How Do Garage Door Sensors Work & Keep You Safe

Your garage door is a costly piece of house equipment that does much more than merely seal off an entrance. You must take adequate care of it to maintain it in functioning order. Moreover, it preserves your investment since its mechanics are much more intricate than you may assume. It may require hiring a residential garage door Plano TX. The safety sensor is one of the most crucial elements of your garage door.

The sensor typically fires a beam throughout its length to identify any obstructions to the door shutting. Further, the door won’t shut if it detects any persons or items in its path. Likewise, the safety sensors stop the garage door from slamming onto your possessions, your family, or your pets, or from closing in on them.

You should see a reputable garage door repair business to make sure your garage door’s safety sensors are functioning correctly for the following reasons, among others:

Describe Garage Door Safety Sensors – Residential Garage Door Plano TX

Both sides of the garage door have little black boxes as sensors. Both sensors feature LEDs. Moreover, one has a green light to signify power. Lastly, the other has a red light that verifies the sensors can “see” each other.

What Are Garage Door Sensors?

Garage safety sensors? They convert power to infrared light to produce an undetectable tripwire. Likewise, the transmitting sensor is different from the receiving sensor. Choosing Garage door repair Frisco TX can guide you about it. Besides, the close-to-the-ground sensors can detect tiny children, dogs, tires, etc. When sensors detect an obstacle, the door reverses.

Sensor troubleshooting

  • If your garage door doesn’t close, check your safety sensors. Here are two methods to check your sensors:
  • Even if there are no barriers, the door stops and reverses.
  • Despite an obstacle, the door shuts completely.
  • Dirty lenses, misalignment, and pinched wires cause garage door sensor failure. We’ll discuss how to fix each one below.

Lenses Dirty

The safety sensor’s photo eye is glass, like a camera lens. Furthermore, it is small and quickly soiled. Use a gentle cloth and streak-free cleaner to clean. Lastly, cleaning the photo eye might solve sensor issues.


Low-mounted sensors are easily misaligned. Blinking sensors indicate misalignment. Therefore, use a screwdriver to tighten or bend the bracket. Consequently, when photo eyes are adjusted, the blinking stops.

Wires Pinched

Pinched sensor wires might cause uneven performance. You’ll need to replace the whole system then choose residential garage door Plano TX. To prevent harm or property damage, deactivate your electric opener.

Safety Sensor Testing

Once you’ve repaired defective garage door sensors, test them. Using cardboard boxes higher than your sensors is the simplest. How to test garage door sensors:?

  • Close the garage door with a box between the sensors. Stop shutting down and reopening promptly. If not, continue.
  • Realign flashing sensors. See “Misalignment” for more.
  • Try again with another box. Moreover, if the sensors don’t detect the box, continue.
  • Mild cleanser and a soft towel clean picture eyes. Likewise, for more, see “Dirty Lenses.”
  • Try again with another box. Besides, if the sensors don’t detect the box, continue.
  • Check sensor wires for damage. Moisture shorted the sensors, too. Lastly, they must be replaced.

Garage Door Safety Eyes

Be brave. It’s easy to align garage door safety eyes. Try these procedures to fix your garage door. If your garage door closes then retracts, readjust the picture eyes. Before removing the photo eye, try adjusting it to determine whether the two sensors connect. If not, do this.

Most eye sensors are green. Remove the sensor. Remove the wingnut.

Point the receiving sensor in the other direction until the laser light turns off. Count to 10 when the light goes out.

Reset the sensors. Slowly align the transmitting and receiving sensors until the light returns. Reattach the safety eye.

Find Debris

Obstructions are the most frequent reason garage door sensors are triggered. Since the sensors need clear vision to communicate, even a smear might set them off. Over time, hazy lenses make it hard for sensors to communicate. Therefore, ensure the route is clear and inspect both lenses for grit, grease, or debris. Moreover, if material blocks your garage door sensors, they won’t operate.


The most sensor wire is visible. These cables aren’t dangerous, but they can come for free. Unconnected sensors won’t work. Wires may be reconnected using simple tools. Contact a pro for Garage Door Repair Frisco TX if the wiring is damaged. Here’s a DIY way to test sensor wires if you’re feeling handy.

  • We are removing sensor brackets.
  • Unwrap the wires.
  • Twist like-colored wires from the two sensors.
  • Bring the sensors to the opener motor.
  • Remove the white and gray motor terminal wire.
  • White wiring goes into the white terminal, and the stripped wire into the gray terminal.
  • Then, align the sensor eyes. If both green lights are on, replace the wiring. If the safety eye sensors don’t light up green, replace them.

If your garage door sensors still don’t function, consult a pro like Core Garage Door. They need to be replaced. Not having functional garage door sensors is unlawful, so replace them ASAP.

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