Express 1/2 Ton Van V6-4.3L VIN W (1999)
High Pressure Safety Valve HVAC: Description and Operation
HIGH PRESSURE RELIEF VALVE
The compressor has a pressure relief valve as a safety factor. Under certain conditions, the refrigerant on the discharge side may exceed the designed
operating pressure. Exceeding this pressure limit may cause refrigerant loss out of the pressure relief valve. In order to prevent refrigerant loss or
compressor damage, the valve opens automatically at approximately 3171-4137 kPa (460-600 psi). Correct any condition that causes the valve to
open. Replace the refrigerant as necessary.
