Refrigerant Pressure Sensor / Switch: Description and Operation
SYSTEM OPERATIONA/C Pressure Transducer
The switch is located on the discharge line near the compressor. The pressure transducer functions as the refrigerant system pressure sensor. It supports the condenser/radiator fans and compressor functions.
The A/C Pressure Transducer functions as the refrigerant system pressure sensor. It supports the condenser/radiator fans and compressor functions. The pressure transducer is screwed attached to a valve on the discharge line near the compressor.
The Powertrain Control Module (PCM) monitors the A/C compressor discharge (high side) pressure through the air conditioning pressure transducer. The transducer supplies an input to the PCM. The PCM engages the A/C compressor clutch if pressure is sufficient for A/C system operation.