Oven displays F9 and may not start; on some models, door lock may be engaged or self-clean may fail.

Safety first: Disconnect power before working around the door lock mechanism. Avoid forcing the door; glass can shatter.

• Check door movement: Verify the door closes fully and the latch engages smoothly. If the latch is misaligned or bent, adjust or replace the latch.
• Access door lock assembly: Remove the top panel or front trim (depending on model) to reach the door lock motor and switches.
• Inspect lock motor: Look for signs of overheating or broken plastic gears. Manually move the lock lever to ensure it is not mechanically jammed.
• Test lock switches: Use a multimeter to check continuity of the lock position switches while manually moving the lock. Replace the lock assembly if switches do not change state.
• Check wiring: Inspect the harness from the lock assembly to the control board for pinched or broken wires. Repair as needed.
• Replace assembly: If the motor does not run when commanded and wiring is intact, replace the door lock motor assembly. If the lock works mechanically but F9 persists, the electronic oven control board may be faulty.