The Cost of This Job
A straightforward cable replacement - swapping both cables and the drums as a set, which is the right way to do it rather than just the one that broke - costs less than most of the repairs we see on these original torsion setups, because the parts are standard and the labor is predictable. What pushes the number up is condition, not age alone: if the spring that shares the shaft with those drums is also original from 1975, replacing it at the same time saves you a second call, not a second markup. We'll quote both options on site rather than guess over the phone, because a cable that snapped from wear is a different job than one that snapped because a spring gave out first and dumped the load on it.
Why This Fails Locally
Bonita's mild climate doesn't put much stress on steel cable through heat or ice, so when these cables go, it's almost always straight fatigue - thousands of open-close cycles on hardware nobody's touched since the house was built. That's the trade-off with houses from this era: no rust-through from weather extremes, but no reason for a cable to have ever been replaced either, so a lot of homes are running on wire that's outlived its design life by decades. We also see drums worn oval from the cable riding in the same groove for 49 years, which is its own failure waiting behind the obvious one. In an area with 4,672 households, most built in that same stretch, it's a pattern we see house after house, not a one-off.
How We Fix It
We don't just replace the broken cable. On a door this age, we pull both cables and drums as a matched pair, check the torsion spring for wear at the same time, and look at the bottom brackets where the cable anchors - those brackets rust from the inside out and nobody sees it until a cable pulls loose. We set the new cable to the correct drum wind and test the door through a full cycle with the opener disconnected, by hand, before we hand it back to the opener. That catches drag or binding that an opener's motor can mask for months before it finally burns out trying to compensate.
Where This Job Goes Sideways
The honest limitation: if the cable snapped because the door jumped its track and got bent, cable repair alone won't fix it - you're into track and roller work too, and we'll say so rather than replace a cable that's just going to fray again against a bent rail. The other place this goes sideways is on doors where the drums are worn oval from decades of use; a new cable on a bad drum just wears through faster, so if the drums are shot, we replace them, not patch around them. We'd rather tell you that up front than have you call us back in six months for the same cable.
