Indoor unit shows E2 and stops; unit may start then shut down after a short time, often during cooling.

Safety: Isolate power at the breaker before opening the indoor unit.

• Remove front cover and filters: Open the front panel, remove filters, and locate the evaporator coil (aluminium fins).
• Find the coil sensor: Look for a small probe or clip-on sensor attached to the evaporator coil, usually near the middle or outlet side, with two wires going to the PCB.
• Check mounting: Ensure the sensor is firmly clipped or inserted into the coil. If it has fallen away, reattach it securely in its original position.
• Inspect wiring: Follow the sensor wires back to the PCB. Check for cuts, pinches, or insulation damage. Reseat the connector on the PCB.
• Test sensor (if possible): With a multimeter, measure resistance at room temperature and compare with service data if available. A reading of open circuit or near zero indicates failure.
• Replace sensor if defective: Order an AEG evaporator temperature sensor (NTC) matched to your model. Install in the same location and route wiring away from sharp metal edges.
• If E2 remains after sensor replacement: The indoor PCB may be faulty and should be diagnosed and replaced by a professional.