If the extension springs are not the same length open the garage door and change the location of one of the s hooks so that when you close the door both springs are the same length.
How to change extension springs on a garage door.
Replacing garage door extension springs is not a difficult task provided you know all the key steps.
The easiest way to do this is to take the broken spring to a local garage door dealer or home improvement center so they can help you find an exact match.
Spotting a bad garage door extension spring is easy.
You can see this when your garage door is in the closed position.
The new spring s diameter length and wire size or gauge must be the same as your old spring.
Purchase new garage door extension springs.
Be sure the door is open and supported when doing this.
Spotting and removing a bad garage door extension spring.
This video will show you how to replace the extension springs on your garage door.
If both springs are the same length the garage door should be level across the floor.
How to replace a garage door extension spring.