High Pressure Safety Valve HVAC: Testing and Inspection

1. Install the manifold gauge set.
2. Start the engine.
3. Turn the tan switch and A/C switch ON.
4. Verify the high-pressure side reading of the manifold gauge.




5. Check for leaks from the pressure relief valve by using a gas leak tester.
6. It not as specified, replace the cooler hose (HI).