Why Your Garage Door Won't Close (and How to Fix It)

It’s a familiar scene here in Plano: you’re rushing out the door, you hit the wall button, and the garage door starts down — then stops, reverses, and rolls right back up. Or it won’t move at all, and the opener light just blinks at you like it’s trying to send Morse code.

The good news? A garage door that won’t close is usually telling you exactly what’s wrong, if you know how to listen. After 10-plus years working on doors all over Dallas-Fort Worth, we’ve found that most “won’t close” calls come down to a handful of culprits — and a couple of them you can sort out yourself in five minutes.

Here’s how to walk through it.

Start With the Safety Sensors (The #1 Culprit)

Since the early ’90s, every opener has had two small photo-eye sensors mounted near the bottom of the tracks — one on each side, usually 4 to 6 inches off the ground. They shoot an invisible beam across the opening. If anything breaks that beam, the door is designed to refuse to close so it doesn’t crush a kid, a pet, or your bumper.

The catch is that the door can’t tell the difference between a real obstruction and a sensor that’s just dirty, bumped, or knocked out of alignment. A blinking opener light is the classic sign of a sensor problem.

Walk out and check:

• Obstructions — a stray broom, a recycling bin, a leaf pile, even a spider web across the lens. Clear it.
• Dirty lenses — North Texas dust and pollen cake up fast. Wipe both eyes gently with a dry microfiber cloth.
• Alignment — bump one with a vacuum hose or a kid’s bike and it’s pointing at the wall now. Most sensors have a small green and red LED. When both eyes are aligned and clean, you’ll typically see a steady (not flickering) light. Loosen the wing nut, nudge the sensor until the light goes solid, and retighten.
• Sun glare — believe it or not, low Texas afternoon sun shining straight into a sensor can wash out the beam. If your door only acts up at certain times of day, that’s often the reason.

If you fix the sensors and the door closes, you’re done. No truck needed.

The Door Reverses Right Before It Hits the Ground

If the door closes most of the way and then bounces back up, the problem usually isn’t the sensors — it’s the close-limit and force settings on the opener.

Your opener has small adjustment screws or buttons that tell it how far to travel and how much resistance to expect. If the close-force is set too sensitive, the opener thinks it hit an obstruction when the door simply reached the floor, so it reverses as a safety measure. This drifts over time, especially after temperature swings — and DFW gives us plenty of those.

The fix is a careful adjustment of the travel and force limits, which your opener’s manual will walk you through. Go in small increments. If you crank the force too high, you defeat the very safety feature that protects your family, so this is one to take slow — or hand off to a pro if you’re unsure.

Something’s Wrong With the Door Itself

If the opener is straining, grinding, or you hear a pop and then nothing, the issue may be mechanical rather than electronic.

A Broken Spring

The springs above your door do the heavy lifting — the opener mostly just guides a balanced door. In our heat, springs fatigue faster, and most give out after about 10,000 cycles. A snapped spring often shows as a visible gap in the coil, and the door will feel impossibly heavy or refuse to move under power. Spring repair is genuinely dangerous — they’re under enormous tension — so this is not a DIY job. Here’s our garage door spring replacement page if that’s what you’re seeing.

The Door Is Off Track

If a roller has jumped the rail, the door may bind, sit crooked, or stop partway. Don’t force it with the opener — you’ll bend the track or worse. That’s a garage door off-track repair situation.

Opener Trouble

Worn gears, a bad logic board, or a dying remote can all leave you stranded. If the wall button works but remotes don’t, start with fresh batteries before assuming the worst. Beyond that, see garage door opener repair.

A Quick DIY Checklist

Before you call anyone, run through this:

• Look for a blinking opener light (points to sensors).
• Clear and wipe both photo-eye sensors, check alignment.
• Make sure the manual lock isn’t engaged and the emergency release cord wasn’t pulled.
• Check for anything blocking the tracks.
• Try the wall button — if it works but the remote doesn’t, it’s a remote issue, not the door.

When to Call a Pro

If the door is heavy, crooked, grinding, or you spot a broken spring or cable, stop and call. Those repairs involve high tension and precise balancing, and a misstep can cause real injury or turn a small fix into an expensive one.

We’re a local Plano team — background-checked techs, warranty-backed parts and labor, upfront pricing, and same-day service across DFW. No pressure and no bait-and-switch; we’ll tell you straight whether it’s a $0 sensor wipe or something that needs parts.

Want a ballpark before we head out? Run the numbers on our instant price calculator, or just call us at (214) 624-6348 and we’ll help you get that door closed today.