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.
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.
Similarly if you door won t open all the way then the limit switch may be too close to the motor.
You should also find buttons or nobs that will adjust the force too.
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.
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.
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.
Release your hold on the door and see if it stays up all the way.
If your garage door is not balanced right it won t go up or down all the way.