Since the sensors are often placed 6 above the ground all sorts of items could get in the way.
How to fix garage door sensor alignment.
Proper height for a garage door sensor is 4 to 6 inches 10 2 to 15 2 cm.
Garage door sensors must be aligned to ensure your garage door opens and closes properly.
In other words something is probably blocking the beam.
Sensors may fall out of alignment over time so it s important to understand how to align garage door sensors.
Lower is easy to stand above with a foot on either side.
If your garage door sensors are outside of this range remove them entirely from the garage door frame and install leveled inside the safe zone.
Garage door sensors are designed to prevent the door from closing if something obscures the sensor.