Navigator 2WD V8-5.4L DOHC VIN R (2001)
Refrigerant Pressure Sensor / Switch: Description and Operation
Air Conditioning High Pressure Switch
Typical Air Conditioning Pressure Sensor
The A/C pressure cutoff switch is used to interrupt A/C compressor operation in the event of high system discharge pressures.
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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.
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A valve depressor, located inside the threaded end of the A/C pressure cutoff switch, presses on the Schrader valve stem.
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This allows the A/C pressure cutoff switch to monitor the compressor discharge pressure.
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When the 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 A/C pressure cutoff switch.
