The limit adjusters control how far the garage door goes up and how far it goes down.
Manual garage door won t stay all the way up.
Release your hold on the door and see if it stays up all the way.
Hold the garage door and remove the vise grips from the track after the spring tension has been adjusted.
You should now be able to move the door up and down by hand.
If your garage door is not balanced right it won t go up or down all the way.
From here lift the garage door by hand about 3 feet above the ground and then release the door and see were it lands.
Locate the limit adjusters.
On the main console the box that hangs from the ceiling you ll see a few different nobs and or buttons.
Ideally the door should slowly float up from this point.
Similarly if you door won t open all the way then the limit switch may be too close to the motor.
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.
Slowly close your door about halfway and release it.
To check the balance pull the emergency release cord or chain to disconnect the door.