Opener operates normally but door does not lock securely when closed; can be lifted easily by hand.

Safety first: Be aware of security risk until corrected.

• Check closed position: Ensure the door fully contacts the floor and the curved arm is slightly past vertical when closed, creating a locking effect.
• Adjust down travel: Reduce the down limit slightly so the arm moves into a more secure position without overloading the door.
• Add manual lock: For improved security, consider installing a manual slide lock on the door (ensure it is always unlocked before operating the opener).
• Test resistance: With the opener engaged and door closed, attempt to lift the door. It should resist moderate force.