Washer stops with E09; drum may be full of water and door remains locked.

Safety first: Unplug the washer. If the door is locked with water inside, drain manually via the pump filter before moving the machine.

Step-by-step checks:

• Check for obvious shorts: Inspect the drain pump, inlet valves, and motor for visible damage or burnt smell. Disconnect these loads one at a time and see if the error clears when powering up (only if you are competent and can do this safely).
• Inspect main PCB: Remove the top cover and access the control board housing. Look for burnt components, cracked solder joints, or signs of moisture ingress. If the board is visibly damaged, it must be replaced.
• Check harness connections: Ensure all multi-pin connectors to the PCB are fully seated and not reversed. Reseat each connector one at a time.
• Professional repair: Because E09 typically indicates an internal PCB failure, component-level repair is not recommended for DIY. Replace the main control board with the exact Grundig part number or contact an authorized service center.