G 30 Van V8-454 7.4L VIN J SFI (1996)
Refrigerant Pressure Sensor / Switch: Description and Operation
A/C Low Pressure Switch
LOW REFRIGERANT PRESSURE SWITCH
The low refrigerant pressure switch is located in the low pressure refrigerant line. When pressurized, the switch is closed and allows the compressor
clutch relay to energize, feeding battery voltage to the compressor clutch coil. If the pressure drops below 2 psi, the switch opens and cuts off voltage to
the clutch. There is a circuit to the Air Conditioning Programmer (ACM) which monitors the state of the switch for diagnostic purposes.
