Catalina Foothills sits about 10 miles from our shop in Tucson, and the housing stock out here runs older on average than a lot of the newer subdivisions closer in - median build year around 1985. That means original torsion springs, original steel tracks, and in a lot of cases the original opener, all of it now decades past the point most manufacturers expect it to still be working. Add in the severe heat this region sees, and you get metal fatigue nobody planned for: springs lose tension faster in high heat cycling, plastic gears in older openers get brittle and crack, and lubricant in original rollers cooks off and leaves bare metal grinding against the track. We see a lot of doors out here that have never had a spring replacement since the house was built - which, done on a 1985 house, is close to 40 years of load cycles on one set of coils.