If both springs are old you should replace them both at the same time.
How to change a garage door extension spring.
Place scale under the garage door on the side of the door with the broken extension spring.
Purchase new garage door extension springs.
Do not use a digital scale as they often will not respond to the door weight changing as rollers no longer stick to the track.
Once in place disconnect the.
Disengage the broken extension spring one end at a time.
You may need to use a 2x4 or some other object to pry the garage door open.
At the far end of the door rail remove the spring end from its mounting pin.
This video will show you how to replace the extension springs on your garage door.
The following steps will walk you through how to replace an extension garage door spring.
Detach the cable and thread it around the pulley to free the spring.