A/C Pressure Sensor
WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
The PCM monitors the refrigerant system high-side pressure through the A/C pressure sensor.
- A valve depressor, located inside the threaded end of the A/C pressure sensor, presses a Schrader valve stem on the compressor discharge line portion of the compressor-to-condenser discharge line.
- The A/C pressure sensor provides a voltage that is proportional to the A/C compressor discharge pressure, which allows for the A/C compressor discharge pressure to be monitored by the PCM.
- The PCM uses this information for A/C clutch control, cooling fan control and idle speed.
- It is not necessary to recover the refrigerant to remove the A/C pressure sensor.