Unplug the garage door opener and clamp the door to the track.
How to instal a garage door spring.
On older openers you may need to remove the l shaped drawbar arm.
A pair of new springs cost about 25.
Use locking pliers or a c clamp to secure the door to the track to keep it from opening when you release the tension on the springs.
You may need to use a 2x4 or some other object to pry the garage door open.
Garage door springs come in two styles.
Disconnect the garage door opener so the door remains closed.
This can still be done when only one extension spring is broken.
Disengage the opener from the door.
There are two types of garage door springs.
Weigh your garage door.
Torsion see above which mounts on the header above the door and extension photo 1 which floats above the upper roller track.
Some garage door openers have a neutral position for the trolley disconnect.