Washer-dryer will not start or stops with E23, often after a leak or during drain phase.

Safety: Unplug the appliance and ensure the base is dry before accessing electronics.

• Inspect pump and wiring: Access the drain pump from the rear or bottom. Check the connector and wiring harness for burns, melted insulation, or corrosion. Repair or replace damaged wiring.
• Test pump resistance: Measure the pump coil with a multimeter. A very low resistance (near short) or zero indicates a shorted pump that must be replaced.
• Check for leaks: Look for signs of water ingress near the control board and pump area. Fix any leaks before replacing electronics.
• Evaluate control board: If the pump tests good but E23 persists, the pump driver circuit (triac) on the AEG main PCB is likely damaged. Replacement or professional board repair is required.

Because this fault involves mains-voltage electronics, if you are not experienced with electrical repairs, contact an authorized AEG service technician.