By wade shaddy updated december 19 2018 you push the button to close the garage door.
Garage door closes a little then opens again.
Now press the remote control.
This brain can wear out in time so you could need a replacement.
This will cause the trolley to move into position and reconnect to the garage door.
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.
It goes partway down reverses direction and goes back up again.
Get logic board replacement.
To reconnect the garage door to your liftmaster garage door opener manually close the garage door pull the emergency release handle down.
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 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.
When the logic board wears out it can cause your garage door to close then open and vice versa without explanation.
These steps should fix.
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.
This is almost always the result of a dirty.
Try opening the garage door with the remote and see what happens.
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.
Measure the distance of the gap from the bottom of the.