Then lower the door about halfway.
Homemade roll up garage door opener.
The garage door opener motor is the part that activates the lifting mechanism to either raise or lower the garage door.
A properly balanced garage door is less likely to crush someone or something and keeps your door opener from working too hard.
This is generally easy to do as it goes in behind the railing system of the garage door opener.
To know how to balance a garage door first disengage the opener from the door by pulling the opener release handle see opening photo.