How to repair garage door springs and cables lock down the door.
How to fix a garage door extension spring.
Spray each spring with garage door lubricant.
Loosen the unbroken spring.
Clamp a locking pliers or a c clamp to the track just above one of the rollers.
Slide a grocery bag or piece of cardboard behind the spring to protect the garage door.
The stretching and contracting of the door spring on the garage door balance out the heavyweight of the garage door to help it slide up and down easily during opening and closing.
Purchase new garage door extension springs.
The new spring s diameter length and wire size or gauge must be the same as your old spring.
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.