A Broken Torsion Spring Is Not a DIY Job — Here's Why

The bang you heard was stored energy letting go

A torsion spring — the coil mounted on the bar above your garage door — is wound tight enough to counterbalance the door's full weight, often 150 to 400 pounds or more. Every time the door opens, that spring does most of the lifting; the opener mostly guides it. When the spring finally fatigues and snaps, homeowners describe the sound as a gunshot or a heavy book dropped in the garage. The coil separates, and the door instantly becomes what it actually is: a few hundred pounds of dead weight.

What makes it dangerous

To replace a torsion spring you have to wind the new one — deliberately loading it with the same energy that lifts the door — using winding bars, while standing on a ladder in front of it. If a bar slips, a set screw lets go, or the cone cracks, that energy releases in a fraction of a second. Emergency rooms see the results every year: broken hands and wrists, deep lacerations, head injuries. Extension springs (the ones stretched along the tracks on some doors) carry the same warning — a stretched extension spring that lets go whips across the garage.

There is no version of this job where the savings justify the risk. The tools are specialized, the spring has to be matched exactly to your door's weight and size — the wrong spring makes the door dangerous in a different way — and the winding itself is the hazard.

What to do when a spring breaks

• Don't try to lift the door by hand — without the spring it is far heavier than it looks, and it can drop.
• Don't run the opener — it will strain against the dead weight and can strip its drive gear or burn out its motor.
• Keep kids and pets out of the garage until it's fixed; a door resting on a failed spring is not stable.
• If your car is trapped, treat it as an emergency and call — that's a same-problem visit, booked any hour.

On the visit, we check the cables and end bearings that work with the spring, fit correctly rated springs — in pairs when your door has two, because they age together — and balance the door so it stays put halfway up and lifts evenly. A balanced door is easier on the springs, the cables and the opener all at once.

How long should springs last?

Springs are rated in cycles: one open-and-close is one cycle. Standard springs are commonly rated around 10,000 cycles — roughly 7 to 10 years for a household using the door as its main entrance. Cold makes spring steel more brittle, which is why Western North Carolina sees a run of snapped springs in the first hard freezes. If your springs are a decade old and the door is getting heavier or noisier, a tune-up visit can catch them before they strand your car.

Questions about a door that's suddenly heavy or loud? Call (828) 575-4543 — Daniela, our AI receptionist, answers 24/7 and will book a technician. Or read what a full tune-up checks.