Pressure Cutoff Switch
WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. 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 compressor operation 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.
- 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 A/C compressor discharge pressure rises, the switch contacts open, disengaging the A/C compressor. When the pressure drops, the contacts close to allow operation of the A/C compressor. For additional information 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.