LG Oven Error Code F20
F20 is the companion to F10, reported for the lower oven on double-oven models or by newer control platforms: the lock motor operated but the door never reached the expected locked or unlocked state. Cooling, a reset and clearing obstructions solve the simple cases.
Also shown as: F-20
Common causes
- Lower door lock motor failed or stalled
- Latch misaligned or blocked by debris or foil
- Lock position switch not signalling the control
- Damaged lock wiring or connector
What to check, in order
- Never force a locked door. If self-clean was running, wait until the oven is completely cold; the latch normally releases as it cools.
- Press CLEAR/OFF, reset power at the breaker for a few minutes, then start and cancel a clean cycle to run the lock motor through its travel.
- Look along the door frame and latch slot for foil, rack contact or food buildup stopping the hook.
- A lock motor that hums without moving the latch on a cold oven means the lock assembly has failed and should be replaced by a technician.
Clear the code and test
- Fix what the checks above found first. Clearing the code without fixing the cause only brings it back.
- Plug the appliance back in and restore its water supply if it has one.
- Run the shortest programme and watch the point where the code appeared before.
- If the programme finishes with no code, the fault is cleared. If the code returns, write it down before calling a technician — it speeds up the diagnosis.
When to call a professional
Most cases are solved by the checks above. Book a technician if any of these apply:
- The code comes back after you have run the checks and a test cycle.
- You smell burning, see sparks or scorch marks, or the breaker trips.
- Water is leaking and you cannot stop it at the tap.
- The fix needs panels opened beyond what your manual describes, or a part tested with a meter, and you are not set up for that.
When you call, give the brand, the code F20, your model number (on a label inside the door or on the back) and the checks you already ran. It shortens the visit.
Parts that may be involved
Door lock motor assemblyDoor latchElectronic control board
Parts are model-specific. Find your model number first — usually on a label inside the door, on the door frame or on the back — and match the part to that number before ordering.
Questions people ask about F20
What does F20 mean on a LG oven?
F20 means: Door lock error: door lock failed while operating. F20 is the companion to F10, reported for the lower oven on double-oven models or by newer control platforms: the lock motor operated but the door never reached the expected locked or unlocked state. Cooling, a reset and clearing obstructions solve the simple cases.
Can I fix LG F20 myself?
Start yourself: the checks on this page cover the causes you can reach without opening the machine up. If they point to a faulty part, testing or replacing it is usually a technician job.
How do I clear LG F20?
Fix the cause first — clearing the code on its own brings it straight back. Then restore power and water, run the shortest programme, and watch the stage where the code appeared. If the programme finishes with no code, it is cleared.
Sources checked
- LG Help Library: washing machine error codes
- PartsTown Resource Center: LG washing machine troubleshooting codes
The meaning and checks for this code were checked against the sources above in November 2026. Codes vary by model and region; if your manual lists a different meaning for your exact model, follow the manual.