Doing It Yourself
A garage door cable runs under real tension, even when the door looks still. On a torsion system the spring is doing the pulling, and a cable that's frayed or jumped the drum groove can whip hard enough to break fingers or crack a windshield if you're standing in the wrong spot. We'd rather tell you that plainly than have you find out the hard way. If the door is already down and stuck, your safest move is to leave it alone and call someone who does this daily. If you're comfortable with basic tools, you can usually tell a frayed cable from a snapped one by looking at the drum - strands peeling off in a birdcage shape mean it's about to go, not that it already has. That's useful information to give us on the phone. Beyond that diagnosis, we don't recommend homeowners in La Vergne try to rewind or replace the cable themselves.
How It Shows Up
The most common sign is a door that hangs crooked - one side drops lower than the other because one cable has slipped off its drum or snapped outright while the other is still holding tension. You might also hear a loud pop followed by the door slamming or refusing to move at all. On the newer doors common in La Vergne, built mostly after 2000, the opener's force sensors often catch the imbalance before the door fully fails, so you'll sometimes see the opener struggle, reverse, or stop short rather than a dramatic collapse. Either way, a door that looks tilted in the track is not something to force open with the opener again - that's how a bent track or a torn panel gets added to a cable repair.
Parts We Carry
We stock standard galvanized aerospace lift cables sized for residential torsion doors, which covers the large majority of what we see on La Vergne's newer housing stock. We also carry extension-spring safety cables for the smaller number of older doors still running that setup. What we don't stock on the truck is cable for unusual or oversized commercial doors - those sometimes need an order, and we'll tell you up front if that's the case rather than let you wait on a truck that isn't coming with the right part.
How We Fix It
We release the spring tension safely, pull the damaged cable off the drum, and check the drum grooves and bottom bracket for wear before running new cable. Both cables get replaced together even if only one failed - the other is carrying the same age and the same stress, and replacing just one is a callback waiting to happen. Once the new cable is wound and seated, we re-tension the spring, balance the door by hand, and run it through a full open-close cycle before we call it done. For La Vergne specifically, a technician comes from our Brentwood location, about 12 miles away, so we schedule the trip rather than keep a truck parked nearby.
