The climate band here is classified cold and severe, and that drives opener failures in a mid-80s house differently than it does in an older one. Original garages from that build era were framed to the standards of their time, which often means less insulation around the door opening than newer construction gets. Cold swings make the chain or belt tighten and loosen, grease on the rail gum up, and the travel limits on an aging logic board drift out of calibration. On a 1986-era unit, that usually shows up as the door reversing for no reason or stopping short of the floor.
The area's household income, at $172,325, is well above the broader Minnetonka-area median of $109,722, which tends to mean more owners who've already put in a mid-grade or upgraded opener rather than living with a stock builder unit for forty years. That shifts the failure pattern toward worn belt-drive gears and tired circuit boards rather than the fully seized chain-drive motors we see more often on the oldest housing stock elsewhere in the territory.