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.
My garage door closes then reopens.
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.
An exposed spot or a short circuit in the small gauge wire that leads from the garage.
Your garage door is programmed to travel a certain distance before it closes.
Close the garage door with the opener and watch it closely as it closes.
If it closes before that distance has been traveled it thinks something is wrong and it reopens to help prevent any damage or safety risk.
In rare instances a nearby neighbor may have a garage door opener set to the same wireless.
It goes partway down reverses direction and goes back up again.
But changes in weather conditions can causes your garage door components to shift or contract.
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.
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.
Inspect the control wiring.
If the garage door does not close completely or begins to close and then opens back up again the down limit switch needs.