Ranger 2WD V6-245 4.0L VIN X SFI (1997)
Refrigerant Pressure Sensor / Switch: Description and Operation
A/C Pressure Cutoff Switch
A refrigerant A/C pressure cut-off switch is used on all models with air conditioning to interrupt A/C compressor operation in the event of high system
discharge pressures which could result in loss of refrigerant charge. The switch is located in the discharge line between the A/C compressor and the A/C
condenser core. The switch is sensitive to the discharge pressure and functions to interrupt the A/C compressor operation if the discharge pressure
exceeds a setting of 2751-3068 kPa (399-445 psi). The switch is a single function switch which only controls the circuit to the A/C cycling switch.
