Recover the refrigerant with a recovery/recycling/charging station. Remove the relief valve (A), and the O-ring (B). Plug the opening to keep foreign matter from entering the system and the A/C compressor oil from running out. Clean the mating surfaces. Install a new O-ring on the relief valve, and apply a thin coat of refrigerant oil to the O-ring. Remove the plug, and install and tighten the relief valve. Charge the system. |