Fluorescent Dye Detection: Notes

NOTE: Ford Motor Company vehicles are produced with R-134a fluorescent dye installed in the refrigerant system from the factory. The location of leaks can be pinpointed by the bright yellow-green glow of the fluorescent dye under a UV lamp. Since more than one leak can exist, make sure to inspect each component, line and fitting in the refrigerant system for a leak.

Check for leaks using a Rotunda-approved UV lamp.
- Inspect all components, lines and fittings of the refrigerant system.
  
  Fig 1: Checking R-134A Fluorescent Dye Leakage Using Rotunda-Approved UV Lamp
  Courtesy of FORD MOTOR CO.
If a leak is found, recover the refrigerant. For additional information, refer to AIR CONDITIONING (A/C) SYSTEM RECOVERY, EVACUATION AND CHARGING .
Repair the refrigerant system leak(s).
Evacuate and charge the refrigerant system. For additional information, refer to AIR CONDITIONING (A/C) SYSTEM RECOVERY, EVACUATION AND CHARGING .
After the leak(s) is repaired, remove any traces of fluorescent dye with a general purpose oil solvent.
Verify the repair by running the vehicle for a short period of time and rechecking the area of the leak with a Rotunda-approved UV lamp.

Fig 2: Checking R-134A Fluorescent Dye Leakage Using Rotunda-Approved UV Lamp
Courtesy of FORD MOTOR CO.