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.
An exposed spot or a short circuit in the small gauge wire that leads from the garage.
This is almost always the result of a dirty or obstructed safety feature.
In rare instances a nearby neighbor may have a garage door opener set to the same wireless.
Close the garage door with the opener and watch it closely as it closes.
You push the button to close the garage door.
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.
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.
If the garage door does not close completely or begins to close and then opens back up again the down limit switch needs.
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.
It goes partway down reverses direction and goes back up again.
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 is programmed to travel a certain distance before it closes.
Inspect the control wiring.