Guide

Garage door cable repair is spring work in disguise

Updated August 25, 2026

A dangling garage door cable looks like the most fixable thing in the garage. It’s a steel rope on a pulley; surely you loop it back on and get on with your day. The catch is what the cable is attached to. Every inch of that cable is managed by the torsion spring above the door, wound to somewhere around 200 pounds of stored force, and you cannot do honest work on one end of that system while the other end is still loaded.

What the cable actually does

The spring doesn’t lift your door directly. It twists a shaft, the shaft turns a drum on each end, and each drum winds up a cable bolted to the bottom corner of the door. The cables are where all that stored force finally touches the door, which is why they’re under full tension any time the door is down and the spring is wound. That’s also why a cable that slips or snaps lets one corner drop and cocks the door in its tracks.

Why you can’t just wind it back on

To seat a cable on its drum correctly, the drum has to be loose enough to turn by hand, and that only happens once the spring’s tension has been released with winding bars. Rethread a cable without unwinding and one of two things happens. Either you’re fighting the full spring force and the cable won’t seat in its groove, or it seats crooked, works for a week, and jumps the drum again the first time the door hits a patch of ice at the threshold. When we see a door on its second jumped cable in a month, there’s usually a first repair attempt in the story.

Unwinding and rewinding a torsion spring is the same operation as replacing one. Same bars, same risk, same skill. This is the whole reason cable repair and spring repair are one trade and one service call, not two.

What a cable visit includes

Because the spring comes unwound anyway, a proper cable job is a small inspection of the whole lifting system while it’s at rest:

• both cables replaced as a pair, since the second one has the same mileage and rides an identical drum
• drums checked for the sharp groove wear that chews through new cable
• spring condition and cycle count eyeballed while it’s safe to look
• the door rebalanced and run before we leave

Cable work sits in the $150 to $250 range around Kearney, and it lands on the same visit pricing as spring work when both need doing, which they often do. The parts are cheap; you’re paying for the controlled handling of a loaded spring.

If your door is sitting crooked right now, leave the opener alone. A one-cable door binds in its tracks, and every powered cycle grinds the bottom corner and the track edge. Prop nothing, force nothing, and call with the door’s approximate age; the fix is usually one visit.