You ll need to first equip yourself with a wrench of some sort and a tape measure.
One garage door sensor light is yellow.
Look for small led lights on the sensors.
Garage door sensor light is yellow not letting door shut.
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.
Another possible problem could be the sun.
If you own a garage door opener by lift master chamberlain or craftsman you ll notice that the sender sensor will usually shine a yellow light and the receiver sensor will usually shine a green light.
Door will close to about 1 foot remaining and then reverse as liftmaster sending sensor is yellow and receiver light is green.
If you see that the sender sensor is not yellow and the receiver sensor is not green then this means that your sensors are probably off.
When depressing the garage door opener the door starts to.
Front of the sensor.
Garage door sensor light is yellow not letting door shut.
So how do you fix this issue.
If the sun shines on the sensors it may hit it in such a way as to block the light.
A simple fix would be to block out the sun by fixing a piece of cardboard in.
If you find the lights turned off in one or both the sensors it indicates that there is a problem in power supply.
I reprogrammed my genie opener after that was done the door i reprogrammed my genie opener after that was done the door will only go down by holding the wall button down until the door is completely down.
Liftmaster sending sensor is yellow and receiver light is.
The garage door sensor yellow light and the green light together create a solid illumination.