Most homeowners notice it the same way: the door stutters partway up, or one side visibly dips lower than the other while it's moving. Sometimes a roller has worked loose from its track entirely and is hanging by the hinge. Other times the door looks fine sitting still, but it binds or grinds when the opener tries to pull it, which is the track pulling the panel at an angle instead of straight up. On older doors in the service area, a bent track rail from a car bumper tap or years of minor flex is a common culprit. We also see it after storm-driven wind gusts rack a door sideways in its frame, which matches the moderate cold climate band this area sits in - freeze-thaw cycling loosens fasteners in wood jambs over time, and a loose bracket is often the first domino.