COVID-19 Statement
We are open and serving our customers as normal, however, all offices are closed to the public. We will continue monitoring the situation and take appropriate steps to safeguard our employees.
Read more on... Door and Access System Industry Deemed Essential Business.

COVID-19 Statement
We are open and serving our customers as normal, however, all offices are closed to the public. We will continue monitoring the situation and take appropriate steps to safeguard our employees.
Read more on... Door and Access System Industry Deemed Essential Business.

Mid-Atlantic Door Group Inc. Distributors of Overhead Door Corp.

My Garage Door Sensors Won’t Work: What to Do Next

Garage door sensors are a small, yet essential piece of safety equipment found on all residential garage door openers manufactured since 1993. This is in compliance with UL325 regulations.

Despite being commonplace and serving a critical role, garage door sensors often get overlooked by homeowners and property owners until something goes wrong. In this article, we offer an overview of these devices and some issues that may cause them to malfunction. We also outline ways to troubleshoot a garage door sensor that is not working.

Garage Door Sensor Issues Blog

What Do Garage Door Sensors Do?

Garage door sensors, or sometimes referred to as photo eyes, ensure that nothing is blocking the path of the garage door when it is closing. For it to continue closing, these detectors must “see each other,” which means the infra-red beam that connects the photo eyes remains unimpeded. If that ray has been interrupted, the garage door will reverse, opening instead of closing.

Common Reasons a Garage Door Sensor Stops Working

  • An object obstructs the sensor path
  • There is an issue with the sensors’ power supply
  • LED lights are not illuminating on both or one sensor
  • The sensor lenses require cleaning because of:
    • Pollution
    • Car exhaust
    • Dirt
    • Spider webs
  • Your sensors got exposed to too much moisture
  • Poor alignment of the sensors. Both sensors should have their LED lights illuminated if there’s proper alignment.
  • Your sensors experienced normal wear and tear, especially if they were installed years ago.

What to Do Next

Step 1: Check for objects blocking the photo eyes; clear them from the area.
Step 2: Check the wires around the sensor for a loose or broken connection and see if other parts of the garage are getting power.

  • If the cause is a diminished power connection, open the box and check for the electrical work, but make you exercise extra precaution by turning off the power at your breaker box.
  • If you’re unsure about the wires, call a professional repair service.

Step 3: Wipe the lenses down with a dry, clean, and soft cloth.
Step 4: Check for proper alignment and adjust as needed to make sure they are both facing each other.
Step 5: If you notice moisture on the sensor, allow it to dry and then try to open your garage door.

If these DIY troubleshooting options don’t work, consult with your garage door sensor’s owner’s manual or request a service appointment with a garage door expert. The latter will help you determine if more substantial repairs or parts replacement is necessary.

About The Author | Justin White


Justin White is the VP of Marketing for Mid-Atlantic Door Group, Inc. The company opened in 1973 and now consists of (3) official Overhead Door™ Distributors and (8) warehouse locations throughout Maryland, DC, Virginia and Pennsylvania. Justin was born into the door industry, ultimately following in his father's footsteps and joining the family owned business in 2011. After spending time in the field with fellow mechanics, Justin found his niche in marketing, along with a specialty in residential garage door sales, installation, and service.