It s important that there s no power running to your garage door motor or you may electrocute yourself when disconnecting the door sensors.
Garage door sensor receiver no power.
Raise the garage door using the control button on the garage wall or the remote control unit from a vehicle.
You will need to check the internal components of your garage door opener.
First check for power.
Very straightforward to install.
Flip the circuit that controls the power to the garage door or disconnect the garage door plug from the wall.
I m assuming you mean safety beam sensors.
Chamberlain g801cb p safety sensor.
Inspect each sensor to make sure the green or red power indicator lights are illuminated.
Look for small led lights on the sensors.
Whether you prefer to open your garage with a personal access code or would like the convenience of a transmitter that resides on.
If they re turned on in both the sensors then there is no issue with the power supply.
Disconnect the power to the garage door.
One light should be steady green one should be steady red.
This means no matter how you connect them they will work.
If the red light is flashing then there is an obstruction in the way or the beams are misaligned.
A common cause of a malfunctioning garage door sensor is lack of power supply.
This is also a non polarized garage door opener safety sensor.