If your garage door cable is broken, which is a critical safety cable that works with springs to lift the door, you should stop using the door immediately and take safety precautions because the door can become unbalanced and fall. Garage door cables run from the bottom brackets up through extension springs or wrap around drums at the ends of the torsion tube above the door, and when one breaks, the door will hang crooked, jam, or be extremely heavy on one side. First, stop using the automatic opener and pull the emergency release cord, the red cord hanging from the trolley, to disconnect the opener so it does not try to lift a door with a broken cable and damage the opener or cause the door to go off track. Do not try to open or close the door repeatedly, as the remaining cable and spring are under extra stress. Secure the door in the closed position if possible and keep people and cars away from under it. Do not attempt to replace the cable yourself unless you are experienced, because the cables are under high tension from the springs and can cause injury if mishandled, especially with torsion systems. Call a professional garage door company for repair, which typically costs 150 to 300 dollars for cable replacement including labor, and often they will inspect springs, drums, and rollers at the same time since cable failure is often related to worn springs or frayed cables.
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