Ford Mustang (1999-2004) Service Manual: Dual-Function Pressure Switch (4.6L)
The dual-function pressure switch is used to interrupt A/C compressor operation in the event of high system discharge pressures.
- The dual-function pressure switch is mounted on a Schrader valve-type fitting on the high pressure side of the A/C manifold and tube.
- It is not necessary to discharge the refrigerant system to remove the dual-function pressure switch.
- A valve depressor, located inside the threaded end of the dual-function pressure switch, presses on the Schrader valve stem.
- This allows the dual-function pressure switch to monitor the compressor discharge pressure.
- When the compressor discharge pressure rises, the switch contacts open, disengaging the A/C compressor. When the pressure drops, the contacts close to allow operation of the A/C compressor. For specifications regarding operating pressure(s), refer to Section.
The dual-function pressure switch has a second set of electrical contacts used for high-speed cooling fan control.
When the compressor discharge pressure rises, the contacts close and engage the high speed fan control. When the pressure drops, the contacts open and the high speed fan control is disengaged.
Refrigerant Containment Switch (3.8L)
The refrigerant containment switch is used to interrupt A/C compressor operation in the event of high system discharge pressures.
- The refrigerant containment switch is mounted on a Schrader-type valve fitting on the high pressure side of the compressor manifold and tube assembly.
- A valve depressor, located inside the threaded end of the refrigerant containment switch, presses on the Schrader valve stem.
- This allows the refrigerant containment switch to monitor the A/C compressor discharge pressure.
- When the A/C compressor discharge pressure rises, the switch contacts open, disengaging the A/C compressor. When the pressure drops, the contacts close to allow operation of the A/C compressor. For additional information regarding operating pressure(s), refer to Section.
- It is not necessary to discharge the refrigerant system to remove the refrigerant containment switch.
Suction Accumulator
NOTE: Installation of a new suction accumulator is not required when
repairing the air conditioning
system except when there is physical evidence of contamination from a failed A/C
compres ...
Spring Lock Coupling
The spring lock coupling is a refrigerant line coupling held together by a
garter spring inside a circular
cage.
When the coupling is connected together, the flared end of the female
f ...
Other materials:
Crankshaft Front Oil Seal
Special Tool(s)
Crankshaft Seal
Installer/Aligner
303-335 (T88T-6701-A)
Front Cover Seal Remover
303-107 (T74P-6700-A)
Crankshaft Seal Installer
303-635
Crankshaft Damper Replacer
303-102 (T74P-6316-B)
...
Removal
1. Remove the rear defrost connectors if necessary.
2. Remove the nuts retaining the well sling and convertible top tacking
strips.
3. Remove the three tacking strips.
4. Mark the top of the convertible top skin around the top of all three
tacking s ...
Intake Manifold Runner Control (IMRC) Actuator - 3.8L
Removal and Installation
1. Disconnect the battery ground cable. For additional information,
refer to Section.
2. Drain the cooling system. For additional information, refer to
Section.
3. Remove the upper intake manifold. For additional informat ...
