Does this guide apply to your appliance?

Match the brand, device type and complete display code. The same code can mean something different on another product family or market; a series name does not confirm every model in that series.

Model and family references in this record:

DualSense7000 Series ProSteam8000 Series PowerClean9000 Series ÖKOKombiProSteam Integrated

Likely causes

  • Door is not fully closed or latch is not engaged
  • Laundry caught between the door glass and rubber door seal
  • Drum overloaded, pushing laundry against the door
  • Mechanical child safety lock engaged on the door frame
  • Defective door lock mechanism or internal interlock wiring fault

What to try

Ensure Door Is Properly Closed

Easy
  1. Open the washer dryer door fully.
  2. Push the door firmly shut until you hear an audible click.
  3. Press the Start/Pause button to check if the error clears and the cycle begins.

Source for this check: www.aeg.co.uk

Clear Obstructions and Check Drum Capacity

Easy
  1. Open the door and inspect the rubber door seal (bellows) for trapped items.
  2. Remove any clothing caught between the rubber gasket and the door glass.
  3. If the machine is overloaded, remove excess laundry to prevent the load from pushing against the door.
  4. Wipe the door rim and seal clean, then firmly reclose the door.

Source for this check: www.aeg.co.uk

Check Child Safety Lock and Reset the Machine

Easy
  1. Inspect the inside rim of the door for a mechanical child safety mechanism.
  2. If engaged, use a coin or flat tool to turn the mechanical lock to the deactivated position.
  3. Switch off the appliance and remove the plug from the mains socket.
  4. Wait 30 to 60 seconds to allow the control electronics to reset.
  5. Plug the machine back in, power it on, and restart the cycle.

Source for this check: www.aeg.co.uk

Inspect Door Latch or Contact Service for Lock Replacement

Professional

This is a service referral, not a do-it-yourself repair procedure.

  1. Inspect the door hook and latch mechanism on the door and frame for visible cracks, bending, or damage.
  2. If the door latches mechanically but the machine still displays E40, the internal electrical door lock switch has failed.
  3. Disconnect the appliance from the mains power supply.
  4. Contact an authorized AEG service center or a qualified domestic appliance engineer to test and replace the door interlock.

This step is marked professional. Stop if you are not qualified to continue.

Source for this check: www.aeg.co.uk

The code returned or the check did not help?

Avoid repeated resets and do not select a replacement part from the code alone. Record the exact code, full model number, when it appeared, and the checks you tried with their results. Share these details with the manufacturer or service technician.

Disconnecting power does not establish that internal components are safe to touch. This guide does not authorize opening electrical components or bypassing safety devices.

Related error codes

AEG E10AEG washer-dryer error E10: water intake or drainage problem AEG C1AEG Washer Dryer Error Code C1: Water Fill or Drainage Issue AEG E20AEG washer-dryer error code E20: drainage problem AEG C2AEG Washer Dryer Error Code C2 (Drainage / Pump Fault) AEG E30AEG Washer Dryer Error Code E30 (or C3 / 3 Beeps) AEG C3AEG Washer Dryer Error Code C3: Water Detected in Base Tray

References