A/C Pressure Cutoff Switch
A/C PRESSURE CUTOFF SWITCHThe A/C pressure cutoff switch is used to interrupt the A/C compressor operation in the event of high system discharge pressures.
- The A/C pressure cutoff switch is mounted on a Schrader valve-type fitting on the high pressure side of the A/C manifold and tube.
- A valve depressor, located inside the threaded end of the A/C pressure cutoff switch, presses on the Schrader valve stem.
- This allows the A/C pressure cutoff switch to monitor the compressor discharge pressure.
- When the compressor discharge pressure rises, the switch contacts open and the A/C request signal circuit to the PCM is interrupted. When the pressure drops, the contacts close to complete the A/C request signal circuit to the PCM. For specifications regarding operating pressure(s), Refer to Heating and Air Conditioning.
- It is not necessary to discharge the refrigerant system to remove the A/C pressure cutoff switch.