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Home >> Tesla >> 2012 >> Model S >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Cooling Systems >> HVAC, Thermal Management -- Model S >> Refrigerant System >> A/C Refrigerant Leak Detection >> System Testing
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System Testing

  1. On the touchscreen, set the temperature to LO  on both the driver and passenger controls.
  2. Run the A/C system for 10 minutes to allow the dye to circulate.
  3. Using an ultraviolet (UV) or blue light, examine all A/C lines for leaks.
    NOTE: Leaks glow a bright yellow-green.
  4. Once the leak is located, recover refrigerant from the vehicle, refer to A/C Refrigerant Recovery And Recharge (Remove And Replace) .
  5. Replace the defective component(s).
    NOTE: Also replace the desiccant bag, as the A/C system has experienced a leak. See Receiver Dryer And Desiccant (Remove And Replace) .
  6. Recharge the vehicle with refrigerant, refer to A/C Refrigerant Recovery And Recharge (Remove And Replace) .
    CAUTION: If a component was replaced, additional oil must be added to the system. See the end of the "Recover Refrigerant and Verify Charge" section for more information.
  7. Use a general-purpose cleaner to clean off all dye residue. This prevents leftover residue from being mistake for a leak in future repairs. Confirm that all residue is removed by inspecting all A/C lines with a UV or blue light.
  8. Run the A/C system with the temperature set to LO  . Inspect all A/C lines with a UV or blue light to verify repairs.
  9. Fill out the Tracerline dye label and place it next to the A/C refrigerant label on the right underhood apron to inform future technicians that dye has been added to the A/C system.
  10. Reinstall all components that were removed for access.
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