Refrigerant Pressure Sensor / Switch: Testing and Inspection

A/C Dual Pressure Switch

1. Turn ignition switch OFF.
2. Connect manifold gauge set and measure high-pressure side refrigerant pressure.

High-pressure side: 28.5 - 455 psi

3. If not as specified, check refrigerant system, referring to troubleshooting guide.
4. If correct, go to next step.
5. Disconnect A/C dual pressure switch connector.




6. Check for continuity of switch.




7. If not as specified, replace switch.







NOTE: The dual pressure switch shut off the magnetic clutch to protect the air condition system when the pressure of refrigerant is over 455 ± 28.5 psi or below 28.5 ± 2.8 psi