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.
This is a brief demonstration on how to adjust the safety sensors on your garage door.
Sensors may fall out of alignment over time so it s important to understand how to align garage door sensors.
But if the light on the receiving sensor is blinking you may have problems with garage door sensor alignment.
Lower is easy to stand above with a foot on either side.
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.
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.