Most houses in Cherry Creek went up around 1982, and a lot of the lift cable on those doors has never been swapped out. That's forty-plus years of cold-weather flex on the same galvanized strand, and it shows up as fraying near the bottom bracket, a door that hangs crooked on one side, or a loud bang followed by the door refusing to move at all. If you catch a frayed cable before it snaps, the fix is quick. If it snaps while the door is up, the door can drop hard and fast, and that's not a job to leave sitting overnight. A door that's off-track or leaning to one side on the way down is almost always a cable problem, not a spring problem, even though owners usually guess spring first.