Upper lamp blinks 6 times - Outdoor thermistor issue

What does 6-time blink (2.5-second OFF) mean?

The upper operation indicator lamp blinks six times with a 2.5-second pause. This indicates that one or more thermistors in the outdoor unit have a short or open circuit during compressor operation.

• Outdoor unit thermistor short circuit
• Outdoor unit thermistor open circuit
• Wiring issues to outdoor thermistors

Click steps to track your progress.

1. 1

   Refer to the 'Check of outdoor thermistor' section.

2. 2

   Consult the outdoor unit service manual for detailed checks.

3. 3

   Inspect wiring and connections to outdoor thermistors.