Minneapolis and its close suburbs sit in a cold-climate zone with real winter severity, and a door built in the early 1960s wasn't engineered with that kind of season count in mind the way current doors are. Steel contracts in the cold, and on a 60-year cycle of freeze and thaw the torsion spring's coil tension shifts more than most owners realize until the day it doesn't hold anymore. Columbia Heights sits about 6 miles from our Minneapolis base, close enough that we see a lot of these same-era homes across this side of the metro, and the pattern repeats: original springs, original drums, and tracks that were never resized when a heavier opener got bolted on later. Across the wider service area the housing stock runs from 1952 to 2003 with a median around 1975, but Columbia Heights leans older than that median, which means more of the doors we see here are original or close to it, not a later remodel-era replacement.