Upper lamp blinks 2 times — Indoor Coil or Room Temperature Thermistor Error

What does Upper lamp blinks 2 times mean?

The upper lamp on the indoor unit blinks twice, indicating an issue with one of the indoor temperature sensors. Either the indoor coil thermistor or the room temperature thermistor is detected as short-circuited or open-circuited.

• Indoor coil thermistor is short-circuited
• Indoor coil thermistor is open-circuited
• Room temperature thermistor is short-circuited
• Room temperature thermistor is open-circuited

Click steps to track your progress.

1. 1

   Turn off the air conditioner at the main power supply breaker.

2. 2

   Wait for at least 30 seconds, then turn the main power supply back on.

3. 3

   Ensure the air filter is clean and not blocking airflow, as this can affect temperature readings.

4. 4

   If the error reappears, contact a qualified service technician, as thermistor inspection and replacement require specialized tools.