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Only use refrigerant in gas form when filling the system through the low-pressure connection. Only use refrigerant in liquid form when filling the system through the high-pressure connection. Refrigerant attacks certain plastics. Only use seals suitable for refrigerant. If the air conditioning (A/C) compressor is damaged, the fixed orifice tube can become blocked with metal particles. Any sort of blockage in the refrigerant circuit will damage the air conditioning (A/C) compressor irreparably. If the air conditioning (A/C) system has been opened for a period greater than 2 hours, a new receiver drier must be installed and the evacuating time to be increased by |