Understanding Your Garage Door’s Photo-Eye Sensor

Since 1993, all garage door systems have been required to include a crucial safety feature: the photo-eye sensor. Despite its importance, this sensor is often a common culprit behind garage door issues. Learning how the photo-eye works can help homeowners resolve minor problems without needing expert assistance. Here’s everything you need to know about this sophisticated safety system.

Primary Function of the Photo-Eye Sensor

The photo-eye sensor ensures that no object obstructs the garage door’s path. Paired with the auto-reverse mechanism, this system makes garage doors safer and more reliable. These two features work together to protect your family and property while maintaining the door’s functionality.

How the Photo-Eye Sensor Works

The photo-eye sensor operates by projecting a laser beam between two sensing eyes located on either side of the garage door. Here’s how it functions:

  • Detecting Obstructions: If the laser beam is interrupted by an object—no matter how small—the door opener detects it and reverses the door’s movement.
  • Preventing Accidents: This system is designed to keep people, pets, and objects safe from a descending garage door.
  • Potential for False Alarms: Even minor obstructions like a leaf or piece of debris can trigger the sensor, making the door inoperable.

If your door isn’t closing properly, check these common issues:

  • A misaligned sensor caused by accidental bumps.
  • Dirt or debris on the lens obstructing the beam.

Signs of a Broken Photo-Eye Sensor

Wondering if your photo-eye sensor is malfunctioning? Look for these signs:

  • Blinking Lights: A blinking light on the sensor or opener often indicates a problem.
  • Door Opens But Won’t Close: This usually signals the system has detected an obstruction.
  • Door Reverses Automatically: If the door begins to close but reverses unexpectedly, it’s a clear sign the sensor or another safety feature is triggered.

When to Call an Expert

If you’ve:

  • Cleared obstructions from the door’s path,
  • Cleaned the photo-eye lens, and
  • Ensured the sensors are aligned,

but the issue persists, it’s time to call a professional.

At A Plus Garage Doors, we have over 30 years of experience troubleshooting and repairing garage door systems. Whether it’s an emergency or routine maintenance, we’re here to ensure your door operates safely and smoothly.

Contact A Plus Garage Doors today and trust us to handle your home’s garage door needs with care and expertise.

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