You may find something blocking the light that passes between them or you may find that cleaning the lenses solves the problem.
Problems liftmaster garage door closing.
The garage door opener will not close and the light bulbs flash.
To fix this issue and get your liftmaster garage door opener working again follow these troubleshooting steps.
Safety sensors are not installed connected or wires may be cut.
Problems with the safety sensors when the door won t close or it closes only part way and immediately opens again the safety sensors are the first thing to check.
There is a short or reversed wire for the safety sensors.
Sometimes it would close part way before stopping and reversing and other times it wouldn t open at all.
Another clue to the mystery was if you held the wall switch the door would completely close.
To interact with this component access the preview mode.
Pull the emergency release handle down and back towards the garage door opener.
Whether you have a belt drive chain drive or wall mount model find helpful resources manuals videos and more to help you diagnose and fix the problem.
This will disconnect the garage door opener from the door.
The garage door opener will not close and the light bulbs flash.
The door would always open fine but then would have trouble closing.
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