A loud bang coming from inside your garage is almost always the sound of a torsion spring breaking. This is one of the most common and startling events in garage door ownership. The spring snaps suddenly under years of tension, releasing all its stored energy at once and creating a noise that can be heard throughout your home.

What Causes a Garage Door to Make This Noise

Torsion springs are tightly wound metal coils mounted on a shaft above your garage door. They counterbalance the weight of the door, making it easy to lift manually or with an opener. These springs are under extreme tension every single day, cycling thousands of times over their lifespan.

Most residential torsion springs are rated for 10,000 to 20,000 cycles, which translates to roughly seven to ten years of typical use. Once a spring reaches the end of its cycle life, the metal fatigues and eventually fails. When it breaks, the release of tension is instantaneous and incredibly loud, often compared to a gunshot or firecracker.

Signs Your Spring Has Broken

After hearing the bang, you can confirm a broken spring by looking for these telltale indicators:

  • A visible gap in the torsion spring above the door where the break occurred
  • The garage door will not open, or opens only a few inches before becoming extremely heavy
  • Your garage door opener strains or fails to lift the door completely
  • The door closes too fast or slams down when you try to lower it manually
  • One side of the door hangs lower than the other if only one spring broke on a two-spring system

What to Do After the Bang

First, disconnect your garage door opener by pulling the emergency release cord. This prevents the motor from trying to lift the unsupported door weight and burning out. Do not attempt to force the door open or closed, as this can cause cable damage, bent tracks, or personal injury.

Contact a professional Best Garage Door Repair & Services technician immediately for spring replacement. A qualified technician has the specialized tools and training to safely remove the broken spring and install a new one with proper tension calibration. Most repairs can be completed the same day, restoring full function to your door.

If you have a two-car garage door or an exceptionally heavy door, consider replacing both springs at once even if only one broke. The second spring has experienced the same wear and will likely fail soon, saving you a second service call and additional downtime. For more helpful information about garage door maintenance and repairs, visit our Blog.