F25 (13 LED flashes) - Exhaust temperature sensor failure

What does F25 mean?

The outdoor unit's LED1 flashes thirteen times, indicating a failure with the exhaust temperature sensor in the outdoor unit.

• Faulty exhaust temperature sensor
• Loose connection of the sensor wiring
• Damaged wiring to the sensor
• Outdoor unit PCB issue

Click steps to track your progress.

1. 1

   Turn off the AC unit at the main power supply and wait 15 minutes, then restart it.

2. 2

   Ensure there are no obstructions affecting the outdoor unit's exhaust.

3. 3

   If the error persists, contact a qualified technician to inspect or replace the sensor.