Photo-Eye Safety Sensors
Garage Door Sensor Repair in Carrollton, TX
When the door starts down, the opener light blinks and the door climbs right back up, the two little eyes by the floor are the first thing we check. It is usually a same-day fix.
- Same-Day Visits
- $125–$250 Replacement
- Reversal Tested
Why the Door Keeps Reversing
Garage door sensor repair gets the two photo eyes at the bottom of your tracks seeing each other again - cleaned, re-aimed, rewired or replaced. In Carrollton a realignment usually happens inside an $89–$150 diagnosis visit, and a new pair of sensors fitted typically runs $125–$250. Sensors stop a door closing; they never stop one opening.
The eyes sit a few inches off the floor, one on each side, sending an invisible beam across the opening. Break that beam and the opener reverses. Openers made after 1993 must guard against trapping anyone under the door - that's the federal garage door opener standard - and on almost every Carrollton garage, this pair of sensors is how it does it.
So a door that refuses to close is the safety system working, just for the wrong reason. The goal of the repair is getting that beam back - never getting rid of it.
Two Lights Tell You Most of It
Check the little LED on each eye. With most LiftMaster and Chamberlain openers, a lined-up pair shows a solid amber on the sender and a solid green on the receiver. A dark or blinking green light means the receiver has lost the beam. Chamberlain's troubleshooting guide shows the same checks with pictures.
| What the door or lights do | Usual cause | Worth trying yourself? |
|---|---|---|
| Green light off or flickering | Bracket bumped by a bin, bike or mower; dirty lens | Yes - wipe it and re-aim it |
| Both lights dark | A broken wire or a staple through it | Look along the wire run |
| Only fails late on sunny afternoons | Low sun hitting the receiving eye | A sun shield fixes it |
| Closes only while you hold the button | The opener thinks something is in the way | Clean and aim first |
| Lights steady but door still reverses | Force setting or a door binding near the floor | No - that is opener or door work |
Carrollton's older neighborhoods add one more cause. On 1970s–80s garages around Belt Line Road and Old Denton Road, the original sensor wire is often decades old, stapled tight to the wall and brittle, and it cracks where it bends. A new wire run is a short, inexpensive job.
Door won't stay closed?
Describe what those two little lights are doing - that alone usually narrows it down over the phone.
What a Sensor Visit Includes
- Confirm it is the sensors. We watch the lights, break the beam, and hold the wall button to separate a sensor fault from an opener or door problem.
- Clean and re-aim. A wipe of each lens, snugged brackets, and the pair set level and square across the opening.
- Check the wiring. The wire traced back to the opener for staples, cracks, chewed spots and corroded terminals.
- Repair or replace. Fresh wire and terminals, or a replacement pair when a lens has cracked or an eye has died.
- Reversal test. A board flat on the floor, the door closed onto it, and a clean reversal before we call it done.
Sensor Repair Pricing
| Service | Typical Carrollton range |
|---|---|
| Diagnosis, cleaning and realignment | $89 – $150 |
| Sensor replacement (matched pair) | $125 – $250 |
| Sensor wiring repaired or replaced | $125 – $250 |
| Logic board, if the sensors test fine | $150 – $300 |
Flat-rate quote on-site before any part goes in. Ranges are estimates until we have seen the door and the wiring.
Want to compare this against every other job? Our Carrollton garage door repair cost guide lists every price we publish in one place.
Please Don't Bypass Them
When both lights hold steady but the door still backs up, look elsewhere - usually in the opener's force and limit settings, or worn rollers dragging the door, which our roller replacement fixes. Our guide to why a garage door won't close all the way ranks every cause by how often we find it, and our Carrollton garage door repair team handles anything else the door needs.
Sensor Repair FAQs
Why won't my garage door close all the way?
Most often the safety sensors can't see each other - check both lights, wipe the lenses and clear anything blocking them. With both lights steady, the opener's close limit or force setting is the next suspect.
What does sensor repair cost in Carrollton?
Cleaning and realignment usually falls within an $89–$150 diagnosis visit. A new matched pair of sensors or a new wire run typically runs $125–$250.
Can sunlight make garage door sensors fail?
Yes. On west-facing garages, low late-afternoon sun can shine straight into the receiving eye and drown out the beam. A small shield or swapping the eyes' sides solves it.
How high should garage door sensors be mounted?
Six inches off the floor at most, level with each other and aimed straight across, so the beam catches a toddler or a pet.
Can I replace garage door sensors with any brand?
No - sensors are made for a specific opener brand and generation. Have the model number from the motor unit handy when you call and we'll bring the right pair.
Door reversing on its own? Let's get it closing today.
Sensors cleaned, aimed, rewired or replaced, anywhere in Carrollton - with a reversal test before we leave.
Call Now - (214) 281-4871