When a garage door cable snaps, frays or slips off its drum, the door usually drops on one side and jams, and the fix is to refit or replace the cable and re-balance the door. We can send a local engineer in the Liverpool area to assess the cables, drums and brackets and carry out the repair.
Cables are easy to overlook until one fails. They connect the bottom of the door to the spring system, so a problem with a cable affects how the whole door moves. Below we explain how cables work, what goes wrong, and why this is not a DIY job.
What garage door cables do
On a sectional door, a steel lift cable runs from the bottom bracket on each side up to a drum on the torsion shaft. As the spring unwinds, the drums turn and wind the cables in, lifting the door evenly. Many up-and-over doors also use cables linking the door to tension springs or a counterbalance system in the frame. Both cables need to be the same length and tension, or the door rises crooked.
Because the cables carry the force from the springs, they work closely with them. If a spring has also failed, read about garage door spring replacement.
Common cable problems
| Problem | What you might notice | Typical cause |
|---|---|---|
| Snapped cable | One side drops, door jams at an angle | Wear, rust or a broken strand that finally gives |
| Cable off the drum | Loose cable hanging, door uneven | Door hit an obstruction while closing, or slack from a broken spring |
| Frayed cable | Broken strands visible near the bottom bracket | Corrosion and age, rubbing on the frame |
| Uneven tension | Door closes with a gap on one side | Cable stretched or drum slipped on the shaft |
| Damaged bottom bracket | Cable anchor point bent or pulled away | Rust, impact or long-term strain |
Signs your cables need attention
- Rust or broken strands, especially near the floor where water collects.
- A cable sitting loose rather than taut when the door is closed.
- The door rising faster on one side than the other.
- A gap under one corner when the door is shut.
- A clunking or slapping noise as the door moves.
- The door jumping or binding in its tracks.
Uneven cables are a common reason doors come out of their runners. If yours has, see garage door off track.
Why cable repair is a job for a professional
The bottom bracket a cable attaches to is held under spring tension. Undoing it while the spring is wound can release that force suddenly, and a snapped cable usually means the door is already unbalanced and unstable. Engineers clamp the door, release or control spring tension first, and use the correct tools. Please don't loosen brackets, re-wrap cables on drums or try to lift a door with a broken cable.
How a cable repair is done
- The door is secured in the track so it can't move.
- Spring tension is released where needed.
- Both cables, drums and bottom brackets are inspected.
- Damaged cables are replaced, usually as a pair so lengths and wear match.
- Cables are seated correctly on the drums and the drums set so both sides lift together.
- Spring tension is restored and the door's balance tested by hand.
- On electric doors, the opener's travel and force settings are checked.
Worn rollers or bent tracks found at the same time can be dealt with on the visit, or as part of regular garage door servicing.
What affects the cost of a cable repair
The price depends on what is actually wrong once the engineer has looked. Refitting a cable that has slipped off a drum is a smaller job than replacing both cables, drums and corroded bottom brackets. Other factors include the door type and size, whether the springs also need replacing, whether parts for your door are carried on the van, and whether the visit is during normal hours. The engineer gives you a price before starting.
Cable corrosion in Merseyside garages
Cables tend to rust from the bottom up, because the lower end and bracket sit close to the floor where rainwater and road salt are tracked in. Garages with poor drainage, older concrete sectional garages and homes near the coast in places like Wallasey, Crosby and Hoylake often see faster corrosion. A quick visual check of the lower cable ends every few months can catch problems early.
If you're not sure whether the fault is the cable or something else, describe what's happening when you ring. We offer a garage door repair service in Liverpool and across Merseyside, and the engineer will find the cause before giving you a price.
Frequently asked questions
Can I use the door with one cable broken?
No. The door is unbalanced and can twist, jam or fall. Leave it in place, keep people away and arrange a repair.
Why do engineers often replace both cables?
Both cables have done the same work and usually have similar wear. Replacing them together keeps the lengths matched so the door lifts evenly and reduces the chance of the other one failing soon after.
My cable came off the drum but isn't broken. Can it just be put back?
Sometimes, if the cable is undamaged. The engineer will check why it came off, for example a broken spring or the door hitting something, and correct that cause as well.
Do up-and-over doors have cables?
Some do and some don't. Many canopy and retractable doors use springs directly attached to arms, while others use cables and pulleys. The engineer will identify your system on the phone or on arrival.
How can I stop cables rusting?
Keep the garage floor as dry as possible, clear standing water near the door, and have the door serviced so cables and brackets are inspected regularly.