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.
My garage door closes then reopens.
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.
Your garage door is programmed to travel a certain distance before it closes.
This is almost always the result of a dirty or obstructed safety feature.
An exposed spot or a short circuit in the small gauge wire that leads from the garage.
What to do when your garage door opens and closes by itself check with your neighbors.
If the garage door does not close completely or begins to close and then opens back up again the down limit switch needs.
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.
This is done with the help of sensors in the motor and on each side of the opening near the floor and mounted on the tracks.
You push the button to close the garage door.
Close the garage door with the opener and watch it closely as it closes.
It goes partway down reverses direction and goes back up again.
In garage door operators made after 1993 there are required safety features that open the door during the close cycle when they detect something blocking the door.
In rare instances a nearby neighbor may have a garage door opener set to the same wireless.