LG Oven Error Code F-10

The F-10 error code on an LG oven indicates a door lock failure specific to the upper oven. This fault is triggered during the initiation of a self-clean cycle when the control detects that the door lock switch has not confirmed proper engagement after the door lock motor has completed two full rotations. The door locking system relies on a motor-driven mechanism that physically moves a latch into a locked position, and a micro switch that signals the control board once that locked position is achieved. When the switch signal is absent or incorrect after the motor's prescribed movement, the control board registers F-10 and halts the self-clean sequence as a safety precaution.

The most common root causes fall into two categories: electrical connection problems and mechanical or component failures. Loose or corroded terminals at either the micro switch or the door locking motor are frequently responsible, as vibration and heat cycles over time can cause connectors to back out of their seats. A faulty micro switch that fails to close or open at the correct position is another common culprit, as is a door locking motor that has worn out or seized and cannot complete its rotation cycle. Physical obstructions around the door latch mechanism can also prevent the latch from traveling far enough to actuate the switch.

Diagnosis begins with disconnecting power to the oven and carefully inspecting all terminal connections at the micro switch and the door locking motor. Terminals should be checked for looseness, corrosion, and proper seating. If connections are secure, the micro switch can be tested for continuity in both its locked and unlocked positions, and the motor windings can be checked for continuity as well. Resistance and voltage specifications should be confirmed against the wiring diagram for the specific LG model being serviced.