Symptom check
The garage door cable is slack, frayed or off the drum
A garage door cable hanging loose has usually come off its drum or snapped, and the springs above it may still hold full tension. Leave it alone, keep the door still and book a cable replacement rather than rethreading it by hand.
Updated
Hands off the cable, and keep the door still
Do not pull, rewind or tuck a loose cable back onto its drum. The springs can still hold enough force to whip a cable or spin a drum the moment the slack is taken up, and the bottom bracket is under the same load. Unplug the opener, keep people and cars clear, and text a photo of the drum and the bottom corner.
What usually causes it, in order
A cable goes slack for only a few reasons, and the springs above it decide how risky the door is right now.
- Most common
The cable jumped off its drum
What you notice: The cable is in one piece but hangs loose or wraps outside the drum's grooves, often after the door came down on something.
The repair: Rewrap both drums evenly, on fresh cables where the old ones kinked, then reset the spring tension and level the door. Garage Door Cable Replacement, from $185
- Common
A cable that frayed through and snapped
What you notice: One end dangles from the drum or the bottom bracket with broken strands, usually rusted near the floor.
The repair: Replace both lift cables, cut to the door's height, because the second one carries the same wear. Garage Door Cable Replacement, from $185
- Common
A broken spring behind the slack
What you notice: The cable went loose at the same moment as a bang, and a spring on the shaft now shows a split coil.
The repair: Replace the spring, or the pair, and fit new cables while the tension is off. Garage Door Spring Replacement, from $245
- Less common
A bottom bracket rusted thin or bent
What you notice: The cable is still attached at the top, but the bracket at the bottom corner is flaking with rust, bent, or pulling away from the door.
The repair: Replace the bottom brackets with the spring tension wound off, then hang new cables. Garage Door Cable Replacement, from $185
- Less common
A worn or cracked cable drum
What you notice: The cable keeps slipping on the same side, and that drum's grooves are worn smooth or its casting has cracked.
The repair: Replace both drums so the cables wind evenly, then rehang the cables and balance the door. Garage Door Cable Replacement, from $185
Safe checks before you call
Look, photograph and keep your distance, because every part of this system is under tension.
- Note which side the loose cable is on and whether the door still sits level.
- From the floor, look at the drum at that end of the shaft for a cable that has unwound or crossed over itself.
- Check the springs above the door for a coil that has separated.
- Check the lower corner on the loose side for frayed strands or a rusted bracket, without touching either.
- If the door is open, keep everyone out from under it until it has been secured.
- Photograph the drum, the bottom corner and the whole door, and send the photos with your text.
Why a loose cable can still be dangerous
A loose cable is dangerous because the springs that drive it are usually still wound, and only the grip of the cable on its drum is missing.
On a torsion setup, the springs twist the shaft and the drums turn with it. When a cable slips off, the drum on that side still carries the springs' torque, so taking up the slack by hand can spin the drum or snap the cable taut. The bottom bracket is fastened under that same load, and it must never be unbolted while the springs are wound.
How a cable ends up off its drum
A cable usually comes off when it goes slack for a moment and the drum keeps turning with nothing to wind.
That happens when the door lands on a bin or a ridge of ice and the opener keeps driving, when one side binds in the track, or when a spring breaks and the balance shifts all at once. Rust does the rest over time. Lift cables are twisted from fine steel strands, and in a damp garage they corrode first near the bottom bracket, where water sits.
Why cables wear out together on newer Clark County tract doors
Much of the county was built from the 1990s on, and on a door still running its original hardware, the cables, drums and bottom brackets have all aged together.
Census figures date more than half of Clark County homes to 1990 or later, with the median Battle Ground home from 2003 and Ridgefield's from 2012. Builder-grade hardware is not faulty, just the economical grade chosen for a whole street. When one cable fails on such a door, the other cable, the drums and the bottom brackets are the same age, so all of them get inspected and priced together.
What a cable replacement visit includes
A cable repair does more than rethread one cable, because the parts at each end wear along with it.
- The door is clamped in the track and the spring tension is wound off before anything is disconnected.
- Both lift cables are replaced and cut to the door's height, even when only one failed.
- The drums are checked for worn grooves and cracks, and the bottom brackets for rust and bends; worn ones are priced and replaced.
- The springs are wound back to the right turns, the door is leveled, and the balance is checked with the opener disconnected.
- If a broken spring caused the slack, the spring is replaced on the same visit.
Cable hanging loose: questions and answers
Can I put a loose garage door cable back on the drum myself?
No. The springs may still hold enough force to spin the drum or snap the cable tight as soon as the slack is gone, and the bottom bracket it ties to is under the same load. Rethreading it safely takes clamps, winding bars and unwinding the springs first, which is the core of a cable repair.
Can I still use my garage door with a cable hanging loose?
No, not until the cable is replaced. With one side unsupported, the next trip can tip the door out of the track, crease a section or snap the remaining cable. Keep the opener unplugged and the door still, and if a car is stuck inside, say so when you book.
What makes a garage door cable come off the drum on one side?
It went slack for a moment, and the drum kept turning with nothing to wind. That happens when the door hits something on the way down, binds in the track or loses a spring. A drum with worn grooves or a cable stretched with age makes it easier, so the visit checks both.
Is a frayed garage door cable dangerous even if it is still attached?
Yes, a frayed cable can let go without warning, and a snapped cable under spring tension can whip across the garage. Broken strands near the bottom bracket mean the cable has lost much of its strength. Keep clear of that corner, stop using the door and book the cable replacement.
What does a garage door cable replacement visit actually replace?
Both lift cables, cut to your door's height, along with any drum or bottom bracket that is worn, cracked or rusted thin. The spring tension is wound off first and set back afterward, then the door is leveled and its balance checked. If a broken spring caused the slack, it is replaced on the same visit.
Where to go next
Nearby service areas
This call comes in from Vancouver Heights, Bagley Downs, Countryside Woods and East Mill Plain and the rest of our Washington service area.
Want a price before anyone drives over?
Call and describe what the door is doing, or text a photo of the door and the spring above it. You hear the likely repair and where its price starts, then decide.