It goes partway down reverses direction and goes back up again.
Garage door opener starts to open push button again.
Check to make sure the pulley is not boken.
Opener runs but the garage door does not move screw drive models make sure the carriage is engaged.
Replace broken chain belts sprockets or pulleys.
This is almost always the result of a dirty.
If the remote were to malfunction due to a backward battery installation you might mistake this for a more serious problem with your garage door opener.
Try resetting the remote.
Garage door reversing before closing garage door openers manufactured after 1993 include sensors to prevent a door from closing on a child or pet.
By wade shaddy updated december 19 2018 you push the button to close the garage door.
Check to make sure the chain belt assembly is not broken or off its pulley.
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.
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.
Broken garage door torsion or extension springs.
If not re engage it.