On this Chrysler product they have an A/C Transducer located on the
high pressure hose. The switch has three wires. They also have a thermo sensor located
at the evaporator case behind the glove compartment. These two
things are the only ones thatA jump in the system is only removing protection the system has.
So it will damage your compressor or hoses. Find the
compressor follow the high hose to the high pressure switch
(transducer) it has three wires. Check under the dash by the
glove box and you will see a round platick lid on the case with two
wires that is your thermostat (thermo sensor).
control the compressor.
The A/C clutch is controlled by the A/C cycling switch (19E561) and the
A/C pressure cut-off switch, which are connected in series. The A/C
cycling switch is mounted on the suction accumulator/drier (19C836),
and the A/C pressure cut-off switch is mounted in the discharge line at
the A/C condenser.
The A/C cycling switch closes when the pressure on the low side of the
system reaches approximately 276-324 kPa (40-47 psi). The A/C cycling
switch opens when the pressure drops to approximately 163-175 kPa
(23.5-25.5 psi), disengaging the A/C clutch. In ambient temperatures
below -1° C (30° F), the A/C cycling switch will not allow
compressor operation because of low system pressures.
The A/C pressure cut-off switch is used to interrupt A/C clutch
operation in the event of high system discharge pressures. The A/C
pressure cut-off switch is a single-function switch that controls A/C
clutch engagement. When compressor head pressures rise to approximately
2896 kPa (420 psi), the contacts open, disengaging the A/C clutch. When
the pressures drop to approximately 1724 kPa (250 psi), the contacts
close to allow A/C clutch operation.
This problem can be caused by low refrigerant charge. Check with a manifold gauge set and temperature pressure chart.
The cycling switch is replaceable and there is a Schrader valve on the
accumulator port so you do not lose your system charge when replacing.
It screws on/off. It is available at any auto parts store
It protects the compressor from low pressure which can be caused by a
loss of refrigerant and subsequent lack of lubrication and prevents
evaporator freeze up. Replace the switch. It is about $10. The high
presure switch is about $25.