Signs of a Faulty Garage Door Sensor

You have to know how to spot the signs of a faulty sensor in your garage door if your garage door is not properly closing.  

It isn’t always clear if the sensor of your garage door is malfunctioning. However, there are several common indications that show it is failing.  

Having a garage door that isn’t properly closing is one of the most common indications. If you notice this issue, the path of the sensor is the first aspect you’ve got to examine. The reason for this is that any items obstructing the path will stop the garage door from closing. It is a feature in your garage door that avoids damage to personal items and injury. Other indications include flashing sensor lights, a sensor light that is missing, and flashing garage door opener lights.  

Here are a couple of things you should check to tell if you need a door sensor repair service: 

Wear and Tear 

The issue can often be due to regular wear and tear. This is particularly true if you have been utilizing the same sensor for more than a decade.  


You’ve got to ensure both sensors line up with one another. They won’t properly work if both the sensors aren’t aligned. Examine if this is the cause by looking at the LED lights on both the sensors. You have to see green lights if this isn’t the cause. You should check for the alignment if you see red lights flashing or you don’t see lights at all. 


If the sensor is wet, you should dry them. Wetness around and in the sensors is often a potential cause of the malfunction. This usually happens if the sensors were exposed to water from the sprinkler system or from the rain. 

Sensor Lenses 

Offer sensor lenses an excellent cleaning. Door sensor lenses are often covered in debris. This occurs if you do not clean them frequently or if you live close to an intersection. All these debris can accumulate on the lenses and it is probably blocking the sensor. Thus, it won’t properly function. 


One common cause of a failing garage door sensor is the lack of power supply. Thus, you’ve got to reconnect the sensor to a power supply if necessary. Search for tiny LED lights on the sensor. There is no problem with the power supply if both of the LED lights in the sensors are turned on. On the other hand, it shows that there is an issue in the power supply if you find the lights turned off in one or both the sensors.  


You’ve got to ensure nothing is blocking the beam of the sensor. Generally, garage door sensors stop the door from closing if there’s something blocking its path. This safety measure guarantees that the door does not close whenever your vehicle is in the doorway. This same process will also operate if other objects are placed near the door as well. Because of this, you have to ensure that there aren’t any items that are blocking the path of the garage door sensor. 

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