Garage Door Spring Repair: Read the Break Before Anyone Touches the Door

Read the Break: Bang, Gap, Slack Cables

A torsion spring stores its lifting power as twist — hundreds of pounds of torque wound into a steel coil. When the steel fatigues, that energy releases in a fraction of a second, which is why a breaking spring sounds like a firecracker going off in the garage.

You can confirm the break without touching anything. With the door closed, look at the shaft mounted above the door opening:

• The gap: a healthy torsion spring is one continuous, tight coil. A broken one shows a clean separation of about two inches where the coil snapped apart.
• Slack cables: the lifting cables on each side of the door should be taut. When a spring lets go, they often droop, hang loose, or slip off their drums.
• Dead weight: a door that lifted easily yesterday and now feels like lifting furniture is telling you the springs are no longer carrying the load.

Torsion Above the Door or Extension Along the Tracks

Before you send a request, note which system you have. Torsion springs mount on a steel shaft directly above the door opening and twist to lift. Extension springs run beside the horizontal tracks on each side and stretch as the door closes. Extension systems should have a safety cable threaded through each spring so a snapped spring is caught instead of thrown. If yours has no safety cables, say so in your request — it changes what the technician brings and checks first.

Spring Life Is Counted in Cycles, Not Years

Standard garage door springs are rated for roughly 10,000 cycles, and one cycle is one full open and close. A household that uses the door four times a day burns through that rating in about seven years; a home business or busy family gets there much faster. Higher-cycle springs exist for doors that work hard. This is why springs rarely fail from one dramatic event — they fail on an ordinary morning because the cycle count simply ran out.

Why Two-Spring Doors Get Two New Springs

Heavier doors often carry two torsion springs, one on each side of the center bearing plate. The pair shares the load equally, so both springs accumulate wear at nearly the same rate. When one breaks, its twin is usually within a few hundred cycles of breaking too. Replacing both at once keeps the door balanced side to side and avoids a second failure — and a second repair visit — weeks later.

What a Technician Checks, and in What Order

Spring repair is mostly measurement. A typical assessment runs in this order:

• Confirm the break and inspect both springs, not just the one with the visible gap.
• Check the lifting cables at the drums and at the bottom brackets, since a spring break often frays or kinks them.
• Weigh or estimate the door, because replacement springs are matched by wire diameter, inside diameter, and length to that exact weight — a mismatched spring makes a door slam shut or fly open.
• Inspect the center bearing and end bearings the shaft rides on.
• After installation, run a balance test: a correctly sprung door should hold still on its own at waist height.

Repair needs vary by door and hardware, so the final scope is confirmed on site.

The Hard Safety Line

A wound torsion spring is one of the most dangerous components in a home. Unwinding one requires hardened winding bars, and improvised tools like screwdrivers can be thrown from the winding cone with force enough to cause serious injury. Do not loosen the winding-cone set screws, do not remove a bottom bracket, and do not detach a cable — all of them are under spring tension even when the door looks still. Stop running the opener, too: it is built to guide a balanced door, not drag full dead weight, and forcing it can strip the trolley carriage or burn out the motor.

What you can safely do: keep the door closed, unplug the opener, photograph the gap and cables from the floor, and note whether the door has one spring or two.

Requesting Spring Repair

Describe what you found — the bang, the gap, slack cables, one spring or two, torsion or extension — and submit a service request through the form on the contact page. Those details help match your door with a technician prepared for its exact spring system.