Garage door opener does not lock the door; you can easily lift the door by hand when it is closed and connected.

Safety first: For security, use a manual lock or padlock if the opener cannot hold the door closed.

Steps to improve locking:

• 1. Verify full close: Ensure the door is reaching the full closed position. Adjust down limit if it stops short.
• 2. Check trolley latch: Inspect the Stanley trolley for a worn or broken latch that might allow backdrive. Replace the trolley if the latch does not fully engage.
• 3. Use manual lock: If your door has a slide lock, engage it when you will be away for extended periods.
• 4. Consider opener replacement: If the internal brake is weak on an older Stanley unit, upgrading to a newer opener with better security features may be advisable.