The service area sits in a severe cold climate band, and that matters more in Progress than the build year alone would suggest. A spring manufactured around 1960 has already been through six decades of freeze-thaw cycling - steel contracts in the cold, expands when the garage warms during the day, and that constant flex is what finally fatigues the coil past its limit. It's rarely one dramatic storm; it's the accumulated cycling finally catching up on a below-freezing morning when the metal is at its stiffest and least forgiving. Non-insulated panels common to that era also let cold air sit directly against the steel, which stiffens the hinges and rollers right when you need them to move smoothly. None of this is unique to any one house in Progress - it's the predictable result of 1960s-era hardware sitting in a climate that puts real stress on steel every winter. That's the failure pattern we plan for before we even leave Harrisburg.