Garage door makes a loud bang - Fast Local Response, Upfront Pricing

Garage Door Makes a Loud Bang

A loud bang from your garage door almost always means a torsion spring just broke. The noise sounds like a gunshot or a car backfiring, and it happens in a fraction of a second. If you heard that sound and your door now won’t open – or opened partway and stopped – a broken spring is the most likely cause by a significant margin.

Call (512) 883-4374

The bang is the stored energy releasing all at once. A torsion spring sits on a metal shaft above your door and spends its entire working life under extreme tension. When it reaches the end of its cycle life, it doesn’t fade out – it snaps. The door goes from working normally to completely stuck, often in the same morning. A broken spring is not a minor inconvenience you can work around; it’s a safety issue that needs a trained technician before you use the door again.

Why It Happens

A Torsion Spring Broke

This is the cause roughly nine times out of ten. Torsion springs are wound under thousands of pounds of tension and rated for a finite number of open-and-close cycles. When one breaks, the snap is audible from inside the house and sometimes from the street. Look up at the horizontal shaft above the door – if you see a visible gap in one of the coils, or the spring looks like it has a section missing, that’s your answer.

A Lifting Cable Snapped or Jumped Off the Drum

Cables run along both sides of your door and work in tandem with the springs to lift the weight evenly. When a cable snaps under load, it can make a sharp cracking sound – not quite as loud as a spring, but close. If the door is now tilted to one side or one corner has dropped lower than the other, a cable problem is the likely culprit. You’ll sometimes see the cable lying loose on the floor or hanging off the drum at the top corner of the door frame.

A Roller or Hinge Failed Under Load

Metal rollers and hinges wear down over time, and a badly worn roller can shatter under the weight of the door. The bang from a roller failure is shorter and more of a crack than a boom. If the door is still moving but grinding, wobbling, or dragging on one side, look at the rollers along the edge of the door panels – a cracked or missing roller is sometimes visible from ground level.

The Door Came Off the Track

A door that jumps its track can do so with a sudden, jarring bang as the weight shifts and the door panel hits the inside of the frame. This usually happens when a cable or spring fails first, but it can also happen if something struck the door or if a roller gave out. If the door is visibly crooked inside the opening or you can see a gap between the door edge and the metal track, don’t try to force it – a door off its track can fall unexpectedly.

What to Do Right Now

• Stop using the door immediately. Do not press the wall button or the remote again. A door with a broken spring or failed cable is carrying unbalanced weight, and forcing it with the opener motor can damage the opener, bend the door panels, or cause the door to fall.
• Disconnect the opener if you need to get your car out. Pull the red emergency release cord hanging from the opener rail. This disconnects the door from the motor so you can lift it manually – but only try this if the door is fully closed and sitting on the ground. If the door is stuck partway up, leave it alone and call first.
• Look, don’t touch the springs or cables. You can safely look at the spring from a few feet away to see if there’s a gap in the coils. Do not handle a torsion spring, cable drum, or any component that is still under tension. These parts store enough energy to cause serious injury. This is genuinely dangerous work – it belongs with a trained technician who has the right tools and knows how to release that tension safely.
• Take a few photos. Snap a picture of the spring shaft, the cables on each side of the door, and the overall door position. This gives your technician a head start before they arrive and is part of how your local Marlow Garage Door Repair team documents every job under The Relay Visibility Guarantee.
• Call (512) 883-4374. A real person picks up, any time of day or night. Give them what you saw and heard – they’ll confirm what’s needed and get your local Marlow team scheduled.

How We Fix It

When your local Marlow Garage Door Repair technician arrives, the first thing they do is a full door inspection – not just the obvious broken part. A spring that failed may have put extra stress on the cables, drums, and bottom brackets, so the tech checks the whole system before writing the price.

Once the assessment is done, you get a written price before any work starts. That number doesn’t change when the job is finished. If a torsion spring broke, the repair falls under our garage door spring repair service. If a cable snapped or came off the drum, that’s our garage door cable repair service. The two often go together, because a spring failure and a cable failure frequently happen around the same point in the door’s life.

Most spring and cable repairs are completed in a single visit. After the repair, the tech runs the door through a full cycle, adjusts the spring tension, and takes before-and-after photos – part of The Relay Visibility Guarantee on every job. Every repair is covered by our 365-Day Done Right Promise: if the fix isn’t right, we make it right, in writing, for a full year.

Frequently Asked Questions

Get It Fixed

A broken spring or failed cable isn’t a problem that fixes itself. Call (512) 883-4374 – a real person answers, any time – or book online and your local Marlow Garage Door Repair team will handle the rest. You’ll get a live arrival time, a written price before work starts, and a repair backed by the 365-Day Done Right Promise.

Written by Jaylen Ross, Owner & Lead Technician at Marlow Garage Door Repair, part of the Relay Home Co. family of locally operated home-service businesses since 2002.