Upper lamp blinks 14+ times - Other abnormality detected

What does 14-time blink (2.5-second OFF) mean?

The upper operation indicator lamp blinks fourteen or more times with a 2.5-second pause. This indicates an unspecified abnormality, possibly related to indoor thermistors or other system components.

• Abnormality in indoor thermistors (room temp, coil, defrost, ambient)
• Other general system malfunction
• Potential issue with refrigerant circuit

Click steps to track your progress.

1. 1

   Check stop valve and 4-way valve.

2. 2

   Refer to the service manual's test point diagrams for thermistor characteristics.

3. 3

   Use the failure mode recall function on the outdoor unit for detailed diagnosis.