Garage door off track: why it happened and what not to do

What off-track actually means

The rollers on the edge of each section run inside a steel track. Off-track means one or more rollers have left that channel. The door then hangs at an angle, jams against the frame, or wedges partway and won't move in either direction.

The four causes

A snapped lift cable. The cable on one side lets go, that side drops, the door skews and the rollers pop out. This is the most common cause by a wide margin.

An impact. A bumper, a ladder, a trailer hitch. Even a light knock can push a roller out or crease a track just enough.

A failed roller. Old steel rollers seize, wear flat, or lose their bearing and drop out of the channel.

Loose track brackets. Vibration works the lag bolts loose over years until the track shifts away from the door.

Why you must stop using the opener

The opener has no idea the door is off track. It will keep pulling, and a pull against a jammed door bends sections, creases tracks, tears hinges out of steel and can rip the opener bracket off the header.

A straightforward off-track repair typically runs $145 to $325. A door that's been forced through three more cycles becomes bent sections and replacement track, and at that point you're looking at four figures.

Securing it before help arrives

Unplug the opener so nobody else in the house presses a button. If the door is stuck partway open, clamp locking pliers onto the track just below a roller on each side to stop it dropping further. Don't stand under it, and don't try to lever it back in with a pry bar — the door can come down under its own weight.

What the repair involves

The technician lifts the door back into the channel, replaces whatever failed — usually a cable, sometimes rollers — straightens any light track bends, re-winds the drums so both cables have equal tension, then re-balances and cycles the door. Most jobs take 60 to 120 minutes.