How to fix a garage door that fell off the track?

To fix a garage door that fell off the track, where one or more rollers have come out of vertical or horizontal tracks and door is crooked or jammed, you need to realign tracks and rollers safely without forcing door, as forcing can cause further damage and injury. First, stop using automatic opener and pull red emergency release cord to disconnect opener trolley so door moves manually. Do not try to operate opener with off-track door, as it can damage opener gear and bend panels. Secure door to prevent falling by clamping locking pliers or C-clamps onto tracks just below rollers on both sides, and if door is open, place ladder underneath for extra support, as doors weigh 150 to 300 pounds. Inspect cause such as hit by car, broken cable, broken spring, loose track bolts, or worn rollers. If cable broken or spring broken, call professional, as those are high tension repairs. If tracks are only slightly bent and cables intact, loosen track mounting bolts slightly, not fully removing, so you can pry track open gently with pry bar to create space. With help of another person, lift door evenly and guide rollers back into track channel, starting from bottom rollers and working up. Once all rollers in track, tighten bolts, ensure tracks are plumb, parallel, and spaced half inch from door edge, and that horizontal tracks are level. Lubricate rollers and test manual operation halfway for balance before reconnecting opener and testing automatic. Professional off-track repair costs 125 to 400 dollars.