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Home · Blog · Garage Door Won't Close? 5 Things to Check, Safest First
By Matthew Heard, Owner · October 1, 2026

Garage Door Won't Close? 5 Things to Check, Safest First

A garage door that won't close, or starts down and then goes back up, is one of the most common garage door problems. Often it is something you can fix yourself in a couple of minutes. Work through these five checks in order — safest first — and stop the moment you see a broken spring or cable.

1. Check the safety sensors

What to check

Near the bottom of each track is a small "photo eye" sensor, one on each side, aimed at each other. Check that:

  • Both lights are steady. On most openers each sensor has a small LED. A blinking or dark light means the sensors can't see each other.
  • The lenses are clean. Dust, cobwebs, pollen and salt film block the beam. Wipe them with a soft, dry cloth.
  • They are lined up. Sensors get bumped by cars, bikes and bins. Loosen the wing nut, aim the sensor at its partner until its light goes steady, and tighten it.
  • The sun isn't shining into one. Low afternoon sun can blind a sensor, so the door works in the morning and fails around 5 PM. Shading the sensor usually fixes it.

What it means

If the opener lights blink and the door reverses as soon as it starts down — even with nothing in the way — the sensors are the cause most of the time.

When to stop and call

If the lights stay dark after cleaning and aligning, the sensor or its wiring has failed. That is a quick repair.

2. Look for an obstruction in the door's path

What to check

Look along the floor under the door and up both tracks for anything in the way: a bin, a tool, a bent piece of weatherstrip, a rock in the track. Check the tracks by eye only — don't reach into them while the door is moving.

What it means

If the door stops or reverses at the same spot every time, something is catching there — an object, a bent track, or a damaged roller.

When to stop and call

If a track is bent, a roller has popped out, or the door is crooked, stop using it. See off-track door reset.

3. Opener limit and force settings

What to check

The opener has two settings: the travel limit (how far the door goes down) and the force (how hard it pushes before deciding something is in the way). If the door touches the floor and immediately goes back up, or stops a few inches short of the floor, one of these is usually off.

What it means

Settings can drift over time, after a power surge, or after other repairs. They can also be set to hide a different problem, like a door that has gotten heavy because the springs are weak.

When to stop and call

Your opener's manual covers adjusting the limits. Never turn the force up to "make it close" — that defeats the safety reverse. If adjusting doesn't fix it, have the door and opener checked.

4. Look for a broken spring or cable — but don't touch

What to check

  • A two-to-three-inch gap in the spring on the bar above the door
  • A loose, frayed or hanging cable at either bottom corner
  • The door hanging crooked, or feeling far heavier than usual
  • The opener humming or straining but the door not moving

What it means

Springs carry the weight of the door. When one breaks, the opener is suddenly trying to move the full weight on its own, and it often stops or reverses.

When to stop and call

Right away. Stop using the opener, unplug it, and keep everyone away from the door. Springs and cables are under high tension and are not a DIY repair. Read what to do when a spring breaks.

5. Remote, keypad and wall button

What to check

  • Lock / vacation button. Many wall controls have a lock that disables remotes and keypads. Look for a lock light on the wall control.
  • Batteries. If the wall button works but the remote doesn't, try a fresh battery.
  • The wall button itself. Hold it down. If the door closes while you hold it but not with a single press, that points back to the sensors (check 1).

When to stop and call

If nothing works from any button and the opener has power, the opener's logic board or motor may have failed. See opener repair and opener installation.

Garage door won't close: common questions

Why won't my garage door close?
The most common cause is the safety sensors near the bottom of the tracks: blocked, dirty, misaligned or blinded by sunlight. Next are an obstruction in the door's path, opener limit or force settings that have drifted, a broken spring or cable, or a remote or wall-control problem.
Why does my garage door open but not close?
If it opens fine but won't close, the safety sensors are the usual cause, because they only stop the door when it is closing. Check that both sensor lights are steady, clean the lenses, and re-aim them at each other.
Why won't my garage door close all the way?
If it stops a few inches short or goes back up after touching the floor, the opener's travel limit or force setting is usually off. A bent track or a worn roller catching at the same spot can also cause it.
My garage door won't close and there is no obstruction. What now?
With nothing in the way, look at the sensors first: steady lights, clean lenses, no direct sun. If those are fine, check the opener's limit settings, then look (without touching) for a gap in the spring or a loose cable.
Why won't my garage door open or close at all?
If nothing moves the door from any button, check the lock button on the wall control and that the opener has power. If the opener hums but the door doesn't move, a spring may be broken — stop and call.
Is it safe to keep using a garage door that won't close?
Not if you see a broken spring, a loose cable or a crooked door. Unplug the opener and keep everyone clear. Sensor or settings problems are safe to troubleshoot.

Still won't close? Get a free inspection.

I'll diagnose it with a free 25-point inspection and give you an exact flat-rate, out-the-door price before any work starts. 24/7 dispatch available across Miami-Dade and Broward.

📞 Call (786) 575-3463

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