mypros+
Error code reference

LG Range Error Code F10

Door lock failure

LG codesLG range codes

Door lock failure — door lock fails while operating the lock motor (door lock switch does not operate properly after motor rotates twice).

First step from the service manual

Check electrical wiring, lock motor resistance (approximately 2.6 kΩ), and micro switch continuity.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for F10.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What F10 means on a LG range

The F10 error code on an LG range indicates a door lock failure during a self-clean cycle or any other operation that requires the oven door to lock. Specifically, the fault is triggered when the door lock switch fails to confirm a locked position after the lock motor has completed two full rotations. The control board sends power to the lock motor, expects feedback from the micro switch confirming that the latch has engaged, and when that confirmation signal does not arrive within the expected window, the F10 code is set and the operation is halted.

The door lock system consists of three primary components: the lock motor itself, the micro switch (or switches) that confirm latch position, and the wiring harness connecting these components to the main control board. The lock motor should measure approximately 2.6 kΩ resistance when tested with a multimeter. A reading significantly outside this value indicates a failed motor winding. The micro switch is a separate component that physically detects whether the latch bolt has reached the fully locked position. If the switch contacts are worn, burnt, or mechanically misaligned, the board will never receive the confirmation signal even if the motor is functioning correctly.

Wiring problems are also a common contributor to this fault. Loose connectors, broken wires near the door hinge area (which experience repeated flexing), and corroded terminals can all interrupt the signal path between the switch and the control board. In some cases, the door latch assembly itself may be physically damaged or obstructed, preventing the bolt from traveling far enough to actuate the switch even when the motor runs correctly.

Source: manufacturer service documentation.

Common causes of F10

  1. 01

    Faulty door lock micro switch

    Part replacement

    The micro switch that signals a locked latch position to the control board may have worn or burned contacts. Test the switch for continuity in both its open and closed positions to confirm it is actuating correctly.

  2. 02

    Failed lock motor

    Part replacement

    The lock motor may have an open or shorted winding. Measure resistance across the motor terminals; a healthy motor reads approximately 2.6 kΩ. A reading well above or below this value indicates the motor needs replacement.

  3. 03

    Wiring harness damage or loose connectors

    Wiring / connection

    Wires routed near the door hinge flex repeatedly over time and can develop breaks or loose connections. Inspect the harness from the control board to the lock assembly for damaged insulation, broken conductors, and unseated connectors.

  4. 04

    Obstructed or damaged door latch assembly

    Wiring / connection

    Food debris, a warped door frame, or a physically bent latch bolt can prevent the lock mechanism from completing its full travel, meaning the motor runs but the switch is never actuated. Inspect the latch and the door strike visually and clear any obstruction.

  5. 05

    Defective main control board

    Part replacement

    If the motor resistance and switch continuity both check out correctly and the wiring is intact, the control board itself may not be sending the correct signal to the lock motor or may not be reading the switch feedback properly. This is the least likely cause and should be diagnosed last.

See the test procedure for each cause

Frequently asked questions about F10

What does F10 mean on a LG range?
The F10 code on an LG range indicates a door lock failure. The oven attempted to lock the door by running the lock motor, but after the motor completed two rotations, the door lock switch did not confirm that the latch had engaged. The oven halts the operation and displays F10 as a safety response. The fault points to a problem in the lock motor, the micro switch, or the wiring connecting these components.
Can I fix the F10 error myself, or do I need a technician?
A knowledgeable DIYer can handle many of the diagnostic steps, including checking wiring connections, testing the lock motor resistance with a multimeter (looking for approximately 2.6 kΩ), and testing micro switch continuity. Replacing the lock motor or micro switch is a manageable repair if you are comfortable working with appliance wiring. If the control board is suspected, professional diagnosis is recommended to avoid purchasing an unnecessary part.
Is it safe to use my LG range while the F10 code is active?
Normal baking and cooking functions may still operate while the F10 code is present, but you should not attempt to run a self-clean cycle until the door lock issue is resolved. A malfunctioning door lock means the oven cannot safely contain the extremely high temperatures used during self-cleaning. Address the fault before using the self-clean feature.
Will resetting the oven clear the F10 error code?
Disconnecting the oven from power for a few minutes may temporarily clear the F10 code, but the fault will return as soon as the oven attempts to lock the door again if the underlying problem is not corrected. A reset is useful for confirming whether the error was a one-time communication glitch, but a recurring F10 code requires physical inspection and repair of the lock motor, micro switch, or wiring.
How much does it cost to repair an LG range F10 door lock error?
Repair costs vary depending on the failed component. A replacement door lock motor or micro switch typically costs in the range of $20 to $80 for the part alone. If a technician performs the repair, expect to add a service call fee and labor, bringing the total to a range of $100 to $250 or more. A defective main control board is the most expensive scenario, with board costs ranging from $150 to $350 or higher depending on the model.

Related LG range codes

All LG range codes
View all 39 LG range codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass