Garage door reverses when closing? Where it stops tells you why

A door that starts down and comes back up is reporting one of two completely different faults, and the thing that separates them is free to check: where the door stops. This is the difference between a safety eye problem and a force reading, why the second one arrives with the first cold mornings in Las Vegas every year, the test that proves which one you have, and what each of them costs from our published price list.

Where the door stops is the whole diagnosis. A door that reverses partway down, at a different point each time, with one safety eye light blinking, is the sensors. A door that touches the floor and comes straight back up, at the same spot every single time, with both sensor lights steady, is the opener reading resistance on the way down and doing what it is built to do. In Las Vegas that second case turns up every October, because the rubber seal along the bottom of the door is stiff at fifty degrees and was flat as a pancake when the opener learned where closed was in August. Call (702) 744-7333 and the diagnosis costs nothing either way.

Why does my garage door opener reverse after I close it?

Because the opener decided something was in the way. Every residential opener built since the early 1990s has two separate ways of deciding that, and they fail with completely different symptoms. The first is the pair of photo eyes bolted near the floor at the bottom of each vertical track. Break that invisible beam and the opener will not close the door at all. The second is a force reading. The motor watches how hard it is working on the way down, and if the effort goes above the number it was set to, it treats that as an obstruction and reverses, whether or not anything is actually there.

Those two faults look identical from the kitchen door and they are not the same repair. The sensor version is garage door sensor repair in Las Vegas, which is $145 to $195 for a pair installed and very often costs less because the fault is alignment or a dusty lens rather than a dead eye. The force version usually costs nothing in parts at all.

Why does my garage door bounce when I close it?

A door that touches down and bounces back up is almost never a broken part. It is the last inch of travel. The opener was taught a stopping point and a force limit, and the door now meets more resistance at that stopping point than it used to, so the motor hits the limit before it reaches the point and reverses. Three things change that resistance, and in this valley all three are seasonal in the same direction.

The first is the rubber. The strip along the bottom edge of a sectional door is a compression seal, which means it does its job by squashing. At 105 degrees it is soft and folds flat under the weight of the door with room to spare. At 50 degrees it is noticeably stiffer and gives back less, so the same travel setting now asks the motor to push through something that will not fold. The second is whatever is on the rollers and hinges, which thickens in the same week and raises drag all the way down. The third is the slab itself, which is a concrete floor that is never perfectly level and is now being met by a seal that no longer conforms to it.

None of that is a fault. It is two small changes pushing the same direction in the same week, which is what carries a door over a threshold it was sitting just inside all summer. If the seal itself is cracked, flattened permanently or missing chunks, that is a different job and it is bottom seal replacement at $95 to $145 for a 16 foot door.

The cold morning test, and what it proves

This is the one check worth doing before anybody comes out, it costs nothing, and it settles the question on its own. Close the door once first thing in the morning, while the garage is still cold, and watch where it stops. Then close it again in the warm part of the afternoon and watch again. If it refuses in the morning and closes without complaint in the afternoon, you have proved two things at once: the safety eyes are fine, because a blocked beam does not care what time it is, and nothing on the door is broken, because broken parts do not warm up and start working.

We are not the only ones who see this arrive on a calendar. Across the United States, Google Ads reports searches for garage door wont close in cold weather running at about 10 a month in September, 20 in October, 50 in November, 210 in December and 390 in January, then falling back to 10 by March. That is a thirty nine times swing between the quietest month and the busiest one, on a query that describes a mechanism rather than a part, and the curve matches the one we hear on the phone. Garage door opener force adjustment moves the same way, from about 90 a month in September and October to 110 in November and 140 in December and January. Both figures read on 8 October 2026.

How to fix auto reverse on garage door?

There is a safe half of this job and a half that is not a do it yourself project, and the line between them is clear. The safe half is everything that does not touch a setting.

1. Look at the two eyes near the floor. Both should show a steady light. If one blinks, this is a sensor problem and not the one this page is about.
2. Clear and wipe. A broom handle, a bike wheel, a bag of soil an inch into the opening, or a spider web strung between the lenses. Then wipe both lenses with a dry cloth.
3. Look along the bottom of the door. A pebble, a strip of old weather seal, a hose, or a lip of concrete that has lifted. Anything the seal has to climb over is a genuine obstruction.
4. Run the temperature test above. Morning and afternoon, same door, same remote.
5. Run a safety reverse test. Lay a flat piece of wood on the floor in the door's path and close it. The door must touch the wood and reverse. If it does not, stop using the opener and call somebody out the same day.

What is left after that is the travel limit and the down force, and those live on the opener itself. They are not complicated to turn and they are exactly the settings that decide how hard a door is allowed to push on its way down, which is why we set them with the door in front of us and finish with that reverse test every time. If you are not certain what you are changing, leave them alone. Turning force up until the door stays shut is how a safety device gets switched off by accident.

Why a LiftMaster or Chamberlain door goes back up after it closes

The same mechanism, with one brand specific tell worth knowing. On LiftMaster and Chamberlain units a reversal caused by the safety eyes is usually announced: the door reverses and the opener light flashes a set number of times, or the sensor indicator goes dark. A reversal caused by the down limit or the down force is silent. The door simply touches, comes back, and the light behaves normally. Genie units behave the same way with different labelling on the motor head.

So if your LiftMaster or Chamberlain door keeps going back up after it reaches the floor and the light is not flashing at you afterwards, the eyes are reporting themselves healthy and the opener is reporting a force reading. If the light does flash, count the flashes and start at the sensors instead, which is the checklist on what to try when a garage door will not close.

What this costs in Las Vegas

In the common case, the part cost is zero. Travel and down force are settings, not hardware, so what you are paying for is somebody with a ladder, five minutes and the reverse test at the end. That work sits inside our tune-up and 25 point safety inspection, which is $89, or $69 on your first visit, from the published Las Vegas price list. There is no charge for the diagnosis if you decide not to go ahead, and no surcharge for evenings or weekends.

If the cause turns out to be a part rather than a setting, these are the lines it usually lands on, all from the same table with the hardware and the labor split out. A pair of safety sensors is $145 to $195 installed. A 16 foot bottom seal is $95 to $145. A set of ten nylon rollers is $135 to $195, which is the fix when the drag on the way down is the rollers rather than the seal. If the opener itself is misreading, a logic board is $195 to $295 and a gear and sprocket kit is $165 to $245, and the job becomes garage door opener repair. The full opener breakdown part by part is on what opener repair costs in Las Vegas.

What page one of this question actually gives you

We read the first page of Google for garage door reverses when closing from a Las Vegas location on 8 October 2026, desktop, thirty results deep. It returned an AI Overview at the very top, a six question People Also Ask box, a carousel of videos, and eight text results underneath all of it. The AI Overview leads with the safety sensors and gives travel limits and force settings second, and its sources are a Reddit thread, a manufacturer support article and a run of YouTube videos.

Of the eight text results, one is a home warranty company, one is a national directory, one is Reddit, two are question and answer forums whose threads are dated 2006 and 2010, one is a paid answer site, and the two that belong to actual garage door companies are not in Las Vegas or anywhere near it. There is no local pack on this query and there is not one Las Vegas company anywhere on the page. More to the point, not one of those results names temperature. The whole first page treats this as a sensor problem or a generic obstruction, which is why so many people in this valley spend a Saturday cleaning two lenses that were never dirty.

Methodology: every price on this page is a line from the Angels Garage Doors price list as it reads on 8 October 2026, parts and labor shown separately there. The search volume figures are Google Ads monthly history for the United States, read through our SEO data connector on 8 October 2026. The description of page one is a single live reading taken from a Las Vegas location on 8 October 2026, desktop, thirty results deep, and search results move. The photograph is a real door from our own photo library and is not claimed as a specific dated job.