Sensors may fall out of alignment over time so it s important to understand how to align garage door sensors.
How to fix garage door sensor alignment.
Higher than that can miss many low lying objects including pets.
In other words something is probably blocking the beam.
Garage door sensors are designed to prevent the door from closing if something obscures the sensor.
But if the light on the receiving sensor is blinking you may have problems with garage door sensor alignment.
Garage door sensors must be aligned to ensure your garage door opens and closes properly.
Proper height for a garage door sensor is 4 to 6 inches 10 2 to 15 2 cm.
Lower is easy to stand above with a foot on either side.