What to Do When a Garage Door Spring Breaks

It usually happens without warning: a loud bang from the garage, and suddenly the door is either stuck shut or impossibly heavy to lift. Here's exactly what's going on, what to do in the moment, and why this is one repair worth leaving to a professional.

What That Loud Bang Actually Was

Torsion springs are wound tightly under significant tension to counterbalance the door's weight. When one fails, that stored energy releases suddenly — which is exactly the loud bang homeowners describe, often mistaken for something falling or even a break-in. It's startling, but it's a mechanical failure, not a structural one to your home.

Immediate Steps to Take

In the moments right after a spring breaks:

• Do not try to open or close the door manually or with the opener.
• Keep children and pets away from the door and track area.
• If a vehicle is trapped, it will need to stay put until the spring is replaced.
• Note whether the door has one spring or two — this affects the repair.

Why This Isn't a DIY Repair

Even homeowners comfortable with general repairs should avoid replacing a torsion spring themselves. The winding bars and technique required to safely wind a new spring under tension are specialized, and mistakes can cause the spring to release violently. This is genuinely one of the more dangerous DIY repairs in home maintenance — the risk isn't worth the cost savings.

What a Professional Replacement Involves

A technician identifies the spring type and size needed for your specific door, safely removes the broken spring, installs a matched replacement, and tests the door's balance before finishing. If your door has two springs, the second is usually inspected and often replaced at the same time, since it has typically undergone similar wear.

Could This Have Been Prevented?

Springs have a rated cycle life, and Phoenix's heat can accelerate wear. Routine lubrication and an annual balance check can catch a weakening spring before it fails suddenly — but even well-maintained springs eventually reach the end of their service life. A sudden break isn't necessarily a sign of neglect.