High Pressure Relief Valve

WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.

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 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. On the TRS-090 A/C compressor, the relief valve is serviced only as a part of the compressor assembly. On the HS-15 A/C compressor, the relief valve is serviced as a part of the compressor manifold.