A broken torsion spring is the single most common garage door failure, and the most dangerous one to attempt yourself. Springs hold hundreds of pounds of stored energy.
We stock colour-coded torsion springs across the full gauge range on the truck, so a broken spring is almost always same-day. Springs are replaced in pairs where both are the same age, because a second break shortly after the first is otherwise near certain. Do not attempt this repair with hardware-store winding bars.