Door Problems
Garage Door Won’t Close? Start With the Sensors
A door that reverses or refuses to come down is the most common call we get, and most of the time the fix is simple. Here is what to check, in order.
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Why Garage Doors Refuse to Close
Every automatic opener sold in the US since the 1990s has to reverse when something is in the way. That rule exists because doors used to injure kids and pets. The parts that do the job are the two safety sensors near the floor and the force setting in the opener. When either one thinks something is wrong, the door goes back up.
So a door that will not close is usually a door that is doing its job a little too well. The trick is finding out what it thinks it sees.
| What happens | Likely cause | Safe to check? |
|---|---|---|
| Door starts down, then goes right back up | Safety sensors blocked, dirty or misaligned | Yes |
| Opener light blinks and door will not move down | Sensor fault or loose sensor wire | Yes |
| Door closes, touches the floor, then reverses | Close limit or force set wrong | Partly |
| Door stops partway down and reverses | Something in the track, bent track, binding roller | Partly |
| Door will not move down at all from the remote | Lock mode, remote problem | Yes |
| Door drops fast or crooked when closing | Broken spring or cable | No, call |
Step 1: Check the Safety Sensors
Look at the two small boxes mounted a few inches above the floor on each side of the door opening. One sends an invisible beam, the other receives it. Each has a small light. On most openers both should glow steady. A blinking or dark light means the beam is not getting through.
- Clear anything between them: a bin, a bike, a box, leaves or spider webs.
- Wipe both lenses with a soft cloth.
- Check that the brackets have not been bumped. They should point straight at each other at the same height.
- Look for loose or chewed wires running from the sensors up to the opener.
- If the problem only happens in the late afternoon, the sun may be shining straight into the receiving sensor. Swapping the sides of the sensors or adding a small shade usually fixes it.
Step 2: The Hold Down Test
On many openers, if you press and hold the wall button the whole way down, the door will close even with a sensor problem. Watch the door the entire time and let go if anything is in the way. If it closes this way, you know the sensors are the issue, not the door or the opener motor.
This is a short term workaround to secure the house, not a fix. Get the sensors sorted so the reversing safety works again.
Step 3: Limits and Force
If the door reaches the floor and then pops back up, the close limit is set too far or the force is set too low. Heat, a new weatherseal or a settled slab can change where the door meets the floor. Limits and force are set in the opener and the exact steps depend on the model.
After any adjustment the door must pass a reversal test: put a 2×4 flat on the floor under the door and close it. The door must reverse when it touches the board. If it does not, the force is set too high and the door is unsafe. Our opener repair visits always end with this test.
Step 4: Tracks and Rollers
If the door stops partway down, look along both tracks. A dented track, a loose bracket or a roller that has lost its bearings can make the door bind, and the opener reverses when it feels the resistance. Hail dents near the bottom panel and car bumps on the track are common causes here.
Do not hammer a track back into place with the door in it. A door that has come out of the track is covered on our off track door repair page.
Stop and call if: the door drops fast, hangs crooked, a cable is loose, or you heard a bang. Those are spring or cable problems and the door can fall.
Leaving a Door Open Overnight
In Killeen a garage left open overnight is an open invitation, and on post move outs it often holds everything you own. If you cannot get the door closed, call us. We run 24/7 with different shifts, so someone picks up at night.
If you have to leave it until morning, unplug the opener, close the door by hand if the springs are intact, and use the manual slide lock if your door has one.
Won’t Close FAQ
Still not sure what your door needs? Call and describe it. We can often tell you on the phone whether it’s the spring, the cable or the opener.
Why does my garage door go back up when I try to close it?
Usually the safety sensors. If the beam between them is blocked or the sensors are out of line, the opener reverses the door. Clear the area, clean the lenses and line them up so both lights are steady.
Can sunlight really stop a garage door from closing?
Yes. Low sun shining straight into the receiving sensor can wash out the beam. It shows up on west or east facing garages at certain times of day. Swapping sensor sides or adding a small shade fixes it.
Is it safe to bypass the garage door sensors?
No. The sensors are what stop the door from closing on a person, pet or car. Holding the wall button to close the door once is fine while you watch it, but the sensors should be fixed, not removed.
Why does my door close and then reverse when it hits the floor?
The close limit or force setting is off. The opener thinks it hit something. Adjusting limits is model specific and must be followed by a reversal test with a 2×4.
Can you come tonight if my door will not close?
Yes. Call (254) 325-2800. The shop is open 24/7.
A Gap Under the Closed Door
If the door does close but leaves a gap, it is usually the bottom seal, an uneven slab or a crooked door, not the opener. Do not raise the close force to fix it. See weather stripping.
Related Repairs and Guides
Opener Repair and Installation
Chain, belt and wall mount openers, sensors and remotes.
Door Stuck Open? Call Any Time
Call any time, day or night. Tell us what your door is doing and we’ll tell you what it likely needs and what it should cost.
📍 202 N Gray, Killeen, TX 76541 · 🕒 Open 24/7 · 📞 (254) 325-2800