Self-clean or pyrolytic cycle will not start (on pyrolytic Belling models); error displayed when attempting to lock door.

Safety: Ensure the oven is cool and isolated from mains before working on the lock mechanism.

• Check for obstructions: Inspect the door area for debris or warped liners that might prevent the lock bolt from moving.
• Access lock assembly: Remove the top cover or front panel (depending on model) to reach the door lock motor and mechanism.
• Test lock motor: Disconnect the lock motor and measure resistance. An open circuit indicates a failed motor. Also check that the lock moves freely by hand.
• Inspect lock switches: Many locks have micro-switches to indicate locked/unlocked status. Test each switch with a multimeter for correct operation.
• Check wiring and connectors: Ensure all connectors are secure and wiring is intact between the lock and control PCB.
• Replace lock assembly: If the motor or mechanism is faulty, fit a new Belling door lock assembly and re-test the pyrolytic cycle.