Garage Door Repair Realigning Sensors

Depending on the type and style of garage door, your garage door might be equipped with infrared sensors as one of the main safety devices.

The sensors will work to stop and reverse the garage door if any obstruction unexpectedly presents in the path of the closing the garage door. If there is nothing that obstructs the path of sensors but the garage door refuses to close completely, there is a possibility of problems with the safety sensors. If you don’t have enough information about sensors, it is advisable to consult a professional like, Dayton Garage Door Pros to make necessary adjustments.

How do garage door sensors work?

Since 1993, the garage door opener manufacturing industry has been using anti-entrapment safety devices in the creation of garage door opener which is typically known as “garage door sensors”. A beam of infrared light adjusted and transmitted to received signals from each other and to communicate with the opener that the path is clear and the garage door should be closed. These sensors are placed with small lights that will blink to show you that it is ON and functioning. Realigning the garage door sensors is a matter of making both of the lights blinking simultaneously and continuously. 

Things went wrong suddenly?

Garage door sensors have nothing to do with opening operations of the garage doors. They only concern with the closing operations. If your garage door refuses to open, you may need to consult an experienced garage door specialist in order to diagnose the actual problem. Garage door sensors may lose their power supply or got out of alignment due to several problems. If there is something that could break the beam of light, the garage door will not close completely and go back. If there is any type of electrical malfunctioning, the garage door will close, even if there is something in its path.    

How to reset garage door sensors using DIY techniques:

If you have tried but failed in realigning the sensors, you may need to follow the below-mentioned instructions. First of all disconnect the power supply. You can do it from the opener system or fuse box. To realign the sensor, loosen the screw which holds the sensor in place on each side of the garage door, and then slide the sensor to its correct position which is exactly six inches above the floor and retighten the screws to secure the brackets at their own place.

To make sure that the beam of sensors is pointed at each other, you may need to use a stick to simulate the infrared beam.  Place a piece of stick from one sensor to another to balance sensors. You may use a level to do the required adjustment. Once done you should tighten the screws back into their place. Check the alignment once again and turn ON the power supply. You can test the sensors by placing a rolling ball between the sensors. If the inner LED lights do not shine, then you will have to replace the garage door sensors.


Clean the photo eye of sensors periodically to remove dirt, dust, and moisture which could cause signal breakage. If your garage door is still showing malfunctioning, there may be an electrical issue. If you have any confusion, do not hesitate to consult a professional garage door specialist.