How to Tell If Your Garage Door Spring Is Broken

Two Kinds of Springs (Know Which You Have)

Before diagnosing, it helps to know your system. Nearly all residential doors use one of two spring types, and where you look for damage depends on which you have.

Torsion springs are the most common on modern doors. They mount horizontally on a metal shaft (the torsion bar) above the door opening and wind up tightly as the door closes. Extension springs run horizontally along the tracks on each side of the door and stretch as the door lowers. Older and lighter doors often use these.

• Torsion: one or two springs on a bar centered above the door
• Extension: long springs running parallel to the horizontal tracks on both sides
• Doors typically have springs rated for 10,000 cycles (roughly 7 to 14 years of normal use)

The Clear Signs of a Broken Spring

A failed spring rarely leaves you guessing. Watch for these signs, roughly in the order you're likely to notice them.

• Loud bang from the garage: A breaking spring releases stored tension instantly and often sounds like a firecracker or a metal pipe hitting concrete. Many people hear it from another room.
• Door won't open at all: With the counterbalance gone, an opener motor sized only to guide a balanced door usually can't lift the full dead weight. The opener may hum, strain, or reverse.
• Door lifts a few inches then stops: A common opener safety feature senses the excess load and stops or reverses. If it rises 4 to 6 inches and quits, suspect a spring.
• Visible gap in a torsion spring: Look at the spring on the bar above the door. A broken torsion spring shows a distinct 1 to 2 inch gap where the coil separated. An intact spring is one continuous tight coil.
• The door is extremely heavy by hand: A balanced door lifts with one hand. If it feels like dead-lifting a loaded appliance, the spring isn't doing its job.
• Crooked or sagging door: With extension springs, one side may drop lower than the other, making the door look tilted in the tracks.
• Slack or dangling cables: The lift cables should stay taut. Loose, drooping, or unwound cables often accompany a broken spring.
• Jerky or noisy operation: In the days before a full break, some doors move roughly or make grinding noises as a weakened spring fails.

How to Check Safely

You can confirm a broken spring with a simple, low-risk inspection, but only if the power is off and you never touch the spring itself. Never try to loosen, adjust, or remove a spring, cable, or the fittings that hold them. A wound spring or the bar it sits on stores enough energy to cause serious injury.

Follow these steps in order:

• Unplug the opener or pull the emergency release cord (the red handle) so the motor can't run.
• Look at the torsion spring above the door with a flashlight. A visible gap in the coil is a definitive sign.
• For extension springs, check each side along the tracks for a snapped or stretched-out spring and note whether one side hangs lower.
• With the opener disconnected, lift the door by hand only a foot or so. A working door stays put around waist height; a door with a broken spring feels very heavy and slams down if you let go, so keep hands and feet clear.
• Inspect the cables for slack or fraying without touching them.

Why You Shouldn't Keep Operating the Door

It's tempting to force the door with the opener a few more times, but this is a mistake. Running the opener against an unbalanced door burns out the motor, strips the drive gear, and can snap the cables or bend the tracks, turning a spring repair into a much larger bill.

There's also a safety issue: without spring counterbalance, a raised door can crash down with its full weight. Don't park a vehicle, or let people or pets, under a door you suspect has a broken spring. If the car is trapped inside, wait for help or have two able people carefully lift and prop the door rather than relying on the opener.

What to Do Next, and What It Costs

Spring replacement is one of the few garage door jobs that most homeowners should not DIY. Torsion springs in particular are wound to extreme tension, and winding a new one incorrectly is a leading cause of serious garage-injury reports. A licensed technician has the winding bars, correctly rated springs, and experience to do it safely in under an hour.

One practical tip: if you have two springs and one broke, replace both. They wear at the same rate, so the second is likely near failure, and paying one service-call fee covers both. The figures below reflect typical 2026 US pricing including parts and labor. Prices vary by region, door size, and spring rating (high-cycle springs cost more but last longer).