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It sounds like the kind of thing a repair company would say to win a job: "don't touch the springs, they're dangerous." So let's be precise about what the danger actually is, where it comes from, and — just as importantly — what you can safely do on your own door without calling anyone.
How dangerous are they really?
Garage doors are the heaviest moving object in almost every Australian home, and the springs are what hold that weight. Hospital emergency departments here and overseas see a steady stream of garage-door injuries every year — crushed and amputated fingers, facial fractures, and serious lacerations — and the worst of them cluster around one activity: people working on springs and cables themselves.
Everyday use of a well-maintained door is not the risk. Modern openers are required to auto-reverse on obstruction, and the safety requirements for powered garage doors sit under Australian Standard AS/NZS 60335.2.95, published by Standards Australia. The risk concentrates at the moment someone puts a spanner or screwdriver on a component that's under tension. WorkSafe WA treats high-tension spring work as a task for competent, properly equipped operators — and that's for tradespeople, with training, on work sites.
Why springs hold so much force
A typical Perth sectional door weighs 80–180 kg. For the motor to lift it, the springs must counterbalance nearly all of that weight at every point of travel. A wound double-door torsion spring stores several hundred newton-metres of energy — think of the door's full weight, held in a coiled piece of spring steel about a metre long, waiting to be released.
Three things make that energy uniquely treacherous for a home handyperson:
- The tension is invisible. A fully wound spring looks identical to an unwound one — there's no gauge, no warning, nothing to see until it lets go.
- The proper tools are specific. Torsion springs are wound with hardened winding bars seated in the winding cone. A screwdriver in the cone — the classic improvisation — can shear or slip out under load, and the cone then spins with the full force of the spring behind it.
- The door's weight is part of the system. Release the wrong component and the counterbalance disappears — the door itself can drop like a guillotine, and bottom brackets, cables and drums all carry that same load.
The bottom bracket trap
The most underestimated component isn't the spring — it's the bottom bracket the lift cable anchors to. It looks like ordinary bolted hardware, but with the door closed it's carrying full spring tension through the cable. Unbolting it releases everything at once. Never undo a bottom bracket with the springs wound.
How the injuries actually happen
The pattern in real incidents is remarkably consistent. It's rarely the spring snapping spontaneously while someone stands nearby — a breaking torsion spring mostly stays contained on its shaft. It's almost always one of these:
- Winding or unwinding a torsion spring with improvised tools that slip under load
- Unbolting a bracket, drum or set screw while the system is still under tension
- Removing or adjusting an extension spring without realising it's stretched, or with no containment cable fitted
- Working under a raised door that isn't clamped or supported when the counterbalance is disturbed
- Fingers between door panels, in tracks, or on cables when the door moves unexpectedly
Notice what's common to all five: each one requires someone to have started working on the door. That's the honest answer to "are garage door springs dangerous?" — barely at all while you leave them alone, severely so the moment tension is disturbed without the right tools and training.
Torsion vs extension: the risk difference
The two spring systems fail differently, and it changes the hazard. A torsion spring breaks with a bang — often mistaken for a break-in — but usually stays wrapped around its shaft. An extension spring that snaps without a containment cable recoils at high speed, and older Perth tilt doors are exactly where missing containment cables are most common.
If you're not sure which system your door runs, our torsion vs extension guide shows how to identify each in ten seconds from inside the garage. If you have extension springs, check for a steel cable threaded through the centre of each spring — fitting missing containment cables is a minor job and the single best safety upgrade an older door can get.
What's safe to DIY — and what never is
Safe for any homeowner
- Test the balance: pull the manual release with the door down, lift the door to waist height and let go — it should hold roughly in place
- Look and listen: gaps in spring coils, frayed cables, a crooked door, new grinding or squealing
- Lubricate hinges, rollers and the torsion shaft bearings twice a year with a garage-door-specific lubricant (never grease the tracks)
- Test the opener's auto-reverse monthly with a solid object (like a piece of timber) under the closing door
- Keep tracks clear of debris, and keep fingers away from panel joints while the door moves
Never DIY — call a technician
- Winding, unwinding, adjusting or replacing any spring
- Loosening set screws on winding cones or cable drums
- Unbolting bottom brackets or anything a lift cable anchors to
- Replacing, re-seating or re-tensioning lift cables
- Removing an extension spring or its containment cable
- Working under a raised door without it clamped and supported
The one-sentence rule
If the step involves releasing, adding or redirecting tension — on a spring, cable, drum or bracket — it's a technician's job. Everything on the safe list above involves none.
If a spring has already broken
A single loud bang from the garage followed by a door that won't lift is the classic broken spring. The door is now dead weight — 80 kg or more with nothing counterbalancing it.
- Stop using the opener. Every attempt drags the door's full weight through the motor, cables and brackets and grows the repair bill.
- Don't pull the manual release while the door is up — with a broken spring, nothing is holding the door, and it can fall.
- Leave the door where it is, park on the street, and keep children and pets out of the garage.
- Call for the repair — spring replacement is a same-day job across the Perth metro area, and we carry common sizes on the van.
Our broken spring and cable guide covers diagnosis in more detail, and if the car is trapped before work, emergency garage door repairs covers after-hours response.
What professional replacement costs
The reason DIY spring work tempts people is the assumption that professional replacement costs a fortune. It doesn't. These are our actual price-list ranges, supplied and fitted:
- One broken spring — $240–$280, the most common same-day repair
- A matched pair (×2) — $440–$550
- Safety check-up of the whole door — $120
- Full service — from $140 plus parts
- After-hours or emergency attendance — add $500
Set against a hand surgery waiting list, $240–$280 for the right spring fitted at the right tension is the cheap option. The full price breakdown lives in our spring replacement cost guide, and the price calculator gives an instant range for any repair.
In years of spring call-outs, the expensive jobs are never the broken springs. They're the doors someone had a go at first.