Why It Happens Here
Most of the housing stock in this part of the South Bay went up between 1947 and 2012, with a heavy concentration in the 1960s and 70s across the 24 named areas we work in. That matters for openers because a house built in that window usually got its garage wired for a chain-drive unit on a wood or steel jamb that has settled since - the header shifts a fraction of an inch over sixty years, and the travel limits that were set correctly in 1971 are not correct now. That shows up as an opener that reverses on close, grinds at the top of travel, or runs the motor without moving the door.
The climate band here is mild temperate, so we don't see the swings that crack circuit boards or freeze lubricant the way colder regions do. What we do see is salt-laden air working slowly on exposed logic boards and drive gears over decades, especially on units that were never upgraded past their original capacitor and gear set. A 1968 house with its original 1968-era opener, or a 1985 replacement that's now pushing forty years, is a common combination out here - not because the town is unusual, but because the original construction wave never got fully replaced.
