How Do I Know If My Garage Door Spring Is Broken?

A garage door spring failure is the most common garage door emergency in North Alabama — and one of the most startling. Here are the six signs that tell you a spring has broken, from the most obvious to the ones people often miss.

Sign 1 — A Loud Bang From the Garage

Most homeowners describe a broken torsion spring as sounding like a gunshot or a heavy piece of furniture falling over. If you heard a loud bang from your garage — especially when you weren't opening or closing the door — a spring almost certainly just snapped. The sound comes from the enormous tension releasing all at once as the coil breaks.

This is the most definitive sign. If you heard the bang, go straight to what to do below — skip the rest of the diagnostic steps.

Sign 2 — The Door Won't Open (Or Barely Moves)

Your opener runs, makes its normal noise, but the door barely budges or doesn't move at all. You might see the opener carriage moving along the rail while the door stays put.

This happens because the opener is designed to move a balanced door — one where the spring counterbalances the door's weight. Without the spring, the opener is trying to lift 150–400 lbs of dead weight, which it simply can't do. Most openers sense the load and stop to protect their motor.

Sign 3 — A Visible Gap in the Spring Coil

Look at the horizontal metal shaft running above your garage door opening. If you have torsion springs, you'll see one or two tightly-wound coils on this shaft. A broken torsion spring will have a visible gap — typically a 2–4 inch separation where the coil snapped. You may also see a piece of the spring lying on the floor below.

For extension springs (which run along the sides of your door), look for a spring that appears stretched out, loose, or visibly in two pieces.

Sign 4 — The Door Feels Extremely Heavy

Pull the red emergency cord to disconnect your opener, then try to manually lift the door. A properly balanced garage door should feel nearly weightless — the spring does most of the work. A door with a broken spring will feel like lifting its full weight, typically 150–400 lbs. Most people can't lift it more than a few inches alone.

This is an important safety test. If the door is very heavy, do not attempt to manually use it. Get help and only move it if absolutely necessary for security.

Sign 5 — The Door Opens Crooked or Unevenly

On double-car garage doors with two torsion springs, if only one spring breaks, the door may open unevenly — rising higher on one side than the other. You'll see the door appear tilted or hear grinding as the off-balance door scrapes against the track.

This is more dangerous than a complete failure because the opener may continue running, putting enormous stress on the tracks, rollers, and opener mechanism. Stop using the door immediately if you notice this.

Sign 6 — The Opener Runs But Reverses Immediately

Many modern openers detect the resistance of a broken spring (the door being too heavy) and immediately reverse to protect the motor. You'll press the remote or wall button, the door moves an inch or two, and then reverses back up. If your sensors are aligned and nothing is blocking the door, a broken spring is the most likely cause.

See our article on why your garage door won't close for the full diagnosis flowchart.

Torsion Spring vs. Extension Spring — Which Did You Break?

What to Do When Your Spring Breaks

• Don't operate the opener. Using the opener with a broken spring strains the motor and can cause further damage — or worse, cause the door to fall.
• Disconnect the opener. Pull the red emergency release cord hanging from the opener rail to disconnect the door from the drive mechanism.
• If the door is open, use a clamp or locking pliers on the track above a roller to hold it while you're away. Never leave an open door unattended.
• If the door is closed, leave it closed. It's secure and won't go anywhere.
• Call for same-day service. Spring replacement is fast — most North Alabama technicians carry common spring sizes and can complete the job in 1–2 hours.

What It Costs to Fix in North Alabama

For a deeper dive on pricing, see our spring replacement cost guide.

Call a North Alabama Spring Repair Specialist