E4 — Indoor return air temperature sensor error

Was bedeutet E4 ?

The indoor unit's return air temperature sensor (T1) is malfunctioning. This sensor measures the temperature of the air entering the indoor unit.

• Faulty return air temperature sensor
• Loose or damaged wiring to the sensor
• Issue with the indoor unit's control board

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   Ensure the sensor is not obstructed by dust or debris.

2. 2

   Check the wiring and connections of the return air temperature sensor.

3. 3

   If the sensor is suspected to be faulty, it may need replacement.

4. 4

   If the wiring is intact, the indoor unit's main control board might be the cause.