Disengage the opener from the door.
Replacing a garage door extension spring.
How to replace a garage door extension spring step 1.
At the far end of the door rail.
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.
Some garage door openers have a neutral position for the trolley disconnect.
Unplug the power cord to your garage door opener.
Open the garage door to remove all spring tension and clamp it in place.
Disengage the broken extension spring one end at a time.
If you have an older opener you may need to remove a fuse or flip.
Once in place disconnect the.
Replacing garage door extension spring safety cable.
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.