The torsion spring is an essential component that will wear out at some point. The broken torsion spring can be replaced with a new one with these basic steps.
Step 1 - Act Defensively
For safety, always assume the spring is going to break and the cone is going to slip or explode as you wind and unwind the spring.
Step 2 - Cut the Power
Unplug the power cord of the opener and disengage it from the door.
Step 3 - Make Sure You Have What You Need
Gather supplies and working instruments.
Step 4 - Take Measurements
Measure old and new springs. Never touch the winding cones and don't grab the spring.
Step 5 - Make a Record
Mark torsion shaft. To level the garage door after the new springs are installed these marks will help.
Step 6 - Remove Old Spring
Unwind old spring that is not broken. Never touch a set screw without properly inserting a fitting bar into the winding cone. Loosen and remove the bolts that secure the torsion cones to the spring bracket.
Step 7 - Install New Torsion Spring
Put the new torsion spring in place. Then reinstall the torsion hardware. Wind new garage door springs.
Step 8 - Check Your Work
Check and lube the garage door. Reconnect the garage door opener.
Caution: Use stringent safety measures for garage door torsion spring repair. To avoid unnecessary risk you can always use the help of a professional. This installation process can be dangerous, so it's best to err on the side of caution.