core (part of 19850 assembly)

A/C Compressor and Clutch Assembly

http://www.fordtechservice.dealerconnection.com/pubs/content/~WS3B/~MUS~LEN/19/S...
Description
Page 1 of 6
2003 Mustang Workshop Manual
Procedure revision date: 06/14/2002
4/29/2009