Cables don't get the attention springs do, but they do just as much work. Two steel cables run from the bottom brackets of your door up to the drums mounted on the torsion shaft, carrying the spring's lifting force to the door itself. When a cable fails, the door can drop suddenly, hang crooked, or come off track entirely — and unlike a spring snap, a cable failure often happens with less warning. Here's what to watch for before that happens.
Each cable is made of dozens of thin steel strands wound together. Over time, especially where the cable wraps around the drum or bottom bracket, individual strands can break and stick out like tiny wires. This is the clearest visual sign of a cable nearing the end of its life. If you see any fraying, treat it as urgent — a cable in this condition can fail without further notice.
Because a cable runs on each side of the door, a partial failure on one side often shows up as one corner of the door sitting lower than the other, or the door binding as it moves. If your door looks tilted when it's down, or you notice more resistance on one side during opening, one of the cables is likely stretching, slipping off the drum, or starting to fail.
Sometimes the first sign is the failure itself — a loud bang, and then the door won't move, or it drops partway and stops. If you look up and see a cable hanging loose or coiled at the bottom of the door instead of running taut to the drum, stop using the door immediately and call for service. Do not attempt to force the door open or closed.
Utah's freeze-thaw winters and irrigation overspray in the summer both contribute to rust forming on cables and the hardware they run through. Rust weakens the individual strands from the inside out, often before any fraying is visible from a distance. A yearly inspection catches this before it becomes a failure.
A garage door can weigh 150 to over 400 pounds depending on size and material. When a cable lets go, that weight is no longer evenly supported, and the door — or the spring system still under tension — can move unpredictably. This is not a repair to attempt yourself. Cables work under high tension alongside the torsion springs, and handling them without the right tools and training is genuinely dangerous.
When we replace a cable, we replace both cables as a pair, even if only one shows damage — the other side has seen the same wear and is usually not far behind. We also inspect the drums, bottom brackets, and rollers while we're in there, since a failing cable is often a sign that other hardware is due for attention too.
If you've noticed any of these signs, don't wait for the loud bang. A same-day cable inspection is quick, and catching it early is a lot cheaper — and safer — than dealing with a door that's dropped.
Atlas Garage Door Service serves all of Utah County, Salt Lake County, and Juab County. Same-day appointments available — call or text now.
📞 Call 385-200-1517