LG Oven/Range Error Code F9 — Door Lock Mechanism Failure
What this means
The F9 error code on LG ovens signals that the door lock mechanism did not complete its locking or unlocking cycle within the time allowed by the control board. This usually occurs during or after a self-clean cycle. The lock motor may be faulty, the latch may be jammed with debris, or the door lock switch may not be reporting the correct position to the board.
Step-by-step fix
4 stepsLet the oven cool and reset
If the oven just finished a self-clean cycle, wait 60–90 minutes for it to cool below the lock-release temperature. Then turn off the breaker for five minutes and restore power. The lock should cycle and release.
Never force the door open while the oven is hot — the lock is a safety feature designed to prevent burns.
Manually release the lock if stuck
With the breaker off, remove the top rear panel. Locate the lock motor assembly. Find the manual release lever — it's usually a small tab you can slide to the unlocked position. Free the door, then check the mechanism for obstructions.
Photograph the lock assembly before touching anything so you have a reference for reassembly.
Test the lock motor
Disconnect the lock motor wires and test for continuity. Also check the lock/unlock position switches — they should toggle as you manually move the latch arm. If the motor has no continuity, it must be replaced.
Apply a small amount of high-temperature lubricant to the latch slide to ensure smooth operation.
Replace the door lock assembly
If the motor or switches are faulty, replace the entire door lock assembly. It is typically held by two to four screws. Disconnect the old harness, install the new assembly, reconnect the harness, and reassemble. Run a short self-clean cycle to verify lock operation.
Run a 2-hour self-clean test instead of a full 4-hour cycle when verifying the repair.
When to call a professional
If the lock assembly is functioning correctly but the error persists, the control board may not be sending or receiving the lock signal properly. A technician can diagnose the board.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Door Lock Motor Assembly
Part #EBG61305803 · $40–$80
If the lock motor has no continuity or switches don't toggle
Door Lock Switch
Part #6600JB3007B · $8–$20
If switch is available separately and fails continuity test
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