Express 3/4 Ton Van V8-5.7L VIN R (1998)
Refrigerant Pressure Sensor / Switch: Description and Operation
High Pressure Cut-Off Switch
The system is equipped with a high pressure cutoff switch. This switch normally closes at 1035-1379 kPa (150-200psi), and opens at 2827-3103 kPa
(410-450 psi) to interrupt the voltage to the compressor clutch coil. This stops the compressor from cycling and prevents the pressure relief valve from
discharging refrigerant and oil.
