Fluorescent Dye Detection

WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.

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 For Leaks Using 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 a Rotunda-approved UV lamp.

Fig 2: Checking Area For Leak With UV Lamp

Courtesy of FORD MOTOR CO.