Oven shows F4 and will not start a cooking cycle.

Safety first: Disconnect power before working on the door lock. Sharp edges may be present around the oven frame.

• Check door closure: Ensure the door closes fully and evenly. Look for obstructions or bent hinges.
• Listen for lock motor: When starting a cleaning or locked cycle, you should hear the lock motor operate. No sound suggests a failed motor or no power.
• Inspect latch (front): With the door open, check the latch hook for damage or looseness. Tighten mounting screws if needed.
• Access lock assembly (technician): Remove the top panel or front trim to reach the lock motor and switches. Test continuity of the lock switch and motor coil.
• Replace faulty lock assembly: Fit the correct Montpellier door lock kit and ensure wiring is reconnected exactly as original.