Econoline E150 1/2 Ton V8-4.6L SOHC VIN W (2001)
Refrigerant Pressure Sensor / Switch: Description and Operation
Air Conditioning High Pressure Switch
The pressure cutoff switch is used to interrupt A/C compressor operation in the event of high system discharge pressures.
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The pressure cutoff switch is mounted on a Schrader valve-type fitting on the high pressure side.
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A valve depressor, located inside the threaded end of the pressure cutoff switch, presses on the Schrader valve stem.
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This allows the pressure cutoff switch to monitor the compressor discharge pressure.
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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.
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It is not necessary to discharge the refrigerant system to remove the pressure cutoff switch.
