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Fluorescent Dye Detection

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 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.
  1. Check for leaks using an approved UV lamp.
    • Inspect all the components, lines and fittings of the refrigerant system.
    2. Fig 1: Checking For Leaks Using Rotunda-Approved UV Lamp
    G03890017Courtesy of FORD MOTOR CO.
  2. If a leak is found, recover the refrigerant. For additional information, refer to Air Conditioning (A/C) System Recovery, Evacuation and Charging.
  3. Repair the refrigerant system leak(s).
  4. Evacuate and charge the refrigerant system. For additional information, refer to Air Conditioning (A/C) System Recovery, Evacuation and Charging.
  5. After the leak(s) is/are repaired, remove any traces of fluorescent dye with a general purpose oil solvent.
  6. 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.
    7. Fig 2: Checking For Leaks Using Rotunda-Approved UV Lamp
    G03890017Courtesy of FORD MOTOR CO.
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