What to Check
Before you call anyone, look at three things. First, the vertical tracks on both sides of the door - stand back and sight down each one from top to bottom. If one bows outward more than the other, that's your problem side. Second, check the lag bolts at each bracket along the track. On a house from the 1980s or 90s, it's common to find brackets that spin freely by hand; that slack is enough to let a roller walk out of the channel on a cold morning when the steel is stiffer and less forgiving.
Third, look for ice or packed snow inside the track itself, especially near the bottom few feet. In this climate, meltwater from snow on the door slab runs down and refreezes overnight, and a roller hitting a chunk of ice at speed is a common way a door jumps track on a cold morning rather than a mild one.
What you shouldn't do is force the door up or down once it's visibly off track. That bends the roller stem or cracks a panel, and turns a bracket tightening job into a track replacement.
The Problem
The underlying issue in most of these calls isn't a single dramatic failure - it's cumulative. A house built in the 1980s or 90s has had thirty-plus winters of expansion and contraction working on the same set of lag bolts. Add a rollers-and-track system that was never upgraded, and you get a door that's slowly drifting out of square with itself. One side's brackets loosen faster than the other, usually the side that gets more direct sun or more wind-driven snow, and the track twists a few degrees out of parallel.
Once the tracks aren't parallel, the door doesn't ride evenly - it favors one side, and a roller eventually catches the edge of the rail and pops free. That's the moment a homeowner sees as sudden, but the setup for it took years. This is also where an honest limitation matters: if the track itself is bent rather than just loose, straightening it rarely holds for long in this climate. A bent track under repeated cold-stress cycling tends to re-bow, and replacement is usually the better call than trying to save it.












