Cable Repair for Los Altos Garage Doors

Time on the Job

We're coming from Campbell, about 10 miles out, so we don't pretend to have a branch on this side of the hill. What we do have is a read on what a snapped cable means for a Los Altos door before we open the panel. With a median household income of $250,001 here - well above the $188,558 average across the rest of the territory we cover - the math on a cable repair looks different than it does three towns over. A $200-$300 cable job on a door that's otherwise sound is an easy yes. A cable failure on a door that's already warped, rusted at the track, or running on a 30-year-old opener is a different conversation, and at this income level most owners would rather replace than keep feeding a tired door one repair at a time. We'll tell you straight which side of that line your door is on before we start pulling parts.

Stocked Parts

Los Altos sits in the stretch of the service area where housing runs 1947 to 1985, with a median build year of 1964 - and that matches almost exactly what we see on the doors here. A door from that era usually has galvanized aircraft cable on a drum-style or extension-spring setup, not the newer torsion-cable lift systems you find on anything built after the mid-80s. We carry both, but the galvanized 1/8-inch cable, the right drum size for a mid-century low-headroom track, and matching safety cables are the parts that get used most on this side of the route. If your door's been re-sprung or converted since it was built, we check the hardware on site rather than assume it still matches the house's age.

What the Fix Involves

A broken or frayed cable on a double door almost never shows up alone - once one side lets go, the door racks sideways and the opener strains against bent track or a bowed panel. We unload spring tension first, pull the old cable and drum, check the drum groove for wear, and run new cable at the correct wrap before we reset tension. On a single door with a snapped cable and nothing else wrong, this is a same-visit fix. On a double door that's been dragging on one side for a while, we also check the track alignment and the rollers before we close it back up, because cable alone won't fix a door that's been running crooked for weeks.

Why This Fails Locally

Mild temperate conditions mean Los Altos cables don't fail from freeze-thaw cracking or road salt the way they would somewhere colder - the failures we see here are almost all fatigue and corrosion from age. A cable installed when the house went up in the 1960s has had sixty years to work-harden at the drum, and the strands start fraying one by one at the same spot every time, right where the cable first wraps the drum. We don't see sudden snaps from storm damage here; we see slow fraying that an owner either notices as a slightly crooked door or doesn't notice until the cable lets go completely. That's the version we get called for most.

The Symptom

The door looks tilted - one corner drops lower than the other when it's open, or it slams down fast and uneven on the last foot of travel. Sometimes you'll hear a sharp snap and the door won't move at all, stuck halfway with the opener straining. If you see frayed strands sticking out near the bottom bracket or the drum at the top of the track, that cable is close to going and it's worth getting looked at before it fails mid-cycle with the door half open, which is the scenario that actually damages the track.

Doing It Yourself

We'll say this plainly: don't try to replace a cable yourself while the spring is still under tension. The spring is what holds the lifting force, and an extension or torsion spring on a door this size can cause real injury if it releases while you're working near it. If the door is already down and you just want to inspect for fraying, that's safe to do with the opener unplugged. Beyond that, cable work under tension is one job we'd rather you call in than attempt - it's not a matter of skill, it's a matter of what happens if it goes wrong.

Frequently asked questions