Safety Sensor Repair
Garage Door Sensor Repair in Las Vegas
A garage door that will not close is usually a small problem sitting in a cheap bracket. We check the alignment, the lenses and the wire run before we sell you anything, and we only replace the sensors when they are genuinely dead.
A pair of garage door safety sensors costs $145 to $195 installed in Las Vegas, parts plus labor, and a large share of the sensor calls we run need no parts at all because the fault is alignment, a dusty lens or a pinched wire. Call (702) 744-7333 and we will read the sensor lights with you on the phone, which usually names the fault before anyone drives out.
- A pair of safety sensors is $145 to $195 installed, parts plus labor. It is the cheapest line on our Las Vegas price list, and the diagnosis costs nothing if you decide not to go ahead.
- One steady light and one blinking light is the standard misalignment signal. Nudge the blinking sensor until both lights are steady and the door often closes again with no parts bought.
- If the door closes only while you hold the wall button down, it is the sensors. That hold-to-close behaviour is the opener telling you the safety circuit is open.
- Valley dust films the lenses and summer heat makes the low-voltage wire brittle where it runs along the floor track. Those two are the local failure patterns, well ahead of a genuinely dead eye.
- Sensors stop a door closing. They never stop it opening, so a door that will not lift at all is a different repair.
Overview
Garage Door Sensor Repair
The door starts down and reverses, or it only closes while you hold the wall button. That is the safety sensors, and it is the cheapest repair on our price list.
Garage door safety sensors are the two small eyes bolted near the floor at the bottom of each vertical track. One sends an invisible beam, the other receives it, and when anything breaks that beam the opener refuses to close the door. That is the whole system, which is why most sensor faults are mechanical rather than electronic: a bracket knocked by a bike, a lens filmed with dust, a wire pinched under a staple, or one eye that drifted a few degrees out of line. We work through those in order, and if a sensor is genuinely dead the pair is $145 to $195 installed on our Las Vegas price list, with the parts and the labor shown separately. If the lights are dark on both eyes, the fault is upstream and you are looking at garage door opener repair in Las Vegas instead.
Common problems we solve
- Door starts down, then reverses back up on its own
- Door closes only while you hold the wall button down
- One sensor light is blinking and the other is steady
- Both sensor lights are dark and the door will not close at all
- Opener light flashes a set number of times and nothing moves
- Sensor lens filmed with valley dust, or the low sun shining straight into it
- Sensor wire pinched, cut by a bike pedal, or pulled loose at the staple
Cost
What garage door sensor repair costs in Las Vegas
A pair of safety sensors is $145 to $195 installed, made up of $60 to $90 in parts and $85 to $105 in labor. Sensors are sold and fitted as a pair because the sending eye and the receiving eye are matched, so replacing one of them alone is rarely a real option. Every one of those numbers is a line off our published Las Vegas price list, not a figure typed for this page.
Plenty of sensor visits cost less than that, because they need no parts. An alignment, a lens clean and a wire repair are labor only, and the diagnosis is free whether or not you go ahead. We publish the range so nobody has to guess, and you get the exact flat number in writing before a wrench turns.
If the sensors turn out to be healthy and the fault is the logic board or the gear set, those are $195 to $295 and $165 to $245, and the job becomes garage door opener repair. The full opener breakdown with parts and labor split out sits on garage door opener repair cost in Las Vegas.
Diagnosis
How do I fix garage door sensors?
Most of the time you can, in about five minutes, and we would rather tell you that than drive out for it. Work through these in order and stop as soon as the door closes.
- Read the lights. Both eyes should show a steady light. On most openers the sending eye glows one colour and the receiving eye another. One steady light plus one blinking light means the beam is broken or the eyes are not pointed at each other.
- Clear the beam. A trash can, a bike wheel, a broom handle or a stack of boxes an inch into the opening is enough. So is a spider web strung between the two lenses, which we find more often than people expect.
- Wipe both lenses. A dry microfibre cloth, no solvent. Fine valley dust builds an even film that never looks dirty and still kills the beam.
- Nudge the blinking one. Loosen the wing nut, move the eye a few degrees at a time until the light goes steady, then tighten it without twisting the bracket. Aim for both eyes at the same height, square to each other.
- Follow the wire. Run a hand along the low-voltage wire from each eye up the jamb to the opener. Look for a staple driven through it, a section chewed by a rodent, or brittle cracked insulation where it has cooked against a sunlit wall.
- Check the sun. If the door fails to close only in the late afternoon, direct sun is washing out the receiving eye. A short piece of tube or a sun shield over that lens fixes it permanently.
If both lights are dark after all that, the power or the board behind them is the problem and it stops being a sensor job. If one light will not go steady no matter how you aim it, that eye is dead and wants replacing. Either way, call (702) 744-7333 and we will come out with both sensors and the common opener parts on the truck.
One thing not to do: do not tape the sensors face to face, twist the wires together, or clamp them pointing at one another to make the door close. That switches off the only thing standing between the door and whatever is under it.
Las Vegas
Why garage door sensors fail in the Las Vegas Valley
Sensors here fail on a local schedule, and it is not usually the electronics giving up. Fine valley dust is the first cause. It drifts under the door on every wind event and settles on the lenses in a flat even film that looks like nothing and stops the beam cold. A garage on an unpaved lot or a corner lot with open desert behind it gets a sensor call far sooner than one in the middle of a built-out block.
Heat is the second. Summer surface temperatures inside a west-facing Las Vegas garage cook the low-voltage wire where it is stapled along the jamb or run loose across the floor track, and the insulation goes brittle and cracks long before the eye itself fails. We see the same pattern that makes springs let go here, which we wrote up in why garage door springs break in Las Vegas.
The third is simple geometry, and it is the one with a season and a time of day attached. A great many valley garages face west, and from about October to March the late sun drops to exactly the height of a receiving eye. That one has its own answer in the next section.
We cover Las Vegas, Henderson, North Las Vegas, Summerlin, Spring Valley, Enterprise, Paradise, Centennial Hills and Green Valley for this, with Boulder City on a scheduled route.
Sunlight
Can the sun interfere with garage door sensors?
Yes, and in a west facing Las Vegas garage it is a seasonal fault with a clock attached. Direct low sun shining into the receiving eye washes out the beam exactly as an obstruction would, so the door refuses to close. The tell is the time of day: the door works all morning, fails at four or five in the afternoon, and works again the next morning. That sounds like an intermittent electrical fault and it is really a shadow problem.
It is worst from about October to March, when the late sun drops to the height of an eye bolted a few inches off the slab. A short piece of tube slipped over the lens, or a small shield above it, fixes it permanently and costs nothing. Moving the eye is the wrong answer, because both eyes have to stay square to each other.
The same season brings a different fault that gets blamed on the sensors and is not them. If the door touches the floor and comes straight back up at the same spot every time while both eye lights stay steady, the beam is fine and the opener is reading resistance from a bottom seal that has gone stiff in the cold. That one is set out in why a garage door reverses when closing.
Heat works on these eyes too, and the question people ask alongside it is whether to leave the door open on a hot day. Leave it closed. An open door turns the garage into a solar oven on the afternoon side of the house, and it is the heat inside that cooks the low voltage sensor wire where it is stapled along the jamb.
Opener
When a sensor problem turns out to be the opener
The single most useful test is the wall button. Hold it down. If the door closes while you hold it and stops the moment you let go, the opener is working and the safety circuit is open, which points at the sensors, the wire or the terminals they land on. If the door will not move at all with the button held, the sensors are not your problem.
Dark lights on both eyes mean no power reaching them, which is a wire break, a loose terminal or a failed board. A door that hums but does not move is a gear set or a carriage. A door that will not lift at all is almost never the sensors, because they only ever block a closing door, and that job is usually a broken torsion spring instead.
Sensors are the most common opener call we get and the cheapest, which is exactly why they are worth ruling in or out before anyone talks about a new opener. A whole replacement unit starts at $425 installed, and it is a poor answer to a $145 fault.
Shay Angel, owner: "Most companies hide prices. We post ours, with parts and labor shown separately, and you get the flat number in writing before I touch the door. If you decide not to go ahead, you owe nothing for the diagnosis."
What to expect
When we arrive
- We run the door once and read the two sensor lights before touching anything, because the lights name the fault faster than any meter does.
- We check alignment, clean the lenses and follow the wire run first. When that is the whole problem you are not paying for parts you did not need.
- If an eye is genuinely dead we give you the flat written price before any work starts. A pair fitted and aligned is $145 to $195.
- We finish by laying a solid object in the door's path and watching it reverse, which is the only test that proves the safety circuit works again.
Coverage
Cities we serve this in
Answers
Safety Sensor Repair FAQs
How much does it cost to have garage door sensors replaced?
A pair of safety sensors is $145 to $195 installed in Las Vegas, which is $60 to $90 in parts and $85 to $105 in labor. Many sensor calls need no parts at all, because the fault turns out to be alignment, a dusty lens or a damaged wire. You get the flat written price before any work starts, and nothing is owed for the diagnosis if you decide not to go ahead.
How can I tell if my garage door sensor is bad?
Read the two lights. Both eyes should show a steady light, and one steady plus one blinking is the standard misalignment signal rather than a dead part. A sensor is genuinely bad when its light stays dark or will not hold steady after the lens is clean, the beam is clear, the wire is sound and the eye is aimed square at its partner.
How long do garage door sensors usually last?
There is no fixed service life, and the eye itself often outlasts the opener it came with. In the Las Vegas Valley what fails first is almost always the low-voltage wire or the bracket rather than the sensor, because heat makes the insulation brittle and anything stored in the garage can knock the eye out of line.
Can you just replace garage door sensors?
Yes. They are a separate part from the opener and they bolt on with two brackets and two wires, so there is no reason to replace a working opener over a failed eye. They do go in as a pair, because the sending eye and the receiving eye are matched to each other, and a mismatched pair will not hold a steady beam.
Can I run my garage door without sensors?
No, and it is not worth it. Openers sold in the United States have been required to carry them since 1993, and bypassing them means a closing door has nothing to stop it if a child, a pet or a bumper is in the way. If the sensors are giving you trouble, aligning or replacing them is a $145 to $195 job at most, which is a great deal cheaper than the alternative.
Can the sun interfere with garage door sensors?
Yes. Direct low sun shining straight into the receiving eye washes out the beam and the opener reads that as a blocked sensor, so the door will not close. The tell is the time of day: it works all morning and fails in the late afternoon, most often from October to March in a west facing valley garage.
How do you fix a garage door sensor that is affected by sunlight?
Shade the receiving eye rather than moving it, because both eyes have to stay square to each other. A short piece of tube slipped over the lens, or a small shield fitted above it, blocks the low sun and lets the beam through, and it is a permanent fix that costs nothing.
Angels Garage Doors
Phone: (702) 744-7333
Address: 6996 Pinebrook Ct, Las Vegas, NV 89147
Hours: Open 24/7 for garage door emergencies. Regular appointments 7am to 9pm, 7 days
Website: angelsgaragedoors.services
Written by Shay Angel, owner of Angels Garage Doors, who has run the company in the Las Vegas Valley since 2015. Updated 2026-10-08.
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