Door error — washer cannot confirm door is securely closed
The dE error on the LG WM3900HWA indicates door error — washer cannot confirm door is securely closed. This typically occurs due to door not fully closed or latched properly. Most homeowners fix this in 5–15 min by following the steps below.
Common Causes of dE
- 1Door not fully closed or latched properly
- 2Clothing caught in the door gasket preventing a tight seal
- 3Worn or broken door latch hook
- 4Faulty door lock switch assembly
How to Fix dE
- 1
Step 1
Disconnect the washer from the wall outlet before touching anything
- 2
Step 2
Open the door and inspect the rubber door gasket — remove any clothing, coins, or debris trapped in the seal
- 3
Step 3
Close the door firmly until you hear a distinct click confirming the latch has engaged
- 4
Step 4
Visually inspect the plastic door latch hook for cracks or visible deformation
- 5
Step 5
Plug in the washer and try starting a new cycle to confirm the error has cleared
- 6
Step 6
If the error persists with the door properly latched, the door lock assembly likely needs replacement
Tools Needed
When to Call a Technician
Door closes and latches but the dE error still appears — the door lock switch assembly needs replacement
Frequently Asked Questions
Common questions about LG dE error
Never force the door open. If the door is stuck, unplug the washer and wait at least 5 minutes. The magnetic door lock releases automatically once power is removed for several minutes. Forcing the door can crack the latch or damage the door seal.
If the dE error appears even after firmly closing the door, the door lock switch assembly may have failed. The switch sends a signal to the control board confirming the door is locked. A faulty switch means the board never receives that confirmation, keeping the washer from starting.
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