Can You Do This Yourself
A torsion spring is wound under enough tension to break a wrist or worse, and that doesn't change because your house is only 494 households deep into a quiet pocket off the highway. If you've got the winding bars, a plan, and you've done it before, that's your call to make. If you're reading this because the spring already let go and the door's sitting half open, don't force it with the opener - that motor isn't built to lift a door with a dead spring and you'll burn it out trying. We won't talk you through winding one over the phone. That's the one limitation worth saying plainly: some of this job is teachable, and the spring tension part isn't, not safely, not from us, not today.
The Complications
Houses in Mountainaire mostly date to 1986, a year off Flagstaff's own median of 1985 - close enough that it's the same generation of door hardware across the whole area, torsion springs on standard brackets rather than anything newer. The complication isn't the door, it's the climate band this whole region sits in: severe cold cycles the spring steel harder than a mild climate would, so springs here fatigue and snap sooner than the rated cycle count on the box would suggest. A 30-year-old spring on a door that's barely been touched can still be due. Add in that nobody's replaced the opener's force settings to match a new spring, and you get a door that slams the last six inches or won't seat on the floor - not a second failure, just the first one left half-fixed.
The Cost of This Job
We don't have a posted price to quote you here, and we're not going to make one up - it depends on spring size, whether it's one or two, and what the door weighs. What we can say is that a household budget here runs well above the regional norm, with median income around $94,457, and that doesn't change what the job costs, only how it gets decided. Replacing a single worn spring is cheaper than letting it take the cables or the bottom bracket with it when it fails, which is the real argument for fixing it now rather than waiting for it to go in the middle of winter when the steel's already working harder than it should.
