Ok, so I'm trying to figure out what exactley keeps a door opener closed.Why? I was helping my grandparents and discovered that a little tug and the door opens by itself.. bably the antique door openers...but it made me wonder, are new ones much better?
they are held by motor that has been locked kinda,what happens is when the door gets to the end of the cycle that is programed into it,the motor stops in a locked position until the door opener is hit again then it runs through its cycle again,only in the oposite position
