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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 993 (Heater & Air Conditioning System) >> Function Diagnosis >> Refrigeration System >> With Monochrome Display >> WITH MONOCHROME DISPLAY: System Description >> Pressure Relief Valve

Pressure Relief Valve

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor. When the pressure of refrigerant in the system increases to an abnormal level [more than 3,600 kPa (36.7 kg/cm2 , 522 psi)], the release port on the pressure relief valve automatically opens and releases refrigerant into the atmosphere.

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