Oven displays F9 and the door may remain locked or will not lock/unlock properly.

Safety First: Disconnect power before working near the door lock mechanism. Avoid forcing the door open to prevent damage.

• Check door alignment: Inspect the oven door for sagging or misalignment. Tighten hinge screws and ensure the door closes squarely into the frame.
• Listen for lock motor: When starting a self-clean or when the oven attempts to lock/unlock (before disconnecting power), listen for the lock motor running. No sound suggests a failed motor or power issue.
• Access lock assembly: Remove the top panel or rear panel (depending on model) to access the door lock motor assembly and latch switches.
• Test lock motor: With power off, disconnect the lock motor and measure resistance across its terminals. An open circuit indicates a bad motor.
• Check latch switches: Use a multimeter to test continuity of the latch switches while manually moving the latch. Replace the door lock assembly if switches do not change state.
• Inspect wiring: Check the harness from the lock assembly to the control board for pinched or broken wires.
• Manual unlock (if needed): Some Thor Kitchen ovens have a manual release accessible from the top or rear. Consult the service manual to safely release the lock without forcing the door.