Garage Door Stuck Half Open: Causes and What to Do

A garage door that stops halfway is almost always telling you one of four things: a spring has lost its balance or broken, a cable has slipped or snapped, a roller or track is blocked or bent, or the opener's travel or safety settings are cutting the run short. Which one it is depends on what the door does when it stops, and the safest first move is to stop pressing the button and look from a distance.

Why does my garage door stop halfway?

The door stops because something is either too heavy for the opener, physically in the way, or telling the opener to stop. A well-balanced door moves smoothly through the whole run. When one part drifts out of adjustment, the opener senses extra resistance and shuts off as a safety measure. The pattern helps: a door that stops going up, stops going down, or stops and then reverses each point to different causes.

Could the springs be out of balance?

Yes. Springs weaken with age and cold, and a door that was balanced years ago can become heavy enough that the opener stalls partway. If the door feels heavy when lifted by hand or drops when released midway, the springs are the likely cause. A fully broken spring usually stops the door right away and may leave a visible gap in the coil. See our guide to a broken garage door spring for what to do next.

Can a frayed or slipped cable stop the door?

Yes. The lift cables run from the bottom corners of the door up to the drums at the top. If one slips off its drum or snaps, one side of the door hangs lower than the other and the door jams in the tracks. A crooked door is the clue. Do not try to straighten it by hand. Read about a snapped or frayed garage door cable before you do anything else.

Is something wrong with the tracks or rollers?

It can be. A bent track, a loose track bracket, a worn roller or dirt and ice in the track channel can all make the door bind. You may see a roller sitting outside the track, or hear grinding as it jams. Tracks should be straight, clean and firmly bolted to the wall and ceiling. A door that has left its track is a job for a technician, as covered in our page on a garage door that is off track.

Why would the door stop and then reverse on the way down?

A door that closes partway and then reverses is usually reacting to the safety system. Misaligned or dirty photo eye sensors, or anything blocking the beam, tell the opener to reverse. Binding or heavy resistance can trigger the same response. If your door reverses, check the sensors first, as explained in our article on garage door sensors not working.

Could the opener settings be wrong?

Yes. Openers have travel limits and force settings. If the up limit is set too low, the door stops short of fully open. If the force setting is too low, the opener gives up when the door gets slightly stiff in cold weather. These settings can drift over time or be changed by accident. Adjusting them will not fix a door that is out of balance, so if the settings look right and the door is still heavy, the problem is in the springs.

What should I do first when the door stops?

• Stop pressing the button. Repeated attempts can strain the opener.

• Keep people, pets and cars clear of the door.

• Look for a crooked door, a loose cable, a gap in a spring or a roller out of its track.

• Check the sensors, wipe the lenses and make sure nothing blocks the beam.

• Take a photo of the door from inside and outside.

How do I get my car out if the door is stuck open or half open?

If the door is stopped high enough and is not crooked, you may be able to drive out carefully, but only if nothing is hanging at an angle above the vehicle. If it is low, or you see any sign of a broken spring or cable, do not drive under it and do not try to hold it up. The red emergency release only disconnects the opener, and with a broken spring the door will be very heavy. Our page on a garage door emergency repair explains which problems cannot wait.

What is safe to do myself, and what is not?

Wiping sensor lenses, clearing debris from the bottom of the door and checking that a lock is released are safe. Anything touching springs, cables, spring brackets or the track is not. Those parts hold high tension, and a slip can cause serious injury. If the cause is not obvious in a few minutes, stop and call.

Who can fix it in the GTA?

Modern Empire Doors, at 138 Yorkland St, Richmond Hill, repairs stuck and misbehaving garage doors across the GTA, 24/7, and has served the GTA since 2018. Call 647-323-1826 and send a photo of the door from inside and outside. We will tell you what it looks like before we head out.