LG · Dryer
LG Dryer dE Error Code
Door switch not confirming closed
What this error means
dE means the door switch never confirmed closure before the motor or heat circuit energized. LG dryers will not tumble with an open-door signal.
How DE is detected
LG dryer models lock the door or lid before energizing fill, heat, or high-speed spin. DE means the latch switch never sent a "locked" signal to the main control, or the lock motor did not complete its travel. On LG DLEX3900W, LG DLG3501W, and similar variants, clothing caught in the gasket, a misaligned strike, or a failed latch assembly are the most common mechanical causes—not the board itself.
Inspect the door gasket perimeter and strike alignment before replacing the latch. Door not fully shut against the gasket is reported frequently on this code. After correcting mechanical issues, firmly push the door until the latch clicks once. If the latch clicks but DE persists, the door lock switch or wiring harness to the control board likely needs testing with a multimeter.
Do not force the door open during an active cycle; wait for the lock to release when the board de-energizes the lock motor—usually two to three minutes after canceling power on most LG units.
Common causes
- Door not fully shut against the gasket
- Broken door catch or worn strike
- Door switch lever stuck from lint at the hinge
- Child lock or control lock enabled on smart models
Step-by-step fixes
- 1Firmly push the door until the latch clicks once
- 2Inspect the plastic strike on the frame for cracks
- 3Wipe lint from the switch actuator slot along the door opening
- 4Disable Control Lock by holding the designated button per your model label
When to call a technician
Replace the door switch assembly if the door closes firmly but dE shows every start.
Affected models
- LG DLEX3900W
- LG DLG3501W
- LG DLE7300WE
Prevention & maintenance
- Wipe the door gasket weekly and avoid overloading items against the seal—DE often starts as a slow leak or latch misalignment.
- Record when DE appears in the cycle and whether it clears after a 60-second power reset on your LG dryer—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for DE; LG uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting DE; reversed plugs on pumps and valves cause immediate repeat faults.