My garage door opens about six inches and stops i press the button twice so it will stop going down and then is goes up another 6 inches or so.
Garage door only goes down a few inches.
Continue to turn the down.
You push the button to close the garage door.
Try to lower the door.
Turn the down adjustment one full turn counterclockwise.
It goes partway down reverses direction and goes back up again.
This just started a couple weeks ago.
Try to operate the garage door manually this helps you determine if the problem is related to the door or the motor.
For most doors a complete rotation of the screw allows the door to advance 2 inches.
My garage door will open only a few inches and then stops.
This is almost always the result of a dirty or obstructed safety feature.