Garage door springs are the workhorse of the entire door system. They store and release the mechanical energy that makes a several-hundred-pound door feel easy to lift. When a spring fails, the signs are usually hard to miss — but some are more obvious than others. Knowing what to look for helps you identify the problem quickly and avoid making it worse.
The Loud Bang or Pop
The most dramatic sign of a broken spring is a loud bang that seems to come from the garage, often described as a firecracker or a gunshot. This happens when the spring snaps suddenly under tension. It can occur while the door is in use or while the garage is unoccupied — springs hold their full tension at all times, even when the door hasn’t moved in hours.
If you hear this sound and the garage door subsequently won’t open normally, a broken spring is the most likely cause. Don’t attempt to operate the door until the spring has been inspected.
The Door Won’t Open or Opens Only an Inch or Two
Modern garage door openers have built-in force limits. When the springs fail, the opener suddenly has to work against the full dead weight of the door rather than a spring-assisted load. Most openers detect this increased resistance and stop — sometimes immediately, sometimes after lifting the door a few inches before reversing.
If your opener runs but the door barely moves, and you can hear the motor straining, a broken or failed spring is one of the top causes. The opener isn’t broken; it’s doing its job by refusing to force a door it can’t safely move.
The Door Is Much Heavier Than Normal
Disconnect the opener by pulling the emergency release cord and try to lift the door manually. A properly functioning door with intact springs should lift with relatively light effort — most balanced doors feel like lifting twenty to thirty pounds even if they weigh several hundred. A door with a broken spring will feel its full dead weight, often making it impossible to lift more than a few inches without significant effort.
This test is one of the most reliable ways to distinguish a spring failure from an opener problem. If the door lifts easily by hand but won’t move with the opener, the issue is likely the opener. If the door is extremely heavy manually, the spring is almost certainly the problem.
Visible Gap in the Spring
Torsion springs — the most common type, mounted horizontally above the door opening — will show a visible gap when they break. The spring is coiled tightly along a shaft, and when it snaps, the break creates a clear separation between coils that you can see from ground level. You don’t need to climb up to check; a broken torsion spring gap is usually visible standing in the garage and looking up at the spring assembly.
Extension springs — the type that run along the upper tracks on either side of the door — may show a similar separation or may appear stretched, distorted, or lying slack along the track when broken.
The Door Opens Unevenly or Crooked
Residential garage doors typically have two springs (one on each side of the torsion shaft, or one extension spring per track). When one spring breaks and the other is still intact, the door gets uneven lift — one side rises faster or higher than the other. This causes the door to travel crooked in the tracks, sometimes binding, sometimes causing the door to separate from the track entirely on the weaker side.
If you notice the door moving at an angle, or one side appearing higher than the other during travel, stop operating it immediately. Continuing to run an unbalanced door risks damaging the tracks, the opener, or the door panels themselves.
The Door Closes Too Fast
Springs also slow the door’s descent when closing. A door with broken springs may slam down faster than normal because the controlled resistance provided by spring tension is no longer present. A fast-closing door is a safety hazard and a sign that the counterbalance system has failed.
The Cables Are Slack or Lying on the Floor
This is a secondary sign rather than a primary one, but it’s worth understanding. When a torsion spring breaks, the cable tension that the spring normally maintains is released. The cables may appear loose, coiled on the floor, or hanging away from the door at the bottom corners. The cables themselves may be intact, but they appear failed because the spring that kept them taut is no longer functional.
What to Do If You Suspect a Broken Spring
Stop using the door. This is the most important step. Operating a door with a broken spring strains the opener, risks damaging the cables and tracks, and can cause the door to fall unexpectedly. If you need to use the garage, use a side entry door rather than operating the main door until the spring is repaired.
Spring replacement requires releasing any remaining tension in the old spring and handling components that are under significant mechanical stress. This work should be done by a trained technician. Visit our garage door spring repair page for information on what the repair process involves and how to schedule service. Our technicians serve Williamson County and are available to address spring failures throughout Franklin, Brentwood, Spring Hill, Nolensville, Fairview, and surrounding areas. Call (615) 538-5825 to arrange an appointment.