Menus are sometimes hierarchically organized, allowing navigation through different levels of the menu structure. Selecting a menu entry with an arrow will expand it, showing a second menu (the sub-menu) with options related to the selected entry.
Torsion springs are normally mounted horizontally above the opening of your garage door. When you pull the door down, cables attached to the bottom corners actually force the springs to wind up, in turn energizing the system.
The door itself is on a set of rollers in a track and is assisted in opening and closing by a set of torsion springs, drums, cables, and the garage door opener. In most cases if your garage door wonât open, or opens part of the way then shuts, one of the torsion springs has broken. The springs will typically last anywhere from 10,000 to 20,000 cycles. Replacing torsion springs can be done by the homeowner but it is not advisable. By the time you get the springs and the correct tools, you would have been better off paying someone to do the job. But the garage door repair industry is riddled with dishonest business operators.