The fault we see most in Seymour is a door that looks fine standing still but is actually running on a spring that's lost tension gradually over decades, not all at once. The opener compensates by working harder, which wears the gears, which eventually strips them - so what started as a spring problem shows up as a dead opener, and a homeowner replaces the opener without ever fixing the spring underneath it. Six months later the new opener's gears are stripped too.
Cold is the other half of it. In a severe cold climate, steel contracts, lubricant thickens, and a door that was marginal in October seizes up hard in January.