C 1500 Truck 2WD V8-6.5L DSL Turbo VIN F (1998)
High Pressure Safety Valve HVAC: Description and Operation
High Pressure Relief Valve
The compressor is equipped with 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. To prevent refrigerant loss or
compressor damage, the high pressure cutoff switch opens automatically at approximately 3036 kPa (440 psi). When the switch opens, current to the
compressor clutch is interrupted. Any condition that causes the switch to open will keep the compressor from operating.
