AEG washer shows E90 or E9x codes, machine may not start or may behave erratically

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Incorrect or corrupted configuration in control board, Faulty user interface board, Loose communication cable between boards, Power surge damage

Safety first: Disconnect power for at least 5 minutes to allow a full reset.

Check connections: Remove the top cover and inspect the wiring between the main control board and the user interface (display) board. Re-seat all connectors.
Power reset: Reconnect power and try a short cycle.

If E90 persists, the control board or display board may need reprogramming or replacement by an AEG service technician.

Professional Required 5/5

AEG Main Control Board (ECU)

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