E20 appears; machine reports generic system fault and may lock out all functions.

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

Corrupted firmware, Multiple unresolved sensor errors, Internal memory fault on PCB, Incompatible replacement board

Safety: Disconnect from mains before any internal work.

Full reset: Unplug the machine for at least 30 minutes. Reconnect and attempt to enter any service or diagnostic mode as described in the AEG service documentation.
Check for prior errors: If E20 followed other specific errors (e.g., E03, E07), resolve those hardware issues first.
Firmware update: If supported, have an authorized AEG technician reflash or update the firmware on the main PCB.
Replace PCB: If firmware cannot be recovered, the main control board may need replacement.

Professional Required 5/5

Main Control Board

Check Price on Amazon

We may earn a commission from links on this page.