Depending on the brand.
Garage door sensors not working properly.
Press the button that closes the garage door on the garage wall or on your remote.
Cycle the garage door.
If the sensors are working the garage door should immediately stop closing and return to the open position.
If you happen to be home when these break you ll hear a loud bang from inside your garage.
To troubleshoot your liftmaster safety sensors check if something is blocking the way of the safety sensor.
Try these two ways to fix your garage door opener sensors.
Cleaning and adjustment remove any debris dust or cobwebs from the electric eye lenses on each sensor with a clean rag.
If your garage door all of sudden won t go up and you re sure the transmitters are working properly and power is getting to the motor then you may have broken torsion springs.
Clutter or obstructions that block the sensor are the first problems to look for if your door won t close or in extreme cases open at all.
Adjust each sensor in small.
The most obvious solution to the problem may be.
Sensor path make sure nothing is obstructing the sensor beam 1.
This is most likely the reason a garage door won t close.
Sensor path make sure nothing is obstructing the sensor beam in general garage door sensors block the door from.
Loosen the nuts just.
Sensor power reconnect the sensor to its power supply a common cause of a malfunctioning garage door sensor is.
Misaligned photo eyes are another reason for malfunctioning garage door sensors.
When the safety sensor is not properly aligned or something is obstructing the light beam the garage door will fail to close.
According to liftmaster issues with the safety sensor wiring typically occur because of a poor connection incorrectly connected wires or a short in the wire from a staple.
The sensors have to be aligned with each other and also have to be connected correctly to the garage door system in order to work.
First check the sensor lights.