On the inside of your door, toward the top, attract a short vertical line down the middle on the door. Whenever you affix the drawbar (the system for elevating and decreasing the door) at this line, the door fat will likely be evenly well balanced with the lifting point. https://repair-garage-door-spring85073.aboutyoublog.com/27743203/a-review-of-sensor-alignment-for-garage-doors