Cable Snapped or Fraying?
Don't Wait – It'll Get Worse.

How Garage Door Cables Actually Work

Most homeowners never think about their cables until one fails. Understanding what they do — and why they fail — helps you catch problems before they become emergencies.

Garage door cables run from the bottom corners of the door upward to grooved drums mounted on the torsion spring shaft above the door opening. The cables don’t actually lift the door — the springs do. The cables’ job is to transmit the spring’s force to the door and guide the movement precisely. When the door opens, the spring energy unwinds, the drums rotate, and the cables wind up around the drum groove. When the door closes, the drums pay the cable back out, lowering the door in a controlled way.

What this means in practice: the cables are under the full weight and tension load of the door on every single cycle. A standard two-car garage door weighs 150–250 pounds. Every time you open or close the door, that load is cycling through the cable from the anchor point at the bottom bracket up to the drum. Over thousands of cycles, that stress accumulates — especially at the end points, where the cable bends around the drum edge or is swaged into the bottom bracket fitting. Those are the spots that fail first.

DFW’s climate doesn’t help. The combination of summer humidity and occasional winter freezes creates thermal stress on the cable strands and accelerates surface rust, especially if the cable hasn’t been lubricated periodically. We use galvanized steel cables rated for your door’s specific weight — not the undersized, off-the-shelf cable that some shops stock as a one-size-fits-all solution. The correct gauge for a 200-pound door is meaningfully different from what a 100-pound door needs.

Cables typically last 8–15 years with normal use. Annual maintenance is the best way to catch a fraying cable before it snaps — our tech can spot early wear you’d never see from a normal standing position.

What Happens When You Ignore a Fraying Cable

A fraying cable is one of the most tempting problems to ignore. The door still works — mostly. Maybe it opens a little slower, or sounds a bit rougher than it used to. It’s easy to tell yourself it can wait. It can’t.

A cable doesn’t give much warning before it fully snaps. Once it does, the door loses support on one side and can drop suddenly. On a door that weighs 150–250 pounds, that drop is not slow and gentle — it happens fast. If a vehicle, pet, or person is underneath when it goes, the consequences are serious. Even without injury, the sudden drop can crack or bow the door panels, damage the opener, bend the track, and pull the remaining hardware out of position — turning a $150 cable replacement into a $600–$800 repair job.

Running the opener after a cable has snapped or started seriously fraying adds more damage fast. The motor doesn’t know the cable is compromised — it just knows the door hasn’t reached its target position, so it keeps trying. That puts continuous strain on the drive mechanism, the remaining cable, and the door itself.