AEG washing machine E40 error code
E40 means door fault. The door is not properly closed or the lock is not engaging, so the programme will not start.
Often fixable at home · Fault type: Electrical/hardware
Safe checks, in order of likelihood
- Check nothing is trapped in the door or lock.
- Close the door firmly until it clicks.
- Reset (unplug 1 minute) and restart.
Call a professional when…
If the code returns after these checks, book a qualified engineer.
Parts usually involved
- Door lock
- Door interlock