Nashville Garage Door Repair Co
Technician in plain workwear kneeling at the side of a residential garage door opening, adjusting a small photo-eye sensor mounted near the floor on the track bracket

Garage door sensor repair · Nashville, TN

Garage Door Sensor Repair

Door won't close, or reverses and blinks at you? We realign, clean, rewire and replace safety sensors at your home. Call, tell us what the lights are doing, and we will tell you what to expect.

CALL NOW: (615) 398-6451
  • Licensed and insured
  • Locally owned and operated
  • Upfront quote before any work begins
  • Parts-and-labor warranty

How sensors work

Why a garage door sensor stops the door from closing

Garage door sensor repair starts with understanding what the sensors do. A pair of photo-eyes sits on either side of the opening, one sending an invisible infrared beam and one receiving it. If anything breaks the beam while the door is closing, the opener stops and reverses. That safety reverse is required on every opener made since the early 1990s, and the eyes are mounted no more than 6 inches off the floor so they catch a child, a pet or a bicycle wheel.

Because the system trusts the beam, a small problem shuts the door down completely. The usual causes are a bumped bracket that points the eyes slightly off, dust or a spider web across the lens, low morning or evening sun shining into the receiving eye, and a wire that has been nicked by a lawn mower, a stapled cable or years of vibration. The opener's response is always the same: the door closes partway, goes back up, and the lights blink. Once you know that, the fix is usually quick. Sensors are a common reason an opener appears dead, so we sometimes find the opener itself is fine and opener repair is not needed at all.

Close view of a technician's hands aligning two small photo-eye sensors on brackets at the base of a garage door opening, one indicator light glowing steadily

Sensor diagnosis

What we check first on a garage door safety sensor

Indicator lights

Most sensors have a small light on each eye. A steady light on both means the beam is aligned. A dim, flickering or dark light points us to alignment, wiring or a dead eye.

Alignment and brackets

We check that the eyes face each other directly, are the same height and sit securely on their brackets. A slightly twisted bracket is one of the most common causes of the door that will not close.

Lens and sunlight

We clean the lenses and look for light hitting the receiving eye at an angle. Where sun is the problem, we shade or reposition the eye so the beam is steady.

Wiring

We trace the low-voltage wire from each eye to the opener, looking for cuts, loose terminals and pinched runs behind the track. A short or break is repaired or the run is replaced.

Replacement sensors

When an eye is dead, we replace the pair. Sensors for Genie, LiftMaster, Chamberlain and other openers are not always interchangeable, so we match the replacement to your opener, and test the safety reverse before we leave.

CALL NOW: (615) 398-6451

From call to working sensors

How a sensor repair goes

  1. 01

    You call and describe the lights

    Tell us whether the door closes partway, whether the opener lights blink, and what the sensor lights are doing. That narrows the cause before we arrive.

  2. 02

    We come out and test the beam

    Our uniformed technicians check the alignment, lenses and wiring, and test whether the opener recognizes each eye.

  3. 03

    We explain the problem and the price

    We tell you what was wrong and give you an upfront quote before any work begins.

  4. 04

    We fix it and test the safety reverse

    A realignment or cleaning is quick. Replacing a pair of sensors or running new wire is usually finished in one visit, and we confirm the door reverses on contact before we leave.

CALL NOW: (615) 398-6451

Garage door sensor repair

Door reversing for no reason, with a blinking light on the opener?

Tell us what you are seeing and we will explain what is most likely wrong.

CALL NOW: (615) 398-6451

The work

Sensor repair results

Residential garage door opening with a closed door, neat photo-eye sensors visible at the base on both sides with steady indicator lights, in daylight
A matched pair of sensors, aligned and steady.
Close-up of a single photo-eye sensor on its bracket with a clean lens and a small green light on, with tidy wiring along the track
A clean lens, a secure bracket and a tidy wire.
Technician in plain workwear testing a closing garage door by placing a board flat on the floor in its path to check that it reverses
Testing the safety reverse after the repair.

Questions

Garage door sensor questions

How can I tell if the sensors are the reason my door will not close?
If the door starts down, stops and goes back up, and the opener lights blink, the sensors are the usual cause. A dark or blinking light on one eye confirms it. If the door does not move at all, the cause may be elsewhere, and our technician will check the opener as well.
Can I close the door while the sensors are broken?
Most openers let you close the door by holding the wall button down until it finishes. That bypasses the safety reverse, so keep children and pets clear and do not leave it that way. Tell us on the phone and we will explain what to do until we arrive.
Do I need new sensors or just an adjustment?
Most of the time it is alignment, a dirty lens or a loose wire. We test before we replace anything, and we tell you which it is before any work. If an eye is dead or the wire is damaged inside the wall, replacement makes more sense.
Will a replacement sensor work with my Genie opener?
Genie and other brands each use their own sensor and wiring styles, so a replacement has to match the opener. We identify the model on the unit and fit the correct sensors, then test the system. If the opener is also failing, we will say so.
What affects the price of sensor repair?
The price depends on whether the fix is an alignment, a wiring repair or a new pair of sensors, and on the opener model. We do not guess over the phone. Our technician gives you an upfront quote before any work begins.
Is a repair covered by a warranty?
Yes. Repairs and installations are backed by a parts-and-labor warranty. We are licensed and insured, and the technician explains the problem before starting.
What should I have ready when I call?
Tell us what the door does when you press the button, what the lights on the opener and sensors are doing, and the brand of the opener if you know it. That is usually enough for us to know what to bring.

Garage door sensor repair · Nashville, TN

Door won't close and the light keeps blinking?

Leave it as it is and tell us what you see. We are a locally owned and operated team, and we will come out, test the sensors, explain the fix and quote it before we begin.

CALL NOW: (615) 398-6451