If you heard a loud bang from the garage — like a gunshot or a firecracker — and the door now won't open, a snapped torsion spring is by far the most likely cause. The spring, not the opener motor, carries the door's weight, so a broken spring leaves the door too heavy to lift. Don't keep pressing the remote and don't pull the manual release to lift the door — call a technician for same-day spring replacement.
Safety First: Leave the Door Alone
A door with a snapped spring has lost its counterbalance and now carries its full weight — often 60–150 kg. It can slam shut without warning. Don't stand or park under it, don't let kids near it, and don't try to lift it. Fortex Door Services replaces snapped springs same-day across the Gold Coast.
Call 0434 099 873 NowFree phone diagnosis: call and describe what happened — the bang, what the door does when you press the remote, whether you can see a gap in the spring above the door. We can usually confirm the problem and give you a firm quote before we arrive.
What Was the Loud Bang From My Garage?
A garage door torsion spring is a tightly wound steel coil mounted on a shaft above the door. When the door is closed, that spring stores enormous tension — it's what makes a heavy door feel light to the opener motor. Torsion springs are rated for roughly 10,000 open-close cycles. At four cycles a day, that's around seven years. When the steel finally fatigues, it doesn't wear out quietly — it snaps and releases all of that stored tension at once. That release is the bang you heard, and it's loud enough that many homeowners think something hit the house.
You can usually confirm it visually without touching anything: with the door closed, look at the spring above the opening. A healthy torsion spring is one continuous coil. A snapped one has a clear gap of a few centimetres where the coil separated. On the Gold Coast, salt air corrosion often speeds this up — rusty springs fail earlier than their cycle rating.
Why Won't the Opener Lift the Door Anymore?
Your opener motor — whether it's a Merlin, B&D, ATA or Steel-Line — was never designed to lift the door's actual weight. The spring counterbalances the door so the motor only has to guide it. With the spring snapped, the motor is suddenly asked to dead-lift 60–150 kg. It can't. Typically the door either doesn't move at all, or rises a few centimetres and stops as the motor's safety overload kicks in. If this sounds like your door but you never heard a bang, see our guide to a garage door that won't open all the way — a worn (not yet snapped) spring produces the same symptom.
What NOT to Do After a Spring Snaps
- Don't pull the manual release cord and lift the door. The red release cord disconnects the door from the opener — which means nothing is holding it except you. A full-weight door can drop and cause serious injury.
- Don't keep pressing the remote. Every attempt strains the motor against a load it can't lift. This strips the nylon drive gear and can burn the motor out — adding a motor replacement costing several times more to what should be a spring job.
- Don't touch the spring, cables or winding cones. Even a broken spring system holds residual tension, and the lift cables may be under load. Spring and cable work is strictly technician-only.
- Do keep people, pets and cars clear of the door, leave it connected to the opener, and call for same-day spring replacement.
What Does Spring Replacement Cost on the Gold Coast?
The price of our spring replacement service depends on your door type and size, the spring size it needs, and its cycle rating — heavy-duty springs for large double doors and high-cycle springs rated 25,000+ cycles sit above standard residential pairs. Call for a fast quote — we can usually price it over the phone. We always replace springs in matched pairs — the second spring has done the same cycles as the one that snapped and will fail soon after if left.
| Symptom | Likely cause | DIY or Pro | The fix |
|---|---|---|---|
| Loud bang, door won't open, visible gap in spring | Snapped torsion spring | Technician onlyCall 0434 099 873 | Spring replacement (matched pair, incl. labour) |
| Bang + door sits crooked or cables hanging loose | Spring break that also threw the cables off the drums | Technician onlyCall 0434 099 873 | Springs + cables reseated or replaced |
| Motor hums or runs but door doesn't move (after repeated remote presses) | Stripped opener drive gear from lifting against dead weight | Technician onlyCall 0434 099 873 | Motor repair or replacement |
| Door very heavy but no bang heard, opens partway | Worn or stretched spring losing tension | Technician onlyCall 0434 099 873 | Spring replacement (before it snaps) |
Call 0434 099 873 for a fast quote — we can usually price it over the phone from your description of the symptom.
What Does Waiting Cost?
A snapped spring doesn't get cheaper with time — it gets more expensive. Repeatedly trying the opener strips the drive gear, and motor repair or replacement costs several times what the spring alone would have. Forcing the door by hand can pull the lift cables off their drums and bend the tracks, adding cable and track work to the bill. And a car trapped in the garage before work tends to turn a planned repair into an emergency call-out — after-hours service carries a premium. A same-day booking at standard rates is almost always the cheapest way out.
What the Technician Actually Does
Spring replacement is about an hour on site: we disconnect the opener, unwind any residual tension with proper winding bars, remove the broken pair, fit new springs matched to your door's weight and height, re-tension them, reseat the cables on the drums, rebalance the door and test the opener's travel limits and safety reverse. We carry common torsion spring sizes in the van, so most Gold Coast jobs are done in a single same-day visit — whether you're in Robina, Burleigh Heads or Coomera.
Why Gold Coast Homeowners Call Fortex
- Same-day spring replacement across the Gold Coast
- Firm quote over the phone before we arrive — no surprises
- All major brands serviced: Merlin, B&D, ATA, Steel-Line, Superlift
- Springs always replaced in matched pairs, door rebalanced and tested
Frequently Asked Questions
What was the loud bang from my garage door?
A loud bang from the garage — often described as a gunshot or firecracker — is almost always a torsion spring snapping. The spring releases years of stored tension in an instant, which produces the bang. Check above the closed door: a visible gap in the coiled spring confirms it has broken.
Why won't my garage door open after the loud bang?
The torsion spring does the heavy lifting, not the opener motor. A typical door weighs 60–150 kg, and the motor only guides it while the spring counterbalances the weight. With the spring snapped, the motor cannot lift the full dead weight, so the door stays down or rises a few centimetres and stops.
Is it safe to open the garage door manually after a spring breaks?
No. With a broken spring the door has no counterbalance and carries its full weight — often over 100 kg. If you pull the red manual release cord and lift, the door can slam down on you or drop mid-lift. Leave the door connected to the opener and call a technician.
Can I keep pressing the remote to get the door open?
Don't. Each press forces the opener motor to strain against a door it cannot lift, which strips the nylon drive gear and can burn out the motor. That turns a straightforward spring replacement into a spring job plus a motor replacement costing several times more. Stop using the opener until the spring is replaced.
How much does garage door spring replacement cost on the Gold Coast?
The price depends on your door type and size, the spring size and cycle rating it needs, and whether it's a standard or after-hours call-out. Springs are always replaced as a matched pair including labour. Call 0434 099 873 and we can usually give you a firm, free quote over the phone.
Why do garage door springs break?
Torsion springs are rated for around 10,000 open-close cycles — roughly 7–10 years of average use. Every cycle flexes the steel until it fatigues and snaps, usually as the door starts moving. Gold Coast salt air accelerates this through corrosion, which is why coastal springs often fail earlier.
Should I replace both springs if only one broke?
Yes. Both springs were installed together and have done the same number of cycles, so the unbroken one is at the same fatigue point and will likely fail soon. Replacing the pair in one visit costs far less than a second call-out weeks later and keeps the door correctly balanced.
How quickly can a snapped garage door spring be replaced on the Gold Coast?
Same-day in most cases. Fortex Door Services carries common torsion spring sizes in the van and services all Gold Coast suburbs, from Coomera to Coolangatta. A standard spring replacement takes about an hour on site, and the door is rebalanced and tested before we leave.