Sometimes it would close part way before stopping and reversing and other times it wouldn t open at all.
Problems liftmaster garage door closing.
Another clue to the mystery was if you held the wall switch the door would completely close.
Liftmaster garage door openers troubleshooting support.
This will disconnect the garage door opener from the door.
There is a short or reversed wire for the safety sensors.
You may find something blocking the light that passes between them or you may find that cleaning the lenses solves the problem.
To fix this issue and get your liftmaster garage door opener working again follow these troubleshooting steps.
Close the door with either the door control or the remote control.
The garage door opener will not close and the light bulbs flash.
Inspect sensor wires for a disconnected or cut wire.
To interact with this component access the preview mode.
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.
The door would always open fine but then would have trouble closing.
Pull the emergency release handle down and back towards the garage door opener.
Safety sensors are not installed connected or wires may be cut.