Pressure Cutoff Switch
WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
The pressure cutoff switch is used to interrupt A/C demand signal to the PCM in the event of high system discharge pressures.
- The pressure cutoff switch is mounted on a Schrader valve-type fitting on the high-pressure side of the compressor manifold and tube assembly (3.0L and 4.0L engines) or the compressor to condenser discharge line (19972) (2.3L engine only).
- A valve depressor, located inside the threaded end of the pressure cutoff switch, presses on the Schrader valve stem.
- This allows the pressure cutoff switch to monitor the compressor discharge pressure.
- When the compressor discharge pressure rises the switch contacts open, interrupting the A/C demand signal to the PCM. When the pressure drops the contacts close to complete the A/C demand signal to the PCM. For specifications regarding operating pressure(s), refer to CLIMATE CONTROL SYSTEM-GENERAL INFORMATION .
- It is not necessary to discharge the refrigerant system to remove the pressure cutoff switch.