A snapped garage door cable is one of those problems that looks minor but isn't. The door might hang crooked, refuse to open, or — worst case — drop suddenly. Cables work with the springs to control the weight of the door, and when one breaks, the full load shifts to one side.
What Garage Door Cables Actually Do
Most people focus on springs, but cables are equally critical. On a standard torsion spring system, two steel cables run from the bottom bracket of each side of the door up and around a drum at the top. When the door opens, the cables wind around the drum. When it closes, they unwind under controlled tension.
If a cable snaps, the door's weight is no longer balanced. It can tilt, jam in the tracks, or come crashing down. This is a safety hazard — a standard residential garage door weighs 130 to 300 pounds.
Warning Signs Your Cable Is Failing
- Door hangs crooked — one side higher than the other, especially visible from inside
- Fraying visible on cable — individual wire strands poking out, especially near the bottom bracket
- Grinding or scraping noise — a frayed cable dragging against the track or drum
- Door won't stay in place — slips down when you release it at half-open position
- Loose cable hanging — if you can see a cable dangling or coiled on the floor, it's already broken
What Causes Cable Failure
In Central Oregon, the most common causes are:
- Corrosion — moisture from snow melt and condensation rusts cables from the inside out. You can't always see it until it snaps.
- Wear at the bottom bracket — the cable bends sharply where it attaches to the bottom bracket. This bend point is where 80% of failures occur.
- Spring imbalance — when one spring is weaker than the other, the cables take uneven load. We always replace both springs for this reason.
- Age — cables typically last 8-15 years depending on usage and maintenance. Our freeze-thaw cycles and dust shorten that.
Why You Shouldn't DIY This
Cable replacement requires releasing spring tension — the same 200+ pounds of force that makes spring replacement dangerous. The cable connects directly to the spring system. Even with the right tools, one slip can cause the door to drop or the spring to unwind violently.
Oregon law (ORS 701.026) requires a licensed contractor for this type of work. We've seen three homeowners come to us after failed cable DIY jobs, two with injuries and all three with additional damage that made the repair more expensive than if they'd just called us first.
Our Cable Repair Process
We replace both cables even if only one is broken — if one failed, the other is the same age with the same wear. We inspect the drums for grooves, check the bottom brackets for cracks, and verify spring tension is balanced. Most cable repairs take 30-60 minutes and we carry the cables on the truck.
When to Call
If your door hangs crooked, you see fraying on a cable, or a cable has snapped — don't operate the door. Call us at 541-203-7676. Same-day service available Mon-Fri when you call by 2 PM.