Light doesn t activate on garage door opener when you cross safety sensor beam chamberlain group products which include the liftmaster chamberlain sears craftsman line of garage door openers have a feature where the opener light will turn on if you cross the safety sensor beam shooting across the opening of your garage door.
No sensor lights garage door.
On line manual does not specify colors.
A common cause of a malfunctioning garage door sensor is lack of power supply.
Raise the garage door using the control button on the garage wall or the remote control unit from a vehicle.
It sounds like you have a broken wire to the sensor with the green led.
The garage door sensor yellow light and the green light together create a solid illumination.
Safety sensors include two mounted sections one on each side of the garage door opening.
Inspect each sensor to make sure the green or red power indicator lights are.
Have adjusted several times.
Check if the safety reversing sensors are aligned.
The sensors use two photo eye lenses that transmit an infrared beam between them.
For people who do not know the transmitter has the yellow light and the receiving sensor has the green light.
Have no power to sensors neither sensor lights are on.
The wires from the terminal block on the opener to the door safety sensors should be connected to terminals 2 and 3 on the opener terminal block.
The lock button on the door control in on.
Depending on the brand of garage door you have one of the sensor lights may flash dim or go out completely when the beam is interrupted.
Look for small led lights on the sensors.
First check the sensor lights.
If you release button early the door reopens.
Opener works both by remote and wall button to open but will not close by remote and only if hold down wall button until door is fully closed.
If they re turned on in both the sensors then there is no issue with the power supply.
If you do not see a solid illumination or your garage door is not working the problem is most likely due to the sensors being out of line.
Unlock the lock button if your door control has a lock button it may have been turned on.