Oven displays F9 and may not start or may shut down; often associated with door lock or self-clean issues.

Safety first: Turn off power at the breaker before attempting to access the door lock mechanism. The lock can move unexpectedly when powered.

• Step 1 – Check door closure: Ensure the oven door closes fully and evenly. Look for bent hinges or obstructions around the latch.
• Step 2 – Listen for lock motor: When starting a self-clean or a cycle that uses the lock, you should hear the lock motor run. If you hear grinding or no sound at all, the lock assembly may be failing.
• Step 3 – Access lock assembly: Remove the top panel or rear panel (depending on model) to reach the door lock motor and latch. Inspect for broken plastic parts, disconnected rods, or burnt wiring.
• Step 4 – Test switches: The lock assembly usually has one or more micro-switches to indicate locked/unlocked position. With power OFF, test continuity of these switches while manually moving the lock.
• Step 5 – Replace lock assembly: If the motor is seized, gears are stripped, or switches do not change state, replace the complete door lock motor assembly with the correct Zline part.

Warning: Do not force the door open during a self-clean cycle; allow the oven to cool and power to be removed before attempting manual release.