Replace the opener sensors following the manufacturer.
Garage door opener sensor no light.
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.
Press the lock button to turn this feature off.
If you find the lights turned off in one or both the sensors it indicates that there is a problem in power supply.
Look for small led lights on the sensors.
The light will flash two times.
Unplug your garage door opener from the power source to prevent accidental electrocution.
There is an electrical issue in the opener.
Raise the garage door using the control button on the garage wall or the remote control unit from a vehicle.
Check the mechanism s source and sensor leds.
A common cause of a malfunctioning garage door sensor is lack of 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.
If both the red source and green sensor lights are on and not blinking then the door mechanism is working properly.
When the lock button is on the garage door opener will work from the door control but the remote controls are locked out.
The garage door sensor yellow light and the green light together create a solid illumination.
Inspect each sensor to make sure the green or red power indicator lights are.
For people who do not know the transmitter has the yellow light and the receiving sensor has the green light.
If your door control has a lock button it may have been turned on.
If one or both of the lights are off check the fuses breakers and plugs for problems.
The ceiling of the garage door.