Garage Door Won't Close: What to Do Right Now
A door that starts to close then reverses, or won't respond to the close command at all, is usually the safety sensors doing their job — they refuse to close on anything that might be in the way.
The checks below are safe and take a couple of minutes. Most no-close problems trace to the two little photo-eye sensors near the floor.
If this is unsafe or getting worse right now, don't wait — call and we'll route you straight to an independent local pro.
What to do in the first 5 minutes
- Look at the two safety sensors near the floor on each side of the door — one should show a steady light. A blinking or dark light means they're misaligned or blocked.
- Clear the sensor path: sweep away leaves, cobwebs, or anything sitting in the beam, and wipe each lens gently.
- Nudge a sensor bracket so both eyes point straight at each other; when aligned, the indicator light usually turns solid.
- Check the track for an obvious obstruction, a stray object, or a bent section stopping the door.
- As a diagnostic clue only, note whether holding the wall button forces the door down — if it does, the problem is almost certainly the sensors, not the door itself.
Do not do this
- Never permanently bypass or disable the safety sensors — they exist to stop the door closing on a child, pet, or car.
- Don't use the hold-to-close button as a fix; it's only a clue that the sensors are the issue.
- Never put your hand or foot under a moving door to test the auto-reverse.
- Never adjust the springs, cables, or door-force settings yourself to force a close.
What's likely going on
Misaligned or dirty safety sensors (most common)
The two photo-eyes must see each other. A bump, a spider web, or sun glare breaks the beam and the opener refuses to close. Realigning or cleaning them fixes most no-close calls.
Obstruction in the track or path
A stored item, a bike, or debris in the beam or track will stop the door. Clearing it often solves the problem instantly.
Damaged sensor wiring
Chewed or pinched sensor wires cause intermittent no-close behavior that cleaning won't fix. A tech can trace and replace the run.
Opener limit or force settings
If the opener's travel limits are off, it may think the door is already closed or apply too little force. Adjusting these is a job for a tech, not a homeowner.
Diagnose it now
What it typically costs
Sensor realignment is often just a service-call fee, and sensor or wiring replacement typically falls in the $150–$400 opener-repair range. After-hours visits can add $50–$150. A tech confirms whether it's a five-minute alignment or a wiring repair.
Frequently Asked Questions
Why does my garage door go back up when I try to close it?
A door that reverses is almost always the safety sensors detecting a broken or misaligned beam. Clean both lenses and align them so each shows a steady light. If it still reverses, the wiring or opener settings may need a tech.
Where are the garage door safety sensors?
They're the two small units mounted a few inches off the floor on each side of the door, wired back to the opener. One is usually a sending eye and the other a receiver; they must point directly at each other.
Is it safe to hold the button to force the door closed?
Only as a one-time diagnostic to confirm the sensors are the issue — and only when you can see the door path is completely clear. It's not a fix. Leaving the sensors bypassed removes the safety feature that stops the door on people or pets.
The service that handles this
Guidance only — independent local providers assess and price their own work. Last reviewed 2026-07.
Prefer to just talk to someone?
Call or send the short form — we'll route you to an independent local pro.