F9 error; oven door may not lock/unlock during pyrolytic self-clean or high-temperature cycles

Safety first: Ensure the oven is cool. Turn off power at the breaker before attempting to access the lock mechanism.

• Check door alignment: Verify that the door closes evenly and the latch engages smoothly. Adjust hinges if the door is sagging.
• Listen for lock motor: When starting a self-clean or high-temp cycle, you should hear the lock motor operate. No sound suggests a failed motor or no power.
• Access lock assembly: Remove the top panel or front trim (depending on model) to reach the door lock mechanism mounted near the top front of the oven.
• Inspect for jams: Look for bent metal parts, grease buildup, or foreign objects preventing the latch from moving. Clean and lubricate lightly with high-temperature-safe lubricant if necessary.
• Test switches and motor: Use a multimeter to check continuity of the lock switches and resistance of the lock motor. Replace the door lock assembly if defective.
• Reset lock: After repair, restore power and attempt to run a short cycle to confirm the door locks and unlocks correctly.

Warning: Never force the door open during a locked high-temperature cycle; allow the oven to cool and power down before attempting manual release.