Garage Door Sensors

Garage Door Sensor Issues

Garage doors feature numerous moving parts and can be extremely heavy, with potential for causing significant damage or injury to pets, family members, and property. Due to this potential, all garage doors manufactured in the U.S. after 1993 are required to have a safety reversing system, which will detect any obstacles between the garage door and the ground, and reverse or force the garage door to stay open.

What Are Garage Door Sensors?

Modern garage doors are always equipped with a safety reverse mechanism. The most common safety reverse mechanism consists of two safety sensors.

These garage door safety sensors are typically mounted 4-6 inches from the ground along the garage door track. The sensors are connected by an invisible infrared beam and are programmed to reverse the garage door if an object, person, or animal gets between the two sensors.

Malfunctioning garage door sensors can cause the garage door to remain open or reopen immediately after closing. Most garage door sensors have a light that is programmed to blink to indicate a problem.

Keep in mind that there are several reasons your garage door could act strangely, including a worn cables, a garage door opener that needs to be repaired, and more. It’s best to call Precision Garage Door so we can inspect and diagnose your garage door problem correctly.

Garage door safety sensor

A typical garage door safety sensor that you might find in your garage.

Common Problems With Garage Door Sensors

Dirt or dust on the sensors

Misalignment due to jarring or movement during normal use

In rare cases, the lens can become damaged and need to be replaced

How to Fix Garage Door Sensors

Be sure to disconnect your garage door system from the power supply before attempting any garage door system repair or cleaning. To evaluate and repair broken garage door sensors, Precision Garage Door recommends the following steps:


Check for any obstructions in the doorway that may be interrupting the connection between the sensors.


Thoroughly clean both lenses. We recommend using a cotton swab and rubbing alcohol clean the lenses.


Inspect the wires that lead to the sensors for any damage or fraying.


Check the alignment of the sensors. You can check the alignment by tying a string between the sensors and using a level to make sure they are aligned. If adjustment is needed, tighten the brackets attached to the sensors.

Sometimes, sensors will actually malfunction due to problems with a different garage door component. If the above steps don’t solve your problem, it’s a good idea to call a professional to make sure there aren’t any major issues with your garage door system. At Precision, we work with the highest quality parts from Amarr, Clopay, Wayne Dalton, and more to get your sensor working like new as soon as possible.

People Love Our Garage Door Repair Services

Every day, we receive amazing feedback from our customers. Here are just a few stories from customers whose garage doors we repaired.

“Adam was fantastic! Very knowledgeable and thorough! Garage door is running with ease! Also.. very professional! Would recommend Precision to anyone! Great service!” – Lori N.

“Technician was friendly and very knowledgable about the service he provided. I will request the same Technician for all of my future needs should the need arise. I would recommend Precision to all of my friends.” – Michael P.

“Precision Door is prompt. They are there when they say they are going to be there or early. Fast professional service. I would give them 5 stars for our door repair. I would recommend for any garage door repair.” – Barbara M.

“Jeff was my technician, super nice and informative, he explained everything that was wrong and what needed to be done to fix it, and he was quick. I know who to call from now on with garage door issues!” – Debra V.

“Mine was a very satisfactory experience from beginning to end. The receptionist quickly scheduled a convenient time. I received a phone call from Danny when he was on the way, he rendered a prompt diagnosis and a clear description of the problem, and he carried out the repair in an expeditious manner.”
– George R.


When you schedule a service appointment with Precision Garage Door, a professional, uniformed technician will arrive at your home in a fully stocked truck. This ensures that at every appointment the necessary tools will be available. We don’t waste your time misdiagnosing the issue, waiting for parts, or arranging additional service appointments.

Serving Greenville, SC and surrounding areas, we can fix broken springs, cables, openers, and more to get your door operating safely and correctly. For more information or to schedule a service visit, please contact us today.

CALL 24/7
(864) 326-2989