How To Change A Garage Door Extension Spring

Open the garage door to remove all spring tension and clamp it in place.

How to change a garage door extension spring. This video will show you how to replace the extension springs on your garage door. Place scale under the garage door on the side of the door with the broken extension spring. At the far end of the door rail remove the spring end from its mounting pin. Disengage the broken extension spring one end at a time.

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. Detach the cable and thread it around the pulley to free the spring. Purchase new garage door extension springs. The following steps will walk you through how to replace an extension garage door spring.

If both springs are old you should replace them both at the same time. You may need to use a 2x4 or some other object to pry the garage door open.