When Sure-Lock is ON and the garage door is in the fully closed position, the powerhead cannot be
activated by the wall console or a remote.
Note: If Sure-Lock is activated while the garage door is not fully closed, the door can still be operated until the door is in the fully closed position.
Slide the Sure-Lock Switch up to activate it. The backlight will be OFF.
Slide the Switch down to turn Sure-Lock OFF. The backlight will be ON.