Most of the garage doors we get called out on in Aurora sit on houses built between 1958 and 2005, with the bulk of that stock going up in the 1980s and 90s. That matters because a torsion spring has a rated cycle life, and a door installed when a house was built in, say, 1981 has been through several spring replacements by now whether the owner knows it or not. Add Aurora's severe cold winters into the mix and steel contracts, lubricant thickens, and a spring that was already near the end of its life gives out on the first hard freeze of the season. We see the same pattern across the 22 named areas that make up this housing wave - it's not one neighborhood, it's the age of the stock plus the climate acting on it at the same time. A door that worked fine in October can snap a cable or a spring in December with no warning, because cold doesn't cause the wear, it just finishes the job the years already started. Newer builds in the service area don't show this pattern nearly as often, which tells you it's the combination of original hardware and winter load, not bad luck.