Can You Do This Yourself
A torsion spring is wound under enough tension to hurt you badly if it lets go while you're working on it, and that risk doesn't change because the house is newer or the neighborhood is nicer. If your door's original 1973-era spring has never been replaced, the winding cones and the shaft itself may be original too, and old cones strip or crack under a winding bar in ways you can't predict from the outside. We're not going to pretend this is a weekend project with the right tools and a video. If you're set on DIY, the one thing we'd say is: don't attempt it on a double door with two springs, since an uneven release on those is where most garage spring injuries happen. Beyond that, call it in.
What You Are Seeing
The door won't lift, or it lifts a few inches and stops, or the opener strains and reverses itself. Sometimes there's a loud bang from the garage, which is the spring letting go, not the opener. On older torsion setups like the ones common in Cupertino's 1973-era construction, you'll also sometimes see a visible gap in the coil where the spring has separated, or the door sits crooked in its frame because only one spring on a double-spring door failed and the other is still holding partial tension. That uneven load is its own hazard and one more reason not to force the door open manually.
What You Pay
Pricing depends on whether it's a single spring or a matched pair, the spring size for your door's weight, and whether the drums or cables need replacing alongside it. We don't post a flat number here because a double-spring job on an original 1973 setup with worn drums costs more than a single spring swap on a door that's already been serviced. We'll give you the number before we start the work, not after.
How to Book
We cover Cupertino from our Santa Clara location, about 5 miles out, along with the rest of the areas near Cupertino we service. For the full rundown of what we do beyond spring repair, see our Santa Clara garage door page. To get a truck out for a broken spring, give us a call and describe what the door's doing - a bang, a stuck lift, a crooked sit - and we'll bring the right spring size the first trip.
