Most homeowners never look at their garage door springs until something goes wrong — usually at the worst possible moment, like a Monday morning when the car is trapped inside. The good news is that a broken spring almost always announces itself, if you know what to look, listen, and feel for. You don’t need any tools or experience to run the checks in this guide, and five minutes of inspection can save you from misdiagnosing the problem or forcing a door that should be left alone.
Before we start: garage door springs come in two types. Torsion springs are the thick coils mounted on a steel shaft directly above the door, inside the garage. Extension springs run along the horizontal tracks on either side of the door. Both do the same job — counterbalancing the door’s weight — and both fail in recognizable ways.
The Classic Sign: A Loud Bang
Ask anyone who has lived through a spring failure and they will describe the same thing: a bang like a gunshot or a firecracker going off in the garage, loud enough to shake the walls and rattle the neighbors. A wound torsion spring stores an enormous amount of energy, and when a coil snaps, all of it releases in an instant. If you heard that sound and the door suddenly refuses to open, you very likely have your answer already.
That said, springs can also fail quietly. Older springs that have been weakening over months sometimes give up with nothing more than a dull pop you might not even notice. So don’t rule out a broken spring just because you didn’t hear anything dramatic.
Look at the Spring: The Tell-Tale Gap
This is the most reliable visual test. Stand inside the garage with the door closed and look at the torsion spring above the door. A healthy spring is one continuous, tight coil. A broken spring shows a visible gap — usually one to three inches — where the coil separated. If you can see daylight through the middle of the coil, the spring has snapped.
For extension springs, look along both horizontal tracks. A working extension spring is a neat, stretched coil with a safety cable running through it. A failed one may be hanging loose, stretched far out of its normal shape, or visibly in two pieces. Compare the two sides: if one spring looks different from the other, that side is your problem.
Try the Manual Lift Test
Pull the red emergency release cord to disconnect the opener, then try lifting the door by hand. A door with working springs feels surprisingly light — most adults can lift it with one hand — and it should stay put when you let go halfway. If the door feels like dead weight (a standard residential door weighs 130 to 300+ pounds without spring assistance), slams back down, or won’t budge at all, the springs are not doing their job.
Be careful with this test: if the door is extremely heavy, don’t wrestle it. A door that heavy can hurt you if it slips, and forcing it can damage the tracks, rollers, and opener.
Other Clues: Crooked Movement and Straining Openers
When only one of two springs breaks, the door often rises unevenly — one side lifting faster than the other — or it jerks and shudders on the way up. You might also notice the opener motor humming loudly or straining. Openers are designed to guide the door, not lift it; making an opener drag a dead-weight door can burn out its motor, turning a straightforward spring replacement into a much bigger and more expensive repair.
- A loud bang from the garage, followed by a door that won’t open
- A visible gap of an inch or more in the coil above the door
- A door that feels extremely heavy when lifted manually
- A door that rises crookedly, jerks, or won’t stay open halfway
- An opener that hums or strains but barely moves the door
- An extension spring hanging loose, stretched out, or in two pieces
Symptom Quick-Reference
| What you notice | What it usually means |
|---|---|
| Loud bang, then door won’t open | Torsion spring snapped |
| Visible gap in the coil | Broken torsion spring — confirmed |
| Door very heavy by hand | Springs lost tension or broke |
| Door lifts crookedly | One of two springs failed |
| Opener strains or hums | Opener fighting a dead-weight door |
What to Do Next (and What Not to Do)
If your checks point to a broken spring, stop using the door. Don’t keep hitting the opener button hoping it will catch — that’s how motors burn out and cables jump their drums. And whatever you do, don’t try to replace or adjust the spring yourself. A wound torsion spring holds enough force to cause serious injury, which is why this is one of the few home repairs that genuinely belongs to professionals.
A spring replacement is usually a quick job for a professional — most take under an hour. If your door shows any of the signs above, call Coppell Garage Door Experts at (945) 404-0050 and we’ll confirm the diagnosis and give you an honest, upfront price.