Northglenn runs about 14,718 households, and the median income here, just under $79,530, sits lower than some of the other towns Thornton crews cover. That matters for how repairs actually get handled: a lot of owners here are running original 1974-era hardware well past when a spring should've been replaced, because replacing a whole door is a bigger expense than fixing what's on it.
That's not a knock on anyone's maintenance - it's just what a fixed household budget does to a decision like this. The spring gets replaced when it breaks, not before, and the opener gets run harder than it should because nobody wants to spend on a new one while the old one still limps along.
The tradeoff is that repair, done right, on a torsion spring rated to the actual door weight, usually gets years more out of hardware that's already outlasted its original estimate. Full replacement makes sense when the door itself is cracked, warped, or missing panels no one stocks anymore - otherwise, in a town built mostly in the 1970s, a properly sized spring is usually the better dollar.