AEG E40 on a washing machine
Door open or not locked.
The same code appears on Zanussi and Electrolux machines — they share the same control platform.
You can fix this yourself
No special tools or qualifications needed
About 55 min to work through
Free to £130
DIY: Up to £40 in parts
What E40 actually means
The machine cannot confirm the door is secured, so it will not start. E41 on some models means specifically that the door was left open. As always, check for laundry in the seal before assuming the interlock has failed.
What causes it, most likely first
Laundry caught in the seal
Most likelyA trapped corner of fabric holds the door fractionally proud so the latch misses.
How to check: Open the door and run a hand right round the seal.
Door not closed firmly
CommonThe door needs a positive push until it clicks.
Worn catch or dropped hinge
CommonThe hook wears or the door sags so it no longer enters the lock squarely.
Failed door interlock
OccasionalThe lock latches mechanically but its contacts no longer signal the board.
Door interlock£15–£40 for the partDIY with care
How to fix it, step by step
Clear the seal and close firmly
Run a hand round the whole seal, remove anything caught, and push the door until it clicks.
2 minPower-cycle
Switch off at the wall for a full minute, then restore power.
3 minInspect the catch and hinge
Check the hook for wear and cracks, and watch whether the door drops as it swings.
5 minTorchReplace the interlock if it persists
A cheap part behind the door seal retaining band — a short engineer visit if you would rather not open the machine.
45 min
Need an engineer for this E40?
We list 83 washing machine repair businesses across the UK, 38 of which are AEG-authorised. Diagnostic callouts typically start around £55, and many will put that towards the repair if you go ahead.
- 0115 8719265NottinghamSame day
- 0800 037 4915London
- 07407 734204Bonnybridge
Parts you might need
Typical UK prices for the part alone, before fitting. Worth knowing before you accept a quote — the part is often a small share of what a repair is priced at.
Door interlock
The electrically operated latch that proves the door is shut before the machine will fill, and holds it shut until the drum stops.
£15–£40
Worth repairing, or replace it?
At the top of this range the repair costs a significant share of a graded replacement, which typically starts around £200. Worth getting the quote first, then deciding — on a machine under about five years old a repair usually still wins.