A snapped lift cable is one of the most dangerous garage door failures. Here's exactly what to do—and why DIY is the wrong call. Call 423-583-9355 anytime.
What a snapped garage door cable looks like You'll usually see one of three things: the door hanging visibly lower on one side, a frayed steel cable dangling beside the door, or the door refusing to lift at all even though the opener is running. Sometimes you'll also hear the cable snap—a sharp metallic crack, usually first thing in the morning when the metal is cold and brittle.
If any of that matches what you're looking at, stop using the door.
Why garage door cables snap in Chattanooga - **Rust from humidity** — Chattanooga's 70–80% summer humidity gets into the cable strands at the bottom bracket and rusts them from the inside - **Frayed strands at the drum** — incorrect winding or worn drums slowly cut the cable - **Sudden spring failure** — when a torsion spring snaps, the cable often goes with it - **Worn cable drums** — pitted aluminum drums abrade the cable until it gives - **Overhead obstacles** — a ladder, bike, or shelf catching the cable mid-travel
Most cables in Chattanooga homes are rated for 7–10 years. We see them fail earlier near the river and on doors used 6+ times a day.
Don't try to "just open it once" A broken cable means the opposite-side cable is now carrying double load. It's the next to go. Cycling the door risks dropping it on whoever is underneath. Cables under spring tension can also whip when they let go—they cut.
What we do when we arrive 1. Secure the door with vise grips on the track 2. Release any remaining spring tension safely 3. Remove both old cables (we always replace in pairs) 4. Install new galvanized 7×19 aircraft cables matched to your drum 5. Re-spool the cables to spec 6. Test the door balance and re-calibrate the opener 7. Lube the drums and inspect the springs while we're in the system
Most cable jobs in Chattanooga finish inside 90 minutes for $185–$285.
Why we always replace cables in pairs Cables wear at the same rate. Replacing only the failed cable guarantees the other one fails within months—and you're back where you started.
Galvanized vs. stainless cables for Chattanooga We default to galvanized 7×19 cables for residential doors—they're the right balance of rust resistance and cost for our climate. Homes on Signal Mountain, Lookout, and near the river get an upsell to stainless when humidity exposure is extreme. Either way, you'll get 7–12 years out of the new set.
FAQs **Can I drive my car through the garage with a snapped cable?** No. The door could drop with no warning.
How much does cable repair cost in Chattanooga? $185–$285 for a pair of new cables, drum inspection, and a balance check.
Do I need new springs too? Not always—but if the springs are over 7 years old and the cable just snapped, replacing both together saves a second service call.
More reading - [Garage door cable repair Chattanooga](/garage-door-cable-repair-chattanooga) - [What causes garage door cable failures](/blog/what-causes-garage-door-cable-failures) - [Emergency garage door repair](/emergency-garage-door-repair-chattanooga)
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Call 423-583-9355