When Replacing Parts On A/C System
- Never open or loosen a connection before discharging the system.
- Seal the open fittings of components with a cap or plug immediately to prevent intrusion of moisture or dust.
- Do not remove the sealing caps from a replacement component until it is ready to be installed.
- Before connecting an open fitting, always install a new sealing ring. Coat the fitting and seal with refrigerant oil before making the connection.
- The air conditioning evaporator (cooling coil) shall never be repaired or replaced with one removed from a used or salvaged vehicle and that new replacement A/C evaporators shall be certified (and labeled) as meeting SAE Standard J2842.
- In the case of all vehicles being serviced and identified as having a leaking evaporator, the leak shall not be repaired and the system shall only be serviced by replacing the leaking evaporator with a new evaporator meeting SAE J2842 requirements. An evaporator from a salvaged vehicle air conditioning system shall not be repaired or removed from any vehicle air conditioning system with the intention of using it again in the same or a different vehicle. However, if the evaporator assembly includes a refrigerant control device (TXV/Block valve) and is operational, re-use of the refrigerant control device is permitted.