Garage Door Won't Close? 7 Causes, From Free Fix to Service Call

Published June 11, 2026

A garage door that won’t close is the most common opener complaint in America — and the good news is that the two most frequent causes are free, five-minute fixes. Work down this list in order.

1. Blocked or dirty safety sensors (the #1 cause)

Look at the two small “photo-eye” sensors mounted on each side of the door, about six inches off the floor. They project an invisible beam; if anything interrupts it, the door refuses to close or reverses immediately — usually while the opener light flashes.

Check for: a rake handle, a leaf pile, a bike pedal, a cobweb. Then wipe both lenses with a soft cloth — dust, pollen, and (in desert metros) haboob grit fog them gradually. In Atlanta this is the classic April pollen call; in Phoenix it follows every dust storm.

2. Misaligned sensors

Each sensor has an indicator LED. If one is dark or flickering, the pair has been knocked out of alignment — a broom handle or a kicked sensor bracket is usually the culprit. Loosen the wing nut, adjust the sensor until its LED glows steady, and retighten. This fixes a huge share of “won’t close” calls at zero cost.

3. The door closes only if you hold the wall button

This specific symptom is diagnostic: holding the wall button overrides the photo-eyes. If the door closes that way but not from the remote, the sensor circuit is the problem — alignment, wiring chewed by a mouse, or a failed sensor. Sensor replacement runs $75–$175 professionally.

4. Travel limit set wrong

If the door goes nearly to the floor and then reverses without the light-flash sensor signature, the opener may think it hit an obstruction because its “close limit” is set short, or the close force is set too sensitive. On most openers these are dials or menu settings on the head unit. Adjusting is owner-doable per your manual, but small increments only — the force setting is a safety system.

5. Something actually in the track

Inspect both tracks full-height. A stone, a pressed-in dent, or a hinge screw lying in the track stops the door cold. Dented track sections can sometimes be carefully reformed, but significant track damage is a pro repair ($125–$300) — never unbolt a track yourself; they brace the whole system.

6. Broken spring or cable — stop here

If the door starts down and then slams, sits crooked, or the opener strains and gives up, look up: a torsion spring with a visible gap in the coil, or a cable hanging loose, means the door’s counterbalance is gone. Stop using the opener immediately — driving a door with a dead spring strips the opener’s gear and can bend the top panel. This is a same-day professional repair ($150–$450 depending on the failure).

7. Cold-weather stiffness

In winter metros, grease thickens, rollers stiffen, and the extra drag can trigger the opener’s force protection mid-travel. If the door balks only on cold mornings, a tune-up with cold-rated lubricant usually cures it — and if your door is frozen to the slab, don’t let the opener fight the ice; free it manually first.

When to call

Sensors, alignment, and limits are fair DIY territory. Springs, cables, bent tracks, and anything involving the door’s tension system are not — that hardware is under load that injures people who watch one video and feel confident. A pro visit for a “won’t close” diagnosis typically runs $75–$150 and is often same-day.

Stuck right now with a door that won’t secure your home? That’s an emergency call — we’ll connect you with a local pro 24/7.