Housing across this service area was built mostly between 1987 and 2005, with a median year of 1997 - which means a large share of garage doors and openers out there are now thirty-plus years into service life on original or first-replacement hardware. That's old enough for spring steel to fatigue and for nylon gears inside the opener housing to go brittle.
The HEAT severity rating for this climate band matters more than people expect. Summer heat swells wood jamb framing and dries out factory lubricant on rollers and hinges faster than it would in a milder climate, which is why rollers here tend to squeal and bind years before the rest of the door shows wear. Steel tracks also expand slightly in direct afternoon sun, which is enough to throw alignment off on doors that were already running close to tolerance.
Across the 32 named areas in this stretch of the valley - most carrying the same 1980s-90s housing stock - we see the same failure pattern repeat: spring first, rollers and track hardware second, opener gear last.