Impreza Sedan AWD F4-1820cc 1.8L SOHC (1993)
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Refrigerant Pressure Sensor / Switch: Testing and Inspection
Pressure Switch (Dual Switch)
1. Remove cap from high-pressure line service valve, and connect gauge manifold to service valve.
2. Disconnect pressure switch harness connector, and check pressure switch for proper ON-OFF operation. Use a circuit tester.