Try opening the garage door with the remote and see what happens.
Garage door closes a little then opens again.
This will cause the trolley to move into position and reconnect to the garage door.
This brain can wear out in time so you could need a replacement.
Measure the distance of the gap from the bottom of the.
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.
Your garage door s logic board is the brain of your garage door opener.
To reconnect the garage door to your liftmaster garage door opener manually close the garage door pull the emergency release handle down.
These steps should fix.
When the logic board wears out it can cause your garage door to close then open and vice versa without explanation.
It goes partway down reverses direction and goes back up again.
Now press the remote control.
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.
If the door closes while holding the button pressed you are likely having one of the following issues with your safety sensors.
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.
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.
Get logic board replacement.
The solution is usually one or more of the following.
By wade shaddy updated december 19 2018 you push the button to close the garage door.