Fluorescent Leak Detection

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

• Condensation on the evaporator core or the refrigerant lines may wash the compressor oil and fluorescent dye away from the actual leak. Condensation may also carry dye through the Heating Ventilation and Air Conditioning (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 GE-42220  Leak Detection Lamp.
• To prevent false diagnosis in the future, thoroughly clean the residual dye from any area where leaks were found. Use a rag and the approved GE-43872  Dye Cleaner.