SYMPTOM · GARAGE DOOR CABLE SNAPPED OR OFF THE DRUM
THE CABLE LET GO.
A cable hanging loose at the side of the door, one corner lower than the other, maybe a sharp snap. A lifting cable broke or slipped off its drum, and the door shouldn't move again until it's fixed.
WHY CABLES FAIL.
Lifting cables run from the bottom brackets on each side of the door up to drums on the spring shaft. Every time the door opens, the springs turn the shaft, the drums wind the cables, and the cables lift the door. They carry the door's full weight on every cycle.
Cables fail in two ways. Some wear through: a few broken strands, then rust where the cable meets the bottom bracket, then a snap. Others come off the drum: when a spring breaks, the door binds in the track, or the door comes down on something, the cable goes slack and jumps out of its groove.
Either way, one side of the door is now doing all the lifting. That's why the door hangs crooked, and why rollers on the slack side often pop out of the track. Running the opener again can twist the door, bend the track, or bring the door down hard.
The fix is replacing both cables, not just the broken one, and checking the drums, bearings, bottom brackets, and springs while the tension is off. A cable that came off its drum often picks up kinks that make it fail later, so it gets replaced too.
We fix snapped and slipped cables across Mocksville, Davie County, and the western Triad. If your door is crooked right now, call (336) 745-8173 and we'll tell you whether it needs a truck tonight or can safely wait for morning.
CHECK THIS FIRST.
- Look, don't touch: a cable hanging loose, or wrapped wrong on the drum at a top corner.
- Check whether one side of the door sits lower than the other.
- Look at the springs above the door. A broken spring often causes a cable to slip.
- If you can reach it safely, unplug the opener so nobody runs the door out of habit.
Never try to rewind a cable onto its drum or loosen a bottom bracket. Both are under spring tension, and that tension is what breaks hands.
CABLE, SPRING, OR TRACK?
Snapped cable
The cable is in two pieces, usually frayed at the bottom bracket where moisture collects. The door sits crooked and may be wedged in the track. Both cables get replaced; see garage door cable replacement.
Cable off the drum
The cable is in one piece but loose or tangled at the top corner. This often follows a broken spring or a door that bound up in its track on the way down.
Broken spring
You'll see a gap in the coil above the door. A spring break and a cable problem often happen together, so we check both. See broken spring repair.
Rollers out of the track
If rollers have popped out of the track too, the same rule applies: stop running the door. Read garage door off track or crooked.
STRAIGHT ANSWERS.
REVIEWED OCTOBER 2026
Can I fix a snapped garage door cable myself?
We don't recommend it. The cable is part of the spring system, and getting it back on the drum means working against spring tension. Without winding bars and experience, that's how people get hurt. It's a quick job for us with the parts on the truck.
Is it safe to open the door with a broken cable?
No. One side of the door is unsupported, and running it can twist the door, bend the track, or let it fall. Leave it where it is, keep people and cars clear, and call.
Why did my cable come off the drum?
Usually because it went slack: a spring broke, the door bound up in the track, or the door came down on something. When the tension came back, the slack cable jumped its groove on the drum.
Should both cables be replaced?
Yes. They're the same age and carry the same load, and a new cable on one side with an old one on the other means uneven lifting. We replace both and check the drums and bottom brackets at the same time.
THE FIX WE DO.
Not quite what your door is doing? Read about crooked, or off the track, loud bang, now it won't open or grinding, squeaking, banging.