If it closes only partway the safety sensors are usually responsible clean the lenses or realign them and make sure there are no obstacles blocking the beam.
Garage door closes a little then opens again.
If you re craftsman chamberlain etc garage door opener is closing and then opening up its likely a common problem related to the stop limit mechanism.
By wade shaddy updated december 19 2018 you push the button to close the garage door.
Your garage door s logic board is the brain of your garage door opener.
Now press the remote control.
This will cause the trolley to move into position and reconnect to the garage door.
If your garage door won t open or close the problem could be a bent track a broken torsion spring or a bad capacitor int he motor housing.
If your garage door is closing fully and then reversing to open again then it may be due to a problem with the close limit switch.
If the door closes while holding the button pressed you are likely having one of the following issues with your safety sensors.
When the logic board wears out it can cause your garage door to close then open and vice versa without explanation.
The solution is usually one or more of the following.
Get logic board replacement.
It goes partway down reverses direction and goes back up again.
These steps should fix.
Try opening the garage door with the remote and see what happens.
This brain can wear out in time so you could need a replacement.
In order to fix this you ll want to make small changes to the close limit setting until the door opener knows to stop once the door has reached the floor.
To reconnect the garage door to your liftmaster garage door opener manually close the garage door pull the emergency release handle down.