These steps should fix.
Garage door closes a little then opens again.
If the door closes while holding the button pressed you are likely having one of the following issues with your safety sensors.
Measure the distance of the gap from the bottom of the.
Now press the remote control.
The solution is usually one or more of the following.
This will cause the trolley to move into position and reconnect to the garage door.
This is almost always the result of a dirty.
When the logic board wears out it can cause your garage door to close then open and vice versa without explanation.
If the garage door does not close completely or begins to close and then opens back up again the down limit switch needs to be adjusted.
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.
This brain can wear out in time so you could need a replacement.
It goes partway down reverses direction and goes back up again.
By wade shaddy updated december 19 2018 you push the button to close the garage door.
Get logic board 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.
Try opening the garage door with the remote and see what happens.
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.