Minnesota's cold band is severe, and a garage built in the late 1980s or 1990s in this part of the state usually has steel doors with foam insulation that's now 30-plus years old. Insulation that old compresses and loses R-value, and the steel panel skin contracts in deep cold, which puts extra stress on hinges and torsion springs right at the coldest point of winter - the point where they're already working hardest to lift a heavier door. Springs in this climate band are rated for a set number of cycles, and cold weather shortens that life rather than extending it, so a spring that's lasted a decade can go without warning on a sub-zero morning. Rollers on 30-year-old track also tend to be the original nylon or steel ones, and by now they're usually worn enough to bind or jump the track under cold-stiffened grease. None of that is a Champlin-specific defect - it's just what happens to garage hardware of this age in a climate this cold, and it's why calls here cluster in the first hard cold snap of the season and again after a quick freeze-thaw cycle.