Town & Country V6-3.8L VIN L (2006)
High Pressure Safety Valve HVAC: Description and Operation
A high pressure relief valve is located on the rear of the A/C compressor. This mechanical valve is designed to vent refrigerant from the A/C system to
protect against damage to the compressor and other system components, caused by condenser air flow restriction or an overcharge of refrigerant.
The high pressure relief valve vents refrigerant from the A/C system when a discharge pressure of 3445 to 4135 kPa (500 to 600 psi) or above is
reached. The relief valve closes when a minimum discharge pressure of 2756 kPa (400 psi) is reached.
The high pressure relief valve vents only enough refrigerant to reduce the A/C system pressure, and then re-seats itself. The majority of the refrigerant is
conserved in the A/C system. If the relief valve vents refrigerant, it does not necessarily mean that the valve is faulty.
The high pressure relief valve is a factory-calibrated unit. The relief valve cannot be adjusted or repaired, and must not be removed or otherwise
disturbed. The relief valve is only serviced as a part of the A/C compressor assembly.