If your garage door is not balanced right it won t go up or down all the way.
Manual garage door won t stay all the way up.
From here lift the garage door by hand about 3 feet above the ground and then release the door and see were it lands.
Release your hold on the door and see if it stays up all the way.
As the garage door motor lifts the door it pushes against the limit switch in blue in the diagram causing the motor to cut out at the correct height.
You should now be able to move the door up and down by hand.
Ideally the door should slowly float up from this point.
Slowly close your door about halfway and release it.
To check the balance pull the emergency release cord or chain to disconnect the door.
Hold the garage door and remove the vise grips from the track after the spring tension has been adjusted.
Start by making sure your garage door is open all the way.
The limit adjusters control how far the garage door goes up and how far it goes down.
Move the limit switch to try and solve this issue.
Similarly if you door won t open all the way then the limit switch may be too close to the motor.