1. | Recover the refrigerant with a recovery/recycling/charging station. |
2. | Remove the relief valve (A) and the O-ring (B). Plug the opening to keep foreign matter from entering the system and the compressor oil from running out.
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3. | Clean the mating surfaces. |
4. | Replace the O-ring with a new one at the relief valve, and apply a thin coat of refrigerant oil before installing it. |
5. | Remove the plug, and install and tighten the relief valve. |
6. | Charge the system. |