Garage Door Cable Snapped: What to Do Next
A snapped cable leaves the door crooked and jammed, and it puts extra load on the other cable. Stop using the door and call for help.
Garage door cables are easy to overlook, because they are thin steel lines that do their work quietly. They connect the spring system to the bottom of the door, keeping the door level as it rises and falls. When a cable snaps, frays, or slips off its drum, the door loses its balance in an instant. One side drops, the door hangs crooked, and it can jam in the tracks or refuse to move at all. Knowing what to do in that moment matters, because the wrong move can damage the door further.
How to tell a cable has failed
Why cables fail
Cables fail from wear, rust, and stress. Each time the door moves, the cables wind and unwind on the drums above the door. Over years of cycles, individual strands break and the cable frays. Moisture in the garage can cause rust, which weakens the steel further. A cable can also slip off its drum if the door is operated while a spring is broken, or if the door is forced when it is jammed. Because the two cables share the door's weight, one failing cable puts extra load on the other, so a frayed cable left in place can lead to the second cable failing too. Cables and springs work as one system, so a cable problem is often a sign that the springs need attention as well. Our garage door cable repair page explains how the two work together, and our post on signs of a broken spring covers the symptoms that often appear at the same time.
What a contractor does
A contractor will inspect both cables, the drums they wind on, and the springs, because a cable problem can be a symptom of a spring problem. Replacing a cable involves securing the door, safely releasing spring tension, fitting a new cable of the correct length and strength, and re-tensioning the system so the door lifts evenly. Cables are not interchangeable by guesswork: the length and thickness must match the door's weight and the drum size. After fitting, the contractor will test the door through several full cycles to confirm it rises level and closes evenly, and will check the rollers and tracks for any damage caused while the door was running crooked. If the door came off its track while the cable failed, the contractor will also check the tracks, which our off-track door repair page describes.
What to do now
Do not try to force a crooked door up or down, and do not try to reattach a cable yourself. The cables are connected to the spring system, which is under high tension, and handling them without the right tools can cause serious injury. Leave the door as it is, unplug the opener if it keeps trying to run, and call (615) 845-8263 for service assistance. Describe whether the door is crooked, whether you can see a loose or frayed cable, and whether the door is open or closed. Homeowners in Murfreesboro, TN and nearby La Vergne can call and describe the problem in their own words, and we will help connect them with an independent local contractor.
Key takeaways
- A crooked door, a loose cable, or visible fraying all point to a cable problem.
- One failed cable puts extra load on the other cable.
- Cables and springs work as one system and are inspected together.
- Do not force the door or try to reattach a cable yourself.
Related services
- Garage Door Cable Repair — Help with snapped, frayed, or loose cables that leave the door crooked, jammed, or hanging unevenly.
- Garage Door Spring Repair — Help with broken torsion and extension springs — the most common reason a door suddenly becomes too heavy to lift.
Related guides
See all guides on our blog, or browse our garage door services.
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