How to replace a garage door extension spring step 1.
Replacing a garage door extension spring.
At the far end of the door rail.
Disengage the opener from the door.
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.
Some garage door openers have a neutral position for the trolley disconnect.
Get it right the first time.
If you have an older opener you may need to remove a fuse or flip.
Purchase new garage door extension springs.
With a second set of hands to help you along manually lift the door off the ground and lock.
The following steps will walk you through how to replace an extension garage door spring.
Disengage the broken extension spring one end at a time.
Replacing garage door extension spring safety cable.
Unplug the power cord to your garage door opener.