Refrigerant System Dye

A fluorescent refrigerant system dye wafer is added to the receiver-drier desiccant bag at the factory to assist in refrigerant system leak diagnosis using a Rotunda-approved UV  blacklight. This fluorescent dye wafer dissolves after about 30 minutes of continuous A/C  operation. 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.