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