Adjust the springs on both sides of the door the same way.
How to tighten overhead garage door springs.
How to safely adjust your garage door spring.
The torsion spring helps the garage door open and close easily.
If the door was closing too quickly move the spring to the next higher hole on the bracket.
This can make the other parts of the garage door last a much longer time.
Once the spring is free of tension remove from its track hanger.
There are two torsion springs at each side of the garage door.
The springs are located at the top inside part of the garage door.
If it was opening too quickly move it to the next lower hole.
Once your garage door is secured remove the spring hook from the track hanger which will allow you to move the hook and adjust the spring s tension.