Farragut's housing runs newer than a lot of what we see across the wider service area, where the build years stretch from 1958 to 2003 with a median around 1989. Here the typical house went up closer to 1992, which puts a lot of doors and openers right at the edge of their expected service life - springs rated for roughly 10,000 cycles are hitting that number now, and chain-drive openers from that era are starting to strip gears rather than just need a tune-up.
The cold winters common to this part of the region add another layer: steel contracts, lubricant stiffens, and a spring that's been quietly fatiguing for three decades picks a cold morning to let go. It's not a coincidence that we see more snapped springs and frozen track complaints after a hard overnight temperature drop than any other time of year.