Oven will not start; display shows F03 shortly after a cook command

Safety first: Disconnect power at the breaker. Sharp metal edges are present when removing panels.

• Step 1 – Check door closure: Ensure the oven door closes fully and is not obstructed by racks or pans. Try gently pressing on the door while starting a cycle.
• Step 2 – Listen for lock motor: When starting a self-clean or certain high-temp modes (with power restored), listen for the door lock motor. If it is silent or just clicks, the lock assembly may be faulty.
• Step 3 – Access lock assembly: Turn power OFF. Remove the top rear panel or control panel (depending on model) to access the door lock motor and switches.
• Step 4 – Inspect mechanism: Check for bent lock rod, broken plastic pieces, or obstructions. Manually move the lock arm to verify it is not seized.
• Step 5 – Test switches: Using a multimeter, test the door lock switches for continuity in locked and unlocked positions. Replace the lock assembly if switches are open when they should be closed.
• Step 6 – Check wiring: Verify the harness from the lock assembly to the main control is fully seated and not damaged.

When to call a technician: If the lock motor receives power but does not move, or if you are not comfortable removing the control panel, have a professional replace the door lock assembly.