Fluorescent Dye Detection

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Vehicles are manufactured 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 an approved UV lamp.
- Inspect all the components, lines and fittings of the refrigerant system.
  
  Fig 1: Checking For Leaks 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/are 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 an approved UV lamp.

Fig 2: Checking For Leaks Using Rotunda-Approved UV Lamp
Courtesy of FORD MOTOR CO.