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.
Extension springs should be replaced in pairs. Unequal pull will result of replacing one extension spring and your garage door will not function properly. Always unplug and detach your garage door opener from garage door before any repair. replacing a broken cable or spring (other parts too)in overhead garage door.xtension springs should be replaced in pairs. Unequal pull will result of replacing one extension spring and your garage door will not function properly. Always unplug and detach your garage door opener from garage door before any repair. replacing a broken cable or spring (other parts too)in overhead garage door.