Garage door safety sensor on wooden door

Garage Door Sensors

Ensure your garage door operates smoothly & safely

Behind the simple push of a button to open your garage door lies a complex system of sensors, safety features, pressure monitoring, and CO₂ sensors that ensure safe and efficient operation. At Dynamic Garage Doors, we specialize in diagnosing and repairing issues such as misaligned safety sensors, faulty pressure sensitivity, connectivity problems with monitoring sensors, and degraded CO₂ detectors. Whether it’s recalibrating sensors, replacing faulty parts, or restoring smart system connections, our expert technicians ensure your garage door operates smoothly, safely, and intelligently every time.

Garage gate sensor mounted on wall. Close up of photoelectric sensor with connected to overhead sectional door.

History of Garage Door Sensors

Garage doors have become a primary entry point for many homes, making their safety features more important than ever. Garage door sensors, commonly referred to as photo-eyes, utilize infrared beams to detect obstructions. One sensor emits the beam while the other receives it, creating a safety mechanism that prevents the door from closing if the beam is interrupted.

In response to safety concerns, the Consumer Product Safety Improvement Act of 1990 mandated that all automatic residential garage door openers manufactured after January 1, 2003, include these electric eye sensors. These sensors either detect objects in the door’s path or require a person to press and hold a wall-mounted control button to close the door.

Types of Garage Door Sensors

Garage door sensors are vital components of modern garage systems, enhancing safety, improving functionality, and ensuring smooth operation. Typically installed about six inches above the ground, these sensors detect small children, pets, or objects that might otherwise go unnoticed. This critical safety feature dramatically reduces the risk of accidents, making garage doors much safer for households. Working in conjunction with the garage door opener, the sensors detect obstacles, monitor movement, and help prevent accidents or damage. Understanding the various types of sensors can help homeowners select the most suitable system for their specific needs. The four most common types of garage door sensors are:

  1. Safety Sensors

Mounted on either side of the door, safety sensors prevent the garage door from closing if something obstructs the infrared beam. These are the most widely used sensors and became mandatory after several fatal accidents involving children. They provide peace of mind by ensuring the door only closes when the path is clear.

  1. Pressure Sensors

Installed along the bottom edge of the door, pressure sensors detect physical resistance during closure. Even minimal pressure will cause the door to stop and reverse. This feature adds another layer of protection in case the photo-eyes fail to detect an object.

  1. Monitor Sensors

Monitor sensors are ideal for homes with multiple garage doors. These smart sensors connect with mobile apps, allowing users to remotely monitor, schedule, or control garage doors. They’re often integrated into home security systems, offering enhanced convenience and security.

  1. CO₂ Sensors

Though not standard, CO₂ sensors are used in garages to monitor carbon dioxide levels. These are especially useful in homes with attached garages to prevent harmful gas buildup, helping protect your family from invisible dangers.

Person pushing button on garage door opener remote
Close up of a garage door photo eye sensor

Common Garage Door Sensor Issues and Fixes

Garage door sensors are essential for ensuring the safety of your garage door system and are generally easy to maintain. Most systems include two lights: a red light (the transmitter) and a green light (the receiver). When these sensors stop working correctly, it’s often due to one of the following common issues:

Dirty Lenses

Photo-eye sensors function like small cameras. Positioned close to the ground, they are easily exposed to dust, dirt, cobwebs, or fallen leaves blocking the infrared beam. When this happens, the receiver typically blinks to indicate the presence of an obstruction. Gently clean the sensor lenses using a soft cloth and mild soap. Avoid abrasive materials scratching the surface. This quick maintenance step often restores full functionality.

Misalignment

Sensors must face each other precisely to communicate effectively. If they’re bumped by trash bins, pets, or lawn equipment, they can shift out of alignment. A blinking green light usually signals this problem. Check that both sensors are pointing directly at each other. Loosen the mounting brackets slightly, adjust the sensors to proper alignment, and retighten them. You may need to bend the brackets slightly if they’ve been knocked out of place.

Damaged or Disconnected Wiring

If neither sensor light is illuminated, it could indicate a power or wiring issue. Worn or damaged wires, whether due to weather, pests, or age, can disrupt the system, rendering the sensors non-functional. Wiring issues are more complex and usually require professional attention. In many cases, the wires or sensors will need to be replaced. Contact Dynamic Garage Doors for expert repairs with 24/7 emergency service available. Our team will get your system working safely and efficiently.

Expert Garage Door Sensor Repair

At Dynamic Garage Doors, we specialize in the installation, maintenance, and repair of garage door sensors. Whether your sensors are malfunctioning, misaligned, or simply due for a routine check, our expert technicians are just a phone call away. Garage door safety isn’t optional; it’s essential. Properly functioning sensors help prevent injuries, protect your property, and provide peace of mind every time your door opens and closes. Don’t take chances with faulty equipment. If you need fast, reliable service, day or night, contact Dynamic Garage Doors for professional support you can trust.

Scroll to Top

Emergency Service   573-644-2456