Refrigerant System Dye

Air Conditioning

Refrigerant System Dye

NOTICE: Fluorescent refrigerant system dye mixed with PAG oil should never be added to hybrid vehicle Air Conditioning (A/C) systems equipped with an electric Air Conditioning (A/C) compressor. Addition of fluorescent refrigerant system dye containing PAG oil will damage the electric A/C compressor and contaminate the refrigerant system.

Fluorescent refrigerant system dye is added to the refrigerant system at the factory to assist in refrigerant system leak diagnosis using a Rotunda-approved ultraviolet blacklight. It is not necessary to add additional dye to the refrigerant system before diagnosing leaks, even if a significant amount of refrigerant has been removed from the system. Replacement receiver/driers are shipped with a fluorescent dye "wafer" included in the desiccant cartridge, which will dissolve after approximately 30 minutes of continued A/C operation. It is not necessary to add dye after flushing or filtering the refrigerant system because a new receiver/drier is installed as part of the flushing or filtering procedure. Additional refrigerant system dye should only be added if more than 50 percent of the refrigerant system lubricant capacity has been lost due to a fitting separation or hose rupture.

For hybrid vehicles equipped with an electric compressor, additional refrigerant system dye should only be added by installing a new receiver/drier. Replacement receiver/driers include a fluorescent dye "wafer" which will dissolve after approximately one hour of continued A/C operation. Fluorescent refrigerant system dye mixed with PAG oil should never be used in hybrid vehicles with an electric A/C compressor.