Regal V6-3.8L SC VIN 1 (1998)
Refrigerant Pressure Sensor / Switch: Description and Operation
An electronic A/C refrigerant pressure sensor is mounted to the line (between the condenser and the evaporator). The output to the PCM is variable and
is dependent upon pressure inside the line. A higher pressure results in a higher voltage out. The PCM constantly monitors A/C system pressure to:
1. Disengage the A/C clutch if the pressures are too high, above 2700 kPa (440 psi.).
2. Disengage the A/C clutch if pressures are too low, below 285 kPa (38 psi.).
3. Boost idle air control to compensate for A/C load at idle.
4. Control cooling fan operation. The pressure sensor is not repairable, if it fails, it must be replaced.
