Doing It Yourself
Hallsville's median home was built in 1993, which means a lot of these garages still carry the original lifting cables that came with the door - nobody's ever had a reason to touch them until now. A frayed or snapped cable looks like a simple fix: pull the old one off the drum, thread a new one on, done. It isn't. The door is under spring tension the whole time you're working near that drum, and a cable job done with the spring still loaded is how people lose fingers or get hit by a door that drops without warning.
If you've got the tools, the winding bars, and you've done this before, fine. If not, this is one to leave alone. We'll say it plainly: a $15 cable and twenty minutes of YouTube is not worth a trip to the ER. The honest limitation here is that we can't talk anyone through this over the phone in a way that's actually safe - torsion spring tension has to be released and reset by someone standing there watching it happen.
What Can Go Wrong
On a door this old, the cable rarely fails on its own. Usually one of two things is going on. Either the galvanized coating on the original cable has worn through after three decades of cycling, leaving bare strands that fray and eventually snap, or the drum it winds onto has developed a burr or a flat spot that's been chewing through the cable from the inside. Replace the cable without checking the drum and you're back out here in six months with the same complaint.
The other common cause in houses from this era is a bottom bracket that's rusted or loosened at the mounting point, which lets the cable ride off-track and fray against the edge of the track itself. None of this is dramatic - it's just thirty-year-old hardware doing what thirty-year-old hardware does.
What You Are Seeing
The door hangs crooked, tilted hard to one side, or it's stuck a few inches off the ground and won't go further in either direction
Sometimes you'll hear a loud bang first - that's the cable letting go under tension - and then the door either won't move at all or drops fast and uneven. If one side still has cable and the other doesn't, the door will rack sideways in the tracks, which can bend the tracks themselves if the door's forced up and down on the opener.
A cable that's frayed but not yet broken usually shows itself as a scraping or grinding sound near the bottom corners when the door runs
Or a visible kink in the cable where it loops around the bottom bracket.
What the Fix Involves
We release the spring tension first, always - that's the step that makes the rest of the job safe. From there it's pulling the old cable off the drum and the bottom bracket, checking the drum face and the bracket for wear or rust, and running new galvanized cable sized to match the door's weight and the drum it winds onto. On a house built in the early 90s, we'll generally also check the opposite side cable even if it hasn't failed yet, since it's the same age and under the same wear.
If the drum is scored or the bottom bracket is rusted through, those get replaced along with the cable - patching a cable onto bad hardware just moves the failure point. Once it's back together, we re-tension the spring and run the door through a few full cycles to make sure it's tracking straight before we call it done.
