On the covered LG range or oven, F10 means a Door Locking System Failure on the UPPER oven — LG's own wording. First, check for anything obstructing the door or latch before forcing it. Then: for F10 LG's steps are to press CLEAR/OFF and retry, then, if the lock error is still there, to switch the breaker off for 30 seconds — LG's own sequence.
Differential
Likely causes of “LG range or oven code F10”, and how to tell them apart
- 1
A door lock motor that is stuck
What separates it The door will not lock or unlock and the code shows
How to confirm Try to start a clean cycle and listen for the lock motor
- 2
A latch that is blocked by food or an item
What separates it The door looks shut but the lock does not engage
How to confirm Look at the latch area on the door and frame
- 3
A door switch that is not sensing the door
What separates it The oven thinks the door is open
How to confirm Open and close the door and watch the display
- 4
A bent or misaligned door
What separates it The latch hits the frame at an angle
How to confirm Check the door gap is even all round
- 5
A lock assembly that has worn out
What separates it The lock sticks after many clean cycles
How to confirm A technician replaces the lock assembly
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether the code is F10 or F20
- Whether the door is locked or unlocked now
- Whether it happened during self-clean
- Whether anything obstructs the latch
Try in this order
0 of 9 completedWhat to do first
ReversibleCheck for anything obstructing the door or latch before forcing it.
Correct only the documented fault domain
ReversibleFor F10 LG's steps are to press CLEAR/OFF and retry, then, if the lock error is still there, to switch the breaker off for 30 seconds — LG's own sequence.
Never force the latch
ReversibleLet the oven cool and do not pull on a locked door, since a bent latch turns a reset into a repair.
Do the two-stage reset
ReversiblePress CLEAR/OFF, retry, and if the code returns turn the breaker off for 30 seconds.
Let the oven cool completely
ReversibleA lock motor that failed during a clean often frees itself after an hour of cooling; do not force the door before then.
Look at the latch and frame
ReversibleWith the oven cold, check the latch hook and its slot for food, foil or a gasket that has folded in.
Check the door gap
ReversibleAn uneven gap along the top or sides suggests a bent hinge or a loose door, which stops the latch from meeting the lock.
Do not run another clean
ReversibleA worn lock fails again under the heat of a self-clean cycle.
Note when it failed
ReversibleRecord whether the code came before, during or after a clean, and which oven.
Model-specific
What is true of this model and not of its siblings
- Lock motor
- It turns a hook to hold the door shut during a clean.
- Why it fails
- Heat from repeated self-cleans wears the motor and the switch.
- What LG says
- LG gives the reset and then service if the problem continues.
Stop boundary
When this stops being a self-service repair
- !Do not force the door latch, with the full model number and exact code ready
- !Never force a latched self-clean door; heat and pressure can injure
- !If the door is locked hot and the code stays, wait for it to cool and book service
- !If the code returns after LG's reset, book service with the model and code
Evidence ledger
Sources behind this answer
Where the manufacturer's article stops. The upper and lower oven distinction is LG's own.
Exact questions
Common questions
What does F10 mean on a LG range or oven?+
a Door Locking System Failure on the UPPER oven — LG's own wording.
Can I open a locked door?+
Do not force it; try the breaker reset first.
Can I clean the latch while the oven is warm?+
No; wait until it is completely cool and the power is off.
What is the difference between the upper and the lower door lock codes?+
LG words F10 as a door locking failure on the upper oven and F20 on the lower oven; they share this page.
Why is my door stuck shut after a clean?+
The lock motor is supposed to release when the oven cools. If it does not, the lock assembly has worn or the control did not receive the signal.
Can I pull the door open?+
No, a forced door can bend the hinge and injure you if the oven is still hot, so wait for it to cool and call service if it stays locked.
Will it harm my cooking?+
A door that will not latch may stop clean cycles; ordinary baking may work, but follow what the display says.
Is the lock assembly expensive?+
It is a moderate part, and the main cost is the visit.