Signs of a Failing Torsion or Extension Spring on Your Garage Door

What Does a Broken Garage Door Spring Sound Like?

A broken torsion spring makes a loud bang, often described as a gunshot or a car backfiring, because the coil releases years of stored tension in a fraction of a second. Homeowners across Brookfield, Wauwatosa, and Waukesha frequently call us describing the exact same sound coming from an empty garage. If you heard it, the spring has already failed even if the door still looks normal. Don't run the opener again until a technician has looked at it. Cycling a door on a snapped spring puts the full weight of the panel on the opener's drive gear and cables, which turns a $200 spring job into a much bigger repair.

Why Won't My Garage Door Lift If the Spring Is Broken?

The spring, not the opener, does almost all the work of lifting a garage door, so a broken one leaves the door too heavy to raise. Most residential doors weigh 130 to 400 pounds, and the torsion or extension springs counterbalance nearly all of that weight so the opener only has to handle the last bit of lifting force. Try lifting the door manually with the opener disconnected. If it feels like dead weight and barely budges, or if the opener strains, grinds, or reverses partway up, a spring has lost its tension or broken outright.

How Do I Know If a Torsion Spring Has Snapped?

Look at the spring mounted horizontally above the door, directly over the track. If there's a visible gap in the coil, roughly a half inch to an inch of separated metal, the spring has broken and needs replacement, not repair. Torsion springs are wound under extreme tension and store enough energy to cause serious injury, which is why we never recommend homeowners attempt this themselves. When you call Wisconsin Garage Door Pro, a real person answers in under 30 seconds, no call centers and no hold music, and we can usually get a technician out the same day across the Milwaukee metro.

What Are the Warning Signs of a Failing Extension Spring?

Extension springs run along the horizontal tracks on either side of the door and stretch as the door moves, and they typically show wear through slack cables, a sagging section of track, or one side of the door drooping lower than the other. Unlike torsion springs, a failing extension spring doesn't always leave an obvious gap, since the coil is stretched rather than wound. Watch for a spring that looks longer or thinner on one side than the other, or safety cables that have gone slack, since that's a sign the spring underneath has already lost its grip. Extension springs are common on older Milwaukee and Madison-area homes built before torsion setups became standard, and they generally wear out faster than torsion springs.

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Why Does My Garage Door Move Unevenly When One Spring Fails?

Most garage doors run on two springs, and when only one fails, the door tilts and moves in a jerky, unbalanced motion because one side is still being lifted while the other drags. You might notice the door hanging noticeably lower on one corner, scraping against the track, or stopping partway with a visible lean. This uneven load doesn't stay contained to the spring. It puts extra strain on the opposite spring, the cables, and the opener motor, so a single failed spring can cascade into a full system repair if it's ignored for more than a few days.

How Much Does Garage Door Spring Replacement Cost in Milwaukee?

Garage door spring replacement in the Milwaukee area typically runs $200 to $350 for a single torsion spring and $150 to $300 for extension springs, including parts and labor. Costs shift based on door weight, spring size, and whether both springs need to be replaced at once, which we generally recommend even if only one has broken, since the second is usually close behind on wear. Wisconsin Garage Door Pro was named to the Garage Door Handbook Top 100 Garage Door Companies of 2026 and offers same-day spring repair across the Milwaukee metro, from Brookfield and Mequon to Waukesha and West Allis, along with the greater Madison area.

Wisconsin winters add their own wear pattern. Repeated cold contraction and expansion of the steel coil, combined with road salt tracked into the garage, speeds up metal fatigue and corrosion on springs that might otherwise last another year or two in a milder climate. If your spring is already a few years old, a hard subzero stretch is often what finally pushes it past its breaking point.

Should I Replace a Garage Door Spring Myself?

No, garage door spring replacement is not a safe DIY project, because the spring stores enough tension to cause serious injury or worse if it's released or wound incorrectly. Torsion springs in particular require special winding bars and precise turn counts specific to your door's weight and size, and getting it wrong can send the spring or bar flying with real force. Beyond the injury risk, an improperly balanced spring puts uneven strain on your opener and can shorten the life of your entire door system. Check our garage door safety guidance for what's safe to inspect yourself, but leave the spring itself to a licensed technician.

A loud bang, a door that won't lift, a visible gap in the coil, or a door moving unevenly are the four clearest signs your garage door spring has failed or is about to. None of them get better on their own, and running the door on a bad spring risks damage to the opener, cables, and tracks. Founded by Adam Gilbert, Wisconsin Garage Door Pro handles emergency spring repairs 24/7/365 with no after-hours surcharges, and same-day service is available across Milwaukee, Waukesha, Washington, Ozaukee, Racine, Walworth, Jefferson, and Dodge counties. Contact Wisconsin Garage Door Pro or call (414) 375-5533 in Milwaukee or (608) 466-6256 in Madison to get a technician on the way.

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