Loosen the small nuts that hold each sensor to the l brackets with a small adjustable wrench.
One garage door sensor not working.
Troubleshooting check if there are any objects impeding the door.
If the sensors are working the garage door should immediately stop closing and return to the open position.
Press the button that closes the garage door on the garage wall or on your remote.
Replacing your old sensors.
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.
Now that you have made sure there are no obstructions and that both sensors are aligned properly.
Cleaning and adjustment remove any debris dust or cobwebs from the electric eye lenses on each sensor with a clean rag.
Cycle the garage door.
Strip both ends of wires from each sensor and twist like colored wires together.
Follow these easy steps there isn t a solid light coming from the safety eye sensors.
Sweep the garage floors and look through the sidings to ensure that.
Remove the wires from the wire nuts or cut the sensor wires 12 from the sensors.
Adjust each sensor in small.
Loosen the nuts just.
Liftmaster suggests them be placed no higher than 6.
If you still haven t identified the problem or if you want to test the sensor wires themselves remove the sensors from the brackets.