If the sensors are working the garage door should immediately stop closing and return to the open position.
One garage door sensor not working.
Remove the wires from the wire nuts or cut the sensor wires 12 from the sensors.
Loosen the nuts just.
Press the button that closes the garage door on the garage wall or on your remote.
Strip both ends of wires from each sensor and twist like colored wires together.
Cycle the garage door.
Since the lack of power supply is a common problem check the wires around the sensor when the led lights are not.
If the door doesn t open when you re standing close to the motor unit follow the troubleshooting tips in our garage door opener remotes won t work video to help you fix the problem.
Sweep the garage floors and look through the sidings to ensure that.
Replacing your old sensors.
Adjust each sensor in small.
If the garage door opener lights blink 10 times when you re trying to close the garage door then the safety sensors may need adjustment or the sensor wiring may.
Loosen the small nuts that hold each sensor to the l brackets with a small adjustable wrench.
If you still haven t identified the problem or if you want to test the sensor wires themselves remove the sensors from the brackets.
Cleaning and adjustment remove any debris dust or cobwebs from the electric eye lenses on each sensor with a clean rag.
Liftmaster suggests them be placed no higher than 6.
Even if there are no evident signs of dust on.