Safety: Disconnect the freezer from mains before any inspection.

Basic actions:

1. Power reset: Unplug for 15–20 minutes to allow capacitors to discharge, then reconnect. If E9 clears and does not return, it may have been a transient glitch.
2. Check supply voltage: Ensure the wall outlet provides stable voltage within the specified range. Avoid extension leads or multi-way adaptors.
3. Inspect PCB: Access the main control board (usually at the rear or in a top compartment). Look for burnt tracks, bulged capacitors, or obvious damage.
4. Check connected loads: Disconnect non-essential loads (e.g., fan, heater) one at a time (with power off) and see if E9 changes when powered again. This can help identify a shorted peripheral.
5. Replace PCB: If the board shows visible damage or E9 persists regardless of load disconnection, replace the main control board with the correct AEG part.

Warning: Live testing and board replacement should be performed by qualified personnel to avoid electric shock and further damage.

Freezer displays E9 and may shut down or run erratically

Possible Causes