LG DE on a washing machine
Door fault — the machine cannot confirm the door is closed and locked.
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 DE actually means
The interlock never reported back that the door was latched, so the machine refuses to start. Laundry trapped in the seal accounts for most cases; a worn catch or a failed interlock accounts for the rest.
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 its catch.
How to check: Open the door and run a hand right round the seal.
Door not pushed firmly enough
CommonThe door needs a positive push until it clicks; easing it shut leaves the latch un-engaged.
Worn catch or sagging hinge
CommonThe hook wears or the door drops so it no longer enters the lock squarely.
Failed door interlock
OccasionalThe door latches mechanically but the 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 seal, remove anything caught, push until it clicks.
2 minPower-cycle
Switch off at the wall for a minute and 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 band — a short engineer visit if you would rather not open the machine.
45 min
Need an engineer for this DE?
We list 83 washing machine repair businesses across the UK, 28 of which are LG-authorised. Diagnostic callouts typically start around £55, and many will put that towards the repair if you go ahead.
- 0800 037 4915London
- 07407 734204Bonnybridge
- 01344 669700BracknellSame day
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.