Operating Logic Test (Manual only)

Inspect the PTC operation with the confirmation logic below:

1. Entering
   1. Set the Floor mode and maximum heating position.
   2. Turn off the blower switch.
   3. Press the intake (recirculation) button continually 5 seconds more.
   4. The intake and A/C button indicator will continuously flash with an interval of 0.5 seconds.
   5. Confirm the PTC operation by turning on the blower switch after 3 seconds.
   6. The logic test will automatically cancelled after 30 seconds.

      In addition, it can be cancelled by doing the followings:

      • Select A/C or intake (recirculation) switch
      • Ignition switch OFF
2. Cancellation
   • Select A/C or intake (recirculation) switch.
   • Turn the ignition switch OFF.
   • The test cancels automatically after 30 seconds.
3. If the PTC does not operate, substitute with a known-good PTC heater and check for proper operation.

   If the problem is corrected, replace the PTC heater.