Place one of the cardboard boxes in the garage doorway.
Garage door sensor not working.
Press the button that closes the garage door on the garage wall or on your remote.
Press the remote control button to close the door.
Remove the wires from the wire nuts or cut the sensor wires 12 from the sensors.
If the garage sensor is working properly the door will stop closing and go back to the open position.
Sensor path make sure nothing is obstructing the sensor beam 1.
Sensor path make sure nothing is obstructing the sensor beam in general garage door sensors block the door from.
Make sure the box is also placed in front of one of the photo eyes.
Cleaning and adjustment remove any debris dust or cobwebs from the electric eye lenses on each sensor with a clean rag.
My liftmaster garage door stopped closing the normal way.
Loosen the nuts just.
Loosen the small nuts that hold each sensor to the l brackets with a small adjustable wrench.
Adjust each sensor in small.
Sensor power reconnect the sensor to its power supply a common cause of a malfunctioning garage door sensor is.
This video takes you from my problem description to a successful repair all for under 24 00 u s.
Strip both ends of wires from each sensor and twist like colored wires together.