16-time blink 2.5 seconds OFF — 4-way valve or pipe temperature issue

What does 16-time blink 2.5 seconds OFF mean?

The outdoor unit LED blinks 16 times with a 2.5-second pause. This indicates that the 4-way valve is not working correctly, or the indoor coil thermistor has detected an abnormal temperature.

• 4-way valve malfunction
• Indoor coil thermistor reading abnormal temperatures
• Inverter P.C. board defect

Click steps to track your progress.

1. 1

   Turn off the power to the unit at the circuit breaker for several minutes.

2. 2

   Restore power and try to operate the air conditioner in both cooling and heating modes.

3. 3

   If the issue remains, the 4-way valve or inverter P.C. board may need to be checked or replaced by a qualified technician.