Few things are more frustrating than a garage door that opens fine but refuses to close — or closes halfway and reverses. The good news is that most of the time it’s caused by one of a handful of issues, and a few are things you can check yourself in a couple of minutes. Here are the seven most common reasons a garage door won’t close, from easiest to fix to “call a pro.”
Start here: If your door reverses right before it touches the ground, the culprit is almost always the safety sensors near the floor — check those first (cause #1). If the door won’t budge or feels extremely heavy, suspect a broken spring (cause #4) and stop forcing it.
Every garage door built since the early 1990s has two small photo-eye sensors mounted a few inches off the floor on each side of the opening. If their invisible beam is broken — or the two sensors aren’t pointed at each other — the opener refuses to close as a safety measure. This is the #1 cause of a door that won’t close.
Quick check: Look for a bin, broom, or cobweb blocking a sensor, and wipe the lenses clean. Then check the little indicator lights — if one is blinking, the sensors are misaligned. Gently nudge one until both glow steady.
Arizona dust builds up fast, and a pebble, hardened grease, or a dented spot in the track can stop the rollers from traveling all the way down. Look along both tracks for debris or a bent section.
Quick check: Clear any obvious debris and wipe the tracks. If you see a dent or bend, don’t try to hammer it back — that usually makes alignment worse. A tune-up is the safer fix.
Your opener has “travel limits” that tell it how far to move the door. If the down-limit is set too far, the door hits the floor, thinks it’s hit an obstacle, and reverses. This often happens after a power outage or as an opener ages.
Quick check: Most openers have small limit-adjustment screws or buttons (see your opener’s label). Small adjustments only — if you’re unsure, an opener repair visit will dial it in correctly.
If the door won’t move at all, or the opener strains and gives up, a broken torsion spring is a prime suspect. Without a working spring, the door is far too heavy for the opener to lift or lower safely. You may have heard a loud “bang” earlier — that’s the spring snapping.
What to do: Don’t force it. A broken spring is a same-day spring repair and should be handled by a professional because the springs are under extreme tension. (Curious what it costs? See our spring replacement cost guide.)
The lift cables work alongside the springs to raise and lower the door. If one frays or slips off its drum, the door can hang crooked, bind, or refuse to close evenly.
What to do: A hanging or snapped cable makes the door unsafe to operate — leave it and book a cable replacement. Cables are replaced in pairs for balance.
Sometimes the door itself is fine and the signal is the problem — a dead remote battery, a keypad that lost its code, or a wall button that’s stuck.
Quick check: Try closing the door from the wall button. If that works but the remote doesn’t, replace the remote battery or reprogram it. Our opener troubleshooting guide walks through this step by step.
The opener’s auto-reverse is designed to stop for anything in the way — a garbage can, a garden hose, even a buildup of ice or debris along the bottom seal. Worn or rusty rollers can also cause the door to catch and reverse.
Quick check: Clear the threshold and the door’s path, and look at the rollers as the door moves — if they’re wobbling or grinding, they’re due for replacement, which a maintenance tune-up covers.
The sensor, track, and remote checks above are safe to try yourself. But anything involving the springs, cables, or a door that’s off-balance should be left to a technician — those parts are under high tension and are a common source of DIY injuries. If your quick checks don’t solve it, or the door is behaving unpredictably, it’s worth a professional diagnosis. In Gilbert, we offer same-day service and a flat, upfront quote before any work — request a free quote or call and we’ll get someone out fast.
Dealing with the opposite problem? See why your garage door won’t open and the 8 most common causes.
That is the safety sensors reversing the door because they detect something in the beam — often just dirty or misaligned photo-eyes. Clean the lenses and make sure both sensors point at each other with steady lights.
A door that stops short or reverses near the floor is usually a sensor or travel-limit issue. Check for obstructions and dirty sensors first; if it persists, the opener’s close-limit setting may need adjusting.
Yes. A broken spring can leave the door unbalanced so it won’t close properly or safely. If the door feels heavy or looks crooked, stop using it and have the spring checked.
A blinking sensor light means the two photo-eyes aren’t aligned, or one is blocked or dirty. Clean the lenses and gently adjust the sensor until both lights glow steady.
No. Holding the wall button to force it closed overrides the safety sensors and can be dangerous. Fix the underlying cause instead.
