Indoor Unit Heat Exchanger IN/OUT Sensor Error — Open or Short circuit

What does HX IN/OUT Sensor Error mean?

This error indicates an issue with the heat exchanger inlet or outlet temperature sensors in the indoor unit. These sensors monitor refrigerant temperatures within the heat exchanger.

• Loose or incorrect connection of the EEV IN/OUT sensor.
• Internal damage to the sensor, causing it to be open or short-circuited.

Click steps to track your progress.

1. 1

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

2. 2

   Inspect the indoor unit for any visible loose connections or damage around the heat exchanger sensor area.

3. 3

   Restore power and restart the unit.

4. 4

   If the error persists, a technician may need to check the sensor's resistance value for shorts or opens.