Pressure Relief Valve

WARNING: This page is about a different car, the 1999 Lincoln Navigator and 1999 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

Pressure relief valve relieves high-side pressure build-up above 420 psi (29.5 kg/cm² ), and prevents damage to A/C compressor and other system components. Pressure relief valve is located on side of high-pressure line, near compressor manifold.

Fig 1: Identifying Automatic A/C-Heater System Electronic Components

Courtesy of FORD MOTOR CO.