Town 'n' Country sits in the same mild temperate climate as the rest of the Clearwater service area, so you're not dealing with freeze-thaw cycling the way a spring in a colder state would. What does the work here is heat and humidity cycling on a daily basis, plus straight fatigue - a torsion spring is rated for a set number of open-and-close cycles, usually somewhere around ten thousand, and a door installed in the 1980s has had forty-odd years to use them up.
For a neighborhood built mostly in that one era, that means a lot of springs are aging out around the same window, regardless of brand or install quality. It's less about a bad batch and more about the math: a spring rated for ten thousand cycles, used twice a day, runs out well inside a normal homeownership. With median household income in the area close to $68,350 - lower than the broader service area's $84,220 - we also see more owners asking us to replace just the spring rather than the whole door assembly, which is usually the right call if the track and rollers are still sound.