Fluorescent Leak Detector

Fluorescent dye will assist in locating any leaks in the A/C system.

IMPORTANT: PAG oil is water soluble.
• Condensation on the evaporator core or the refrigerant lines may wash the PAG oil and fluorescent dye away from the actual leak. Condensation may also carry dye through the HVAC module drain.
• Leaks in the A/C system will be indicated in a light green or yellow color when using the leak detection lamp.

  Use the leak detection lamp in the following areas:

  • All fittings or connections that use seal washers or O-rings
  • All of the A/C components
  • The A/C compressor shaft seal
  • The A/C hoses and pressure switches
  • The HVAC module drain tube, if the evaporator core is suspected of leaking
  • The service port sealing caps

    The sealing cap is the primary seal for the service ports.

• Follow the instructions supplied with the J 42220  . See Special Tools .
• To prevent false diagnosis in the future, thoroughly clean the residual dye from any area where leaks were found. Clean any refrigerant dye on components with brake and choke cleaner, Saturn P/N 21007432.
• If any refrigerant dye contacts an exterior paint surface, remove it by performing the following steps:
  • Carefully wash affected surfaces according to the Saturn Owner's Handbook to remove any dirt and to ensure that paint is not scratched during dye removal.
  • Mix water and isopropyl alcohol to obtain 50/50 mixture. Soak a soft 100 percent cotton cloth towel with the solution and wet down the affected areas to remove dye.
  • After dye has been removed, wash affected areas and inspect to make sure that the dye has been removed.