This is almost always the result of a dirty.
Garage door falls back down.
When the door opens it sometimes falls back down part way.
It can also be due to to cables that are broken.
It hits top then bounces back down rather than stopping in fully open position.
I have had it serviced twice spring tension and limits adjusted by local overhead dealer but problem persists.
By wade shaddy updated december 19 2018 you push the button to close the garage door.
It goes partway down reverses direction and goes back up again.
If the garage door suddenly comes crashing down and will not go back up this is usually the result of a snapped cable.
Some models have two screws labeled.
Also it could be due to springs and cables that have been poorly installed or a damaged garage door track.
Locate the limit switch adjustment either on the back of the opener or behind the light bulb s lens cover.
The garage door can fall too quickly as a result of springs that have become too loose.
Snapped cables should be professionally replaced before you try to use the door again.
Set a safety ladder under the garage door opener.
Typically this happens because of springs that have become too loose or cables that are broken.
If your garage door falls too fast when you decide to close it then the problem may be one of these.