Elmhurst's median house went up in 1964, a few years past the 1959 median for the wider service area we cover out of Evanston. That gap matters more than it sounds. Homes built right around 1964 mostly came with steel sectional doors on extension-spring hardware, not the older wood one-piece slab doors on side-mount torsion springs you still find in the oldest pockets of our coverage. Extension springs run along the horizontal track instead of over the header, and they wear differently - the safety cables that keep a broken spring from whipping loose are the part we check first here, because a lot of these original setups predate the safety-cable requirement that came later. The cold winters that hit this whole area don't care what decade a door was built. Track rollers freeze, cables go brittle, and steel panels contract enough to bind against weatherstripping on the coldest mornings. On a newer steel door that shows up as a stuck opener cycling twice; on an older wood door it shows up as a cracked panel. Same climate, different failure depending on when the garage went up.