AGA oven displays F9 and the door lock may remain engaged or fail to lock for pyrolytic/self-clean cycles.

Safety first: Disconnect power before attempting to release a stuck door lock. The door and cavity may be very hot after a cleaning cycle.

• Allow to cool: If F9 occurred during or after a self-clean cycle, wait until the oven is completely cool; some models will only release the lock below a safe temperature.
• Manual release: Remove the top panel and locate the door lock assembly. Many AGA designs include a manual release lever that can be moved to unlock the door. Consult your model's service information.
• Inspect latch and switches: Check that the latch arm moves freely and that the microswitch actuators are not bent or broken. Test the switches for continuity when the latch is in locked and unlocked positions.
• Check lock motor: Measure resistance of the lock motor coil. An open circuit indicates a failed motor. Also check for 230 V (or appropriate voltage) at the motor terminals when a lock command is issued (qualified persons only).
• Replace lock assembly: If the motor or switches are faulty, replace the complete door lock assembly with an AGA-approved part. If the lock tests good but is not driven, the control PCB may be defective.