Washer-dryer does not lock the door, will not start, and displays F06.

Safety first: Unplug the appliance before removing any panels.

Check the door and lock:

• Inspect door hook: Examine the plastic door catch on the door. If cracked or loose, it may not fully engage the lock.
• Test door closure: Close the door firmly; you should hear a solid click. If the door feels loose or misaligned, adjust the hinge screws.
• Access door lock: Remove the front retaining spring of the door gasket and peel back the seal near the lock. Unscrew the door lock assembly and pull it out slightly.
• Check wiring: Inspect the connector for burning or loose pins. Reseat firmly.

Replace if needed: If the lock coil is open (test with a multimeter) or the mechanism is physically damaged, replace the door lock assembly. Refit the gasket and retaining spring carefully to avoid leaks.