Look for a reddish cone on the torsion spring.
How to adjust tension on garage door torsion spring.
This cone has notches in it that are used to adjust the tension in the torsion spring.
The cone is on the torsion spring on the left side away from the center of the garage door.
You must release the tension on the garage door springs before attempting adjustment or replacement.
Install a vertical two by four brace at the outer edge of the door to prevent the door from falling.
Open the door fully to relieve the tension on the hinge springs at each side of the door opening.
This video applies t.
Hold the garage door in this position by attaching a c clamp to the track at a point below the lowest door roller wheel.
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.
To adjust your garage door s side mounted springs first open your door fully and secure it in place with a c clamp below the bottom roller.