Garage door won’t close? Safe checks for sensors, reversing and gaps
Does the door start down, then jump back up? When a garage door won’t close, the cause is often one of two small sensors near the floor. Check them first, as the steps below show, and call (254) 232-8788 if the door still will not stay down. Do not touch springs or cables, and do not force the door.
We are a call and dispatch service. You call us, and we send a technician from our partner shop. A door that is stuck open or has a car trapped is an urgent case, so see what to do right now.
Why won’t my garage door close?
The usual cause is a blocked or misaligned safety sensor. Binding, worn parts or a broken spring can also stop a door from closing. Match what you see to the table.
| What you see | Usual cause | What to do |
|---|---|---|
| Door starts down, then goes back up | A blocked or misaligned sensor beam | Clear the beam and check both sensor lights. |
| One sensor light blinks or is off | Sensors out of line, or a cut or loose sensor wire | Look at the wire. If it is damaged, stop and call. |
| Door stops near the floor and reverses | Binding, worn parts or opener settings | Do not raise the force setting. Call. |
| Opener hums, door does not move | A locked door, a stuck trolley or a broken spring | See what to check when the door will not open. |
| Loud bang, then a heavy door | A broken spring | Leave the door alone and call. |
| Door looks crooked or jams | Cable or track problem | Stop using the door and call. |
Sources: Garaga opener troubleshooting FAQ (sensor lights, wiring, binding); DASMA safety tips (springs, balance). The Garaga page is undated.
What safe checks can I do first?
Do these in order.
- Clear anything from the path of the sensor beam, such as a bag, a bike wheel or a box.
- Look at the two sensors near the floor on each side of the door. Both lights should glow steady. The Garaga guide says a blinking light means the sensor is misaligned or blocked.
- Wipe each sensor lens with a soft, dry cloth.
- Check that neither sensor was knocked. If one now points at the floor or the wall, it needs to be put back in line.
- Look at the thin wires that run from each sensor. If you see a cut, a pulled-out wire or a staple through it, stop and call.
- Try the door again. If it still reverses, stop and call.
Never remove a sensor, tape over it or move it to stop the reversing. The sensors are a safety feature, and openers have needed them since 1993. (Source: DASMA, Door and Access Systems magazine, winter 2007)
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Why does my garage door reverse after it touches the floor?
The opener thinks the door hit something. That can mean a sensor fault, binding in the track, a door that is out of balance or opener settings that have drifted. The Garaga guide lists binding and a broken spring as causes to rule out. Do not keep pressing the button. Stop and call, because the cause is often not the opener.
Can I turn up the force setting so the door closes?
No. A higher force setting can hide the real problem, and it makes the door push harder against anything in its way. The auto-reverse is a safety feature. Federal rules have required openers to reverse on contact with an obstruction since 1 January 1991. (Source: DASMA, winter 2007) If the door needs more force to close, something is binding or out of balance, and DASMA says a door that feels awkward by hand is out of balance.
Do not use hold-to-close on a door with failing sensors either. On some openers that skips the sensor, and the door can come down on a child or pet.
Why is there a gap under my garage door?
A gap under a closed door usually means the rubber bottom seal is worn, loose or missing, or the door is not coming all the way down. A worn seal lets in light, leaves, water and pests. If the gap is uneven, the door may be out of line, so call. We do not give a seal price here because we found no dated source for one.
When should I stop and call?
Call at once if any of these is true:
- You heard a bang, and the door is now heavy.
- A sensor wire is cut or pulled out.
- The door is crooked, jammed or off its track.
- The door reverses after you cleared and checked the sensors.
- The door will not stay shut and the garage is open.
How much does it cost to fix a door that will not close?
It depends on the part. Angi’s national ranges, updated 3 Aug 2026, are $150 to $250 for a sensor, $100 to $300 for a door off its track and $100 to $500 for opener repair. These are not Killeen quotes. The repair cost guide has the full table.
Do you fix a door that will not close in Killeen?
Yes. Call us, say what the door does, and hear a price range before we send anyone. We cover Killeen, Harker Heights, Nolanville, Copperas Cove and Fort Hood, and Belton at the edge of our range. See the service area. For opener faults, see opener repair. Other symptoms are on the list of common door problems.
Garage door won’t close? Call us
Call (254) 232-8788 or use the request form. Tell us what the door does, what the sensor lights show and whether you heard a bang.
Door will not stay shut?
Bell Line Garage Door, 207 E Avenue C, Killeen, TX 76541. Prices last checked 3 Oct 2026. Safety notes are general advice, not a substitute for a technician on site.