The truth about garage door spring danger, why DIY replacement injures hundreds of people each year, and when to call a pro. Call 423-583-9355 anytime.
The short answer: yes—and people die every year A typical residential torsion spring holds 200–400 pounds of stored energy. Wound onto a 1" shaft, that energy releases instantly if a winding bar slips. People have lost fingers, teeth, eyes, and lives attempting DIY replacements.
Why pros don't get hurt Calibrated winding bars sized to the cone, two-person tension checks on heavy doors, IPPT calculations matched to door weight, eye protection, and a thousand reps of muscle memory. There's no YouTube shortcut for that.
What springs can do if they fail in use A snapping torsion spring stays on the shaft and is mostly contained. An extension spring without a safety cable can launch across the garage at 60+ mph and through drywall on the other side. We never install extension springs without safety cables, ever.
Bottom line Spring replacement is the one garage door repair you should never DIY. The savings ($150 in parts) isn't worth the risk.
Related - [Torsion vs extension springs](/torsion-vs-extension-springs-chattanooga) - [Spring replacement Chattanooga](/garage-door-spring-replacement-chattanooga)
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