Refrigerant Pressure Sensor / Switch: Testing and Inspection
A/C Refrigerant (Triple) Pressure Switch InspectionA/C control pressure switch
1. Run engine and A/C switch ON.
2. Check continuity between "a" and "b" terminals of A/C refrigerant pressure switch in normal A/C condition.
If no continuity, replace A/C refrigerant pressure switch.
A/C Condenser Cooling Fan Control Pressure Switch
1. Connect manifold gauge set to charging valve.
2. Run engine and A/C switch ON.
3. Check continuity and no continuity between "c" and "d" terminals of A/C refrigerant pressure switch according to A/C refrigerant pressure as shown.
If operation is not as specified, replace A/C refrigerant pressure switch.
Triple pressure switch specifications
"A": Approx. 177 kPa (1.77 kg/sq.cm, 25.5 psi)
"B": Approx. 206 kPa (2.06 kg/sq.cm, 29.5 psi)
"C": Approx. 590 kPa (5.90 kg/sq.cm, 84.0 psi)
"D": Approx. 2940 kPa (29.40 kg/sq.cm, 418.0 psi)
"E": Approx. 1080 kPa (10.80 kg/sq.cm, 153.5 psi)
"F": Approx. 1470 kPa (14.70 kg/sq.cm, 209.0 psi)