Turn the power back on and test the alignment.

How to adjust garage door sensors. Connect the new sensor to the old white wire using another blue wire nut. Tie a ribbon to one of the sensors so it’s centered on the sensor when pulled through the doorway. Garage door sensors work by shooting a beam of infrared light across your garage entrance to the sensor on the other side.

Pull this ribbon through the doorway and center it on the other sensor. Pull the string taut and tie to the. Once those are connected, move on to the white control wire.

The sensors have been exposed to direct sunlight for so long. Garage door sensors run on batteries, which is likely due to low. Repeat with the other sensor.

Close the door and then hold the button to open it. Align garage door sensors and check again to make sure the string is level. If the sensors are now aligned, you.

Loosen the bolts with a wrench or socket set, but do not remove them altogether. Find the white plastic limit switch lever. After that, you can fasten the sensors.

Place a small piece of lumber or other hard object under the door while it is open. Screwdriver string tape measure level This is located on the side of the motor unit, near.