Housing in this service area was mostly built between 1973 and 2012, with the heaviest stretch in the 1980s and 90s, across the eight areas this crew covers - Elkmont, Harvest, Trinity, Ardmore, Triana, Redstone Arsenal, Priceville, and Rogersville, all within a dozen or two miles of Athens. That means a lot of original or first-replacement openers are now thirty-plus years old, well past the point where gears, capacitors, and logic boards are expected to hold up.
The cold winters typical of this part of north Alabama are the other half of it. Cold stiffens the grease in an aging drive system, which makes the motor work harder to start the door moving - that extra load is what finally strips a gear that was already worn thin. Cold also shrinks battery capacity in remotes and wall sensors, which is why a remote that worked fine in October can quit outright in January.
Across the 7,629 households in this area, with 6,078 of those owner-occupied houses, most openers were installed once and never serviced - nobody greases a drive gear until it's already grinding.