Two things drive most of the opener calls we see in this part of the service area. First, the age of the housing stock - a lot of Lenoir City homes are 40-plus years old now, and openers simply don't last that long without at least one major part failure, sometimes two. Second, the climate band here is moderate-cold rather than mild, and the seasonal swing matters more than people expect: a gear or board that's been degrading slowly all year tends to finally give out on the first hard cold snap, not in the middle of summer.
Humidity and temperature swings also affect the lubricant in older chain and screw drives, which is why a door that sounds fine in July can start grinding by December. None of this is specific to one house - it's a function of how old the opener fleet is across this whole stretch of the county, and it's why a big share of our Lenoir City calls cluster in the colder months.