Garage Door Spring Broke or Cable Snapped? What to Do Right Now

Question 01

How do I know if a garage door spring or cable has broken?

A loud bang from the garage is the classic sign. After that, the door feels far heavier than usual or won't lift at all, and the opener may hum or strain without moving it. Look for a gap in a spring's coils, a loose or frayed cable, a door sitting crooked, or a roller that's come out of its track.

B&D Australia lists the spring signs in its broken spring safety guide. A spring holds a lot of tension, and B&D says one snapping often sounds like a firecracker or a gunshot. If it went overnight, the first thing you notice might be a door that won't budge in the morning.

Roller doors hide their springs inside the barrel at the top, so you won't see a gap. On a roller door the sign is weight. The door suddenly feels much heavier, or the opener strains to lift it. Heavy roller doors and spring tension has its own guide.

Question 02

What should I do right now?

Make the area safe, then get help. Stop using the opener and leave the door where it is. Keep people and pets out from under it. Don't pull the release cord if the door is open. Then call a garage door technician. A broken spring is a routine job for someone with the right tools.

1. 01Stop using the opener. B&D warns that running it can strain the motor and cables, and makes it more likely the door slams shut. Put the remotes away so nobody presses one out of habit.
2. 02Leave the door where it is. If it's shut, leave it shut. If it's open or stuck halfway, don't try to close it.
3. 03Keep everyone clear. No walking or parking under an open door. Keep kids and pets out of the garage till it's fixed.
4. 04Leave the release cord alone while the door is open or hanging crooked. More on that below.
5. 05Take a photo from a safe spot if you can see the springs or cables. It makes it easier to tell Thom what's happened.
6. 06Call 0402 882 653. Booked work runs 6am to 6pm, seven days, and Thom takes 24/7 emergency callouts across the Sunshine Coast.

Taking the call for a tenant? Tell them to stop using the door and leave it alone, then book the repair. Who pays, and what counts as urgent in a Queensland rental, is covered in garage door repairs in rental properties.

Question 03

What shouldn't I touch on a broken garage door?

Leave the springs, the lifting cables, the drums and the bottom brackets alone. They're all part of the door's balance, and they can still hold serious tension after something breaks. Don't pull the red release cord while the door is open either, because an open door with a broken spring can come down fast.

The springs are the dangerous part. B&D Australia warns that releasing or fitting springs the wrong way can cause broken bones, cuts, and face and joint injuries. Merlin's opener manual adds that door springs, brackets and their hardware are all under extreme tension.

So the safest thing you can do is very little. A closed door with a broken spring is fine to leave shut till the technician turns up. The risk starts when someone tries to move it.

Question 04

Can a garage door still open with a broken spring?

Sometimes, a little, but you shouldn't try. The springs do the heavy lifting, and the opener isn't built to take the door's full weight on its own. With a spring gone, it strains against all of it. Keep at it and you can wear out the motor or damage the cables. Stop pressing the remote and call.

Lifting it by hand is no better. Without a working spring you're lifting the whole door yourself, and B&D warns that trying it can lead to muscle strain or finger injuries. Even if you get it up, there's nothing holding it there.

A snapped cable is much the same. On a sectional door, a lifting cable runs up each side from a bottom corner. With one gone, that side has lost its support, so the door can hang crooked or jam in its tracks. If the door won't move and you can't see why, garage door won't open or close walks through the other common faults.

Question 05

My car is stuck in the garage. What now?

Leave the car where it is and call. Don't pull the release cord and try to lift a door with a broken spring, even to get to work. It's too heavy and it won't stay up. Thom takes 24/7 emergency calls on the Sunshine Coast, and a stuck car is what that line is for.

Sort a lift or a cab for the morning if you need one. Then ring and tell Thom what you can see, including whether the door is open or shut and what kind of door it is. That way he knows what he's walking into.

Emergency callouts are for a door that's left your car stuck or your home open. See 24/7 emergency garage door repairs for how after-hours calls work.

Question 06

Can I replace a garage door spring myself?

No. This is the one garage door job to leave to a technician. Springs are wound or stretched under heavy tension, and B&D says fitting them takes special tools like winding bars, plus the experience to use them. Setting the balance is a skill of its own. B&D says it plainly: replacing garage door springs isn't a DIY job.

Online videos can make it look quick, but the spring is under the same tension whoever's holding the bar. B&D's sectional door guide says to have a trained technician do it and make sure the door's balance is right afterwards. Garage door spring replacement is booked as a normal repair callout.

Got two springs and only one has broken? The other has done the same number of cycles and usually isn't far behind. The full answer, and what drives the price, is in why both springs usually get replaced.

Question 07

What happens when Thom arrives?

Thom makes the door safe first, then finds what's failed. The broken spring or cable is replaced with one that suits your door, and the parts that work alongside it get checked. Then the tension is set so the door balances, and it's tested by hand and under power.

1. 01Make it safe. If the door is open, it gets secured before anything else happens.
2. 02Find the fault. A snapped spring can leave a cable slack or off its drum, so the cables get checked too.
3. 03Replace the broken part. Springs are matched to the door's weight and size. They aren't one size fits all.
4. 04Check the rest. The cables, drums and bearings that work with the spring get a look while the door is apart.
5. 05Balance and test. A balanced door stays where it's left part way up, held by its springs alone. Merlin's opener manual uses that as the balance check. Then the door is run under power.

Repairs and servicing are booked as a callout valued between $200 and $300 depending on the door size and the labour involved. Every job is done by Thom, who has 3.5 years of hands-on experience and has trained across multiple garage door brands and systems.

He's based in Maroochydore and works across the Sunshine Coast, including Mountain Creek and Kuluin. For faults that aren't springs or cables, see garage door repairs, or book a callout.

Question 08

Why do garage door springs break?

Mostly, they wear out. A spring works every time the door opens and closes, and B&D says most springs are rated for around 10,000 cycles. Moisture can weaken the steel, so rust speeds things up. A busy door near the beach tends to need new springs sooner.

A garage door service checks the spring tension and balance and inspects the cables and drums, so a tired spring has a chance of being picked up before it lets go. For how long springs and other parts tend to last, see how long garage doors last.