Refrigerant Pressure Sensor / Switch: Testing and Inspection

1. Connect a suitable refrigerant pressure gauge to high pressure port of A/C system.
2. Connect continuity tester to A/C system high pressure switch terminals.
3. Start engine and engage A/C system.
4. Observe A/C pressure gauge and continuity tester. Circuit should close when pressure rises above 205-252 psi.
5. Circuit should open when pressure drops below 170-218 psi.