Oven displays F9 and the door may remain locked or unlocked incorrectly; self-clean may not start or finish.

Safety first: Turn off power at the breaker. The door may be locked; do not force it open.

• Allow cooling: If the error occurred during self-clean, wait until the oven is completely cool; the lock may release automatically once temperature drops.
• Manual release (if accessible): On some LG Studio models, you can access the lock mechanism from the top by removing the cooktop or upper panel (power OFF). Gently move the lock lever to release the door.
• Inspect lock assembly: With the top or rear panel removed, locate the door lock motor assembly. Check for broken plastic parts, loose screws, or disconnected wires.
• Check switches: The lock assembly typically has position switches. Ensure the actuator engages them fully when the lock moves. If a switch is broken or not clicking, the assembly should be replaced.
• If the motor does not run during lock/unlock commands: The lock motor or its wiring is likely faulty. Replace the door lock motor assembly as a complete unit.

Warning: Do not attempt self-clean again until the lock system is fully functional; a failed lock can trap the door closed.