Left/Upper lamp blinks 2 times with a 2.5-second pause — Indoor coil or room temperature sensor fault

What does Left/Upper lamp blinks 2-time blink, 2.5-second OFF mean?

The indoor coil temperature thermistor or the room temperature thermistor has a short or open circuit. The unit may not operate correctly.

• Indoor coil thermistor short or open circuit
• Room temperature thermistor short or open circuit

Click steps to track your progress.

1. 1

   Check the characteristics of the indoor coil thermistor and room temperature thermistor as described in section 10-7.

2. 2

   Inspect the thermistor wiring for any damage or loose connections.

3. 3

   If a thermistor is found to be faulty, it may need replacement.