Cable repair
Cables do the same job as the springs, just in steel rope: they carry the door's weight from the spring to the bottom bracket on each side. When one frays through, the door goes crooked or dead: and a cable that lets go while the door is moving is what puts doors off their tracks.
How you know it's a cable
The door lifts crooked, sits tilted when closed, or you can see a frayed or dangling line at the bottom corner. Rust is the usual story here: eight wet months a year is hard on bare steel at the bottom of the travel, and the bottom loop sits where splash water collects.
What the work looks like
- Both sides get done together, same reasoning as springs: the other cable is the same age
- The crew checks the drums and bottom brackets while it's apart, since a worn drum chews new cables
- Door gets rebalanced after, so one side isn't carrying more than the other
What moves the price
Straightforward when the cable is the only failure; bigger when the snap took the door off the track or bent a panel on the way. A cable that failed from rust usually has neighbors that aren't far behind, which is why both sides get quoted.
