Broken Garage Door Spring? What to Check Before You Call

The sound is unmistakable. A sudden, violent bang from the garage that sounds like a gunshot. It’s not. It’s the sound of a high-tension torsion spring snapping. This is the single most common catastrophic failure we see on garage doors across Toronto and the GTA. The first instinct is to hit the opener button. Don’t. The second is to try lifting the door manually. Definitely don’t. That door, which felt weightless before, is now 250-400 pounds of dead weight. Your opener isn't built to lift that, and neither is your back.

How a Torsion Spring Actually Fails After ~10,000 Cycles

A lot of people think the electric opener does all the heavy lifting. It doesn't. The opener’s job is just to get the door moving and guide it along the tracks, overcoming the inertia and the friction of the rollers. The real muscle is the torsion spring system mounted on a hollow steel shaft, or torsion tube, above the door. When the door is closed, the springs are tightly wound, holding a massive amount of potential energy. As the door opens, the springs unwind, using that stored energy to counterbalance the door's weight, making it feel light enough for a person or a small motor to move. The opener itself should only be handling about 10-15 pounds of force.

These springs are rated for a specific number of cycles—one cycle is one full open and close. The standard builder-grade springs installed in most new homes across the GTA are 10,000-cycle springs. If you use your garage as a main entrance, opening it four to six times a day, you’ll hit that 10,000-cycle limit in about five to seven years. It’s a simple matter of metal fatigue. The high-carbon steel wire, often a .243 or .250 gauge for a standard 16x7 insulated double door, can only be twisted and untwisted so many times before it reaches its elastic limit and breaks. The break is almost always clean and sudden. It happens because a microscopic crack forms and then propagates across the wire with each cycle until it fails completely. We see it a lot during Toronto’s deep cold snaps in January and February. Extreme cold below -15°C can make the steel more brittle, and a spring that was already near its limit will often choose a frigid morning to finally let go.

The Telltale Signs of a Break

Besides the loud bang, which is the sound of thousands of pounds of stored torque releasing in an instant, there are several clear indicators that you have a broken spring. The most obvious is a visible gap in the spring itself. Look at the spring (or springs) on the torsion bar directly above the closed door. If one is broken, you'll see a 2-to-3-inch separation in the coils where the metal snapped. If you have two springs, one might be broken while the other is intact, though its partner has now been subjected to a violent shock and is carrying the entire load, making its own failure imminent.

Another sign is what the opener does. When you press the button, you might hear the motor hum for a second, but the door will only lift an inch or two before stopping and reversing. Modern openers from LiftMaster, Chamberlain, and Genie have sophisticated logic boards that monitor the force. When the opener tries to lift and immediately encounters 300+ pounds of resistance instead of the expected 15, it registers an obstruction. It's a safety feature that's now preventing the opener from stripping its main drive gear, which is often made of nylon, or burning out the motor. You may also see that the lifting cables on either side of the door have gone slack or even unspooled from their drums at the ends of the torsion bar, looking like a tangled mess of steel spaghetti. This happens because there's no spring tension pulling on the torsion bar to keep the cables taut.

Initial On-Site Diagnosis: Our First 5 Minutes

When we arrive, our first priority is confirming the issue and ensuring the area is safe. Our process is methodical because assumptions lead to mistakes. A typical diagnosis, say at a home in Scarborough with a standard double door, looks like this:

1. We greet the customer but our eyes are already on the door from the driveway. We're looking at the top section. Is it bowing or flexing in the middle? This indicates an opener trying to pull up a dead-weight door, putting immense stress on that top panel. 2. Inside the garage, we don't touch anything yet. We stand back and use a high-powered flashlight. First, we illuminate the torsion spring(s). We're looking for the tell-tale 2-inch gap. We also check if it's a single spring on a 16-foot door, a common cost-saving measure by builders that we often recommend upgrading. 3. Next, the flashlight beam goes to the drums at either end of the torsion shaft. We check if the cables are properly seated in the grooves or if they've jumped and are tangled. A thrown cable is a direct result of the sudden loss of tension. 4. Then, we look at the opener itself. Specifically at the rail and the chain or belt. Is it sagging more than usual? Sometimes, when an opener tries and fails to lift the door, the force can cause the gear and sprocket assembly to fail. We might even see a small pile of white or black plastic shavings on the floor directly under the motor housing—a dead giveaway that the main drive gear has been stripped. 5. Finally, we check the door's general condition. Are the rollers worn? Are the hinges cracked? Is the bottom bracket rusted? A broken spring is often a catalyst for a full system inspection.

Before You Call: A Quick, Safe Inspection

You can’t fix this yourself—winding torsion springs requires specialized steel winding bars and a deep understanding of the stored energy, making it extremely dangerous for a DIYer. But you can gather information that helps us arrive with the exact right parts for the job. Our service call is a flat $29 to get a licensed and insured technician to your door, usually within 30-45 minutes anywhere in the GTA. When we know what we're walking into, we can work even faster.

First, for your safety, unplug the garage door opener from the ceiling outlet. Do not touch the springs, cables, drums, or any related parts. A single unbroken spring in a pair is still holding tremendous force.

• Stand back in your driveway and get a clear look at the door. Is it a single-car (8 or 9 feet wide) or a double-car (16 feet wide) door? Note if it has a full row of windows or appears to be a heavy, 2-inch thick insulated model like a Garaga Standard+ R-16 or a Richards-Wilcox Landmark R-18.4. This detail helps us estimate the door's weight.
• Look at the torsion spring(s) directly above the closed door. Do you see one spring or two? Is there a visible gap in one of them? A single spring failure on a double door is a common scenario in many subdivisions in Milton and Brampton.
• Check the lift cables running from the bottom corners of the door up to the drums at each end of the torsion bar. Are they both taut and properly wound, or is one or both of them loose, hanging, or tangled? Be specific if you can.
• Take a quick look for a brand sticker on the door if you can find one, usually on the inside bottom or side edge. Common brands we see are Clopay, Amarr, Steel-Craft, and Wayne Dalton. This tells us about the door's construction and potential quirks, like Wayne Dalton's unique TorqueMaster spring system.
• Measure the height of the door itself. Is it a standard 7-foot door or a taller 8-foot door? This changes the spring calculation and the number of winds required.
• If you have very little space between the top of the door and the ceiling (what we call a low-headroom setup, common in older Toronto laneway garages and some post-war bungalows), let us know. This requires specific procedures and sometimes double-track hardware.

Having this information helps us confirm we have the exact spring wire, or a suitable engineered equivalent, on the truck. Our trucks stock dozens of sizes, from lighter .2187 wire for single aluminum doors to heavy .283 wire for oversized custom wood doors in areas like Hogg's Hollow.

The GTA Climate Factor: Why Springs Break in Winter

We're not imagining it; our phones ring off the hook for broken springs during the first deep freeze of the year. The specific climate of the Greater Toronto Area plays a huge role in the lifespan and failure of garage door parts. The extreme temperature swings, from a humid 30°C in the summer to a dry, biting -25°C in the winter, are brutal on metal components.

Cold is the primary enemy of a torsion spring. As the temperature drops, the steel contracts and becomes less ductile—more brittle. A spring that has already endured 9,500 cycles and is near its fatigue limit is much more likely to snap when subjected to the additional stress of extreme cold. The molecules in the steel just don't want to flex anymore. Another issue is moisture. The humidity in spring and fall can lead to surface rust on non-galvanized springs. This rust creates tiny pits in the surface of the wire, which become stress risers—points where a crack is more likely to form and propagate, leading to premature failure.

It's not just the springs. Road salt spray, especially for homes in Mississauga, Oakville, and Burlington near the QEW and the lake, is incredibly corrosive. It eats away at the bottom brackets that hold the lift cables, the bottom weather seal retainer, and the lower door sections themselves. We often find bottom brackets so rusted they are paper-thin and about to fail. Furthermore, in winter, ice can build up under the door, freezing it to the concrete. When a homeowner hits the opener button, the motor tries to rip the door free, putting a massive shock load on the entire system, which can easily snap an aging spring or strip the opener's main gear.

The Common (and Costly) Mistake: Replacing Only One Spring

The biggest mistake we see, made by homeowners trying to save a buck or by unqualified handyman services, is replacing only one spring on a two-spring system. It seems logical—one broke, so replace the one that broke. But it’s a bad, unsafe idea that costs more in the long run.

Springs on a dual-spring setup are a matched pair. They were installed at the same time, are made of the same material, and have endured the exact same number of cycles. If the left spring, with a wire size of .250, an inside diameter of 2 inches, and a length of 32 inches, broke this morning after 11,000 cycles, its partner on the right side is not far behind. It has the same amount of metal fatigue and has likely been doing double duty since its partner failed, accelerating its own demise.

More importantly, a new spring has 100% of its rated lifting power. The old spring on the other side, even if it looks fine, has lost maybe 10-15% of its tensile strength over its life. This creates a dangerous imbalance. The new spring will lift with more force than the old one. The door will go up and down crookedly, even if it's just by a fraction of an inch. This puts enormous racking stress on the door sections, hinges, and rollers, causing them to wear out faster. It also forces the opener to work harder to manage the imbalance, shortening its lifespan. A professional garage door company will always, without exception, replace springs as a pair. It’s the only correct way to do the job, ensure proper door balance for safety, and provide a full warranty on the parts and our labour.

On Site in Mississauga: How We Perform a Proper Spring Replacement

When we arrive at a job, say for a standard 16x7 insulated Steel-Craft door in a Mississauga subdivision, our process is methodical and prioritizes safety above all else. Here's the step-by-step:

1. First, we secure the door. We clamp the door to the vertical track with a pair of locking C-clamps, usually just above the third roller. This physically prevents the door from moving, even if a cable were to slip. 2. We pull the red emergency release cord to disengage the opener from the door. We then fully unplug the opener motor from the ceiling for electrical safety. 3. With the door secured, we address the springs. If there's an unbroken spring in the pair, it's still holding hundreds of pounds of torque. We use proper 24-inch steel winding bars—never screwdrivers or rebar—to carefully unwind any remaining tension, quarter-turn by quarter-turn, until the set screws on the winding cone can be safely loosened. 4. Once all tension is released, we loosen the set screws on the cable drums and unbolt the center bearing plate from the wall or spring pad. This allows us to slide the torsion bar sideways to remove the old, broken spring pair. 5. We inspect the related components. We check the nylon center bearing and the end bearings for wear; a worn-out, grooved bearing can create friction that will chafe and destroy a new spring in a fraction of its expected life. We also inspect the full length of both lift cables for any signs of fraying or corrosion. We usually replace the cables with the springs as a best practice.

### Cutting and Winding the New Springs

This is where precision is critical. Using a micrometer, we measure the wire diameter, inside diameter, and length of the old springs. We input these values, along with the door's height and weight (which we can calculate or measure), into a spring engineering app to determine the exact IPPT (Inches of Wire Per Pound of Torque) required. This ensures the new springs are perfectly matched to the door's weight for flawless balance. On our truck, we have a full stock of high-quality, oil-tempered spring wire in various gauges. We cut and assemble the correct right-hand and left-hand wind spring pair on site.

After sliding the new springs onto the bar and re-securing the center plate and end bearings, we start winding. A typical seven-foot-high door requires about 7.75 full turns, or 31 quarter-turns. An 8-foot door needs closer to 8.75 turns (35 quarter-turns). We then re-attach the cables to the bottom brackets and tension them by hand, locking the drums to the shaft. We perform a balance test by lifting the door to waist height and letting go. It must hover perfectly in place. If it drops, it needs more tension; if it flies up, it has too much. Only when the balance is perfect do we remove the clamps, reconnect the opener, and test the full system's travel limits and safety features.

The Smart Upgrade: 10,000 vs. 25,000 Cycle Springs

When we replace your springs, we always give you the option between standard 10,000-cycle springs and high-cycle 25,000-cycle (or even higher) springs. The standard ones are what the builder put in. They work, but their lifespan is finite and predictable. They are made from a Class I oil-tempered wire. High-cycle springs, however, are engineered for longevity. They are typically made from a higher grade of steel wire (often a shot-peened, Class II oil-tempered wire) and are designed with a slightly larger wire diameter or a longer length. This design reduces the stress on the steel during each cycle, dramatically extending its fatigue life.

For a small premium over the standard springs, you get a system that's built to last 15-20 years, not 5-7. For any family in a high-traffic area like Vaughan or Markham that uses their garage door as their primary entrance, this is the most logical and economical choice in the long run. The cost of a high-cycle upgrade is a fraction of what a future emergency service call and another day off work will cost. It's about paying for durability and getting the job done right for the long term. This is especially true for heavy, 2-inch thick polyurethane insulated doors (R-16+) or solid wood overlay doors that put more strain on every component. The heavier the door, the more sense a high-cycle spring makes.

When to Repair the Spring vs. Replace the Whole Door

A broken spring doesn't automatically mean you need a whole new door. In 90% of cases, a professional spring replacement is all that's needed to get another decade or more of life out of your existing door. However, a broken spring is a good opportunity to assess the health of the entire system. Sometimes, putting new springs on a failing door is a bad investment.

We recommend considering a full door replacement if we see multiple advanced-stage problems. This is about long-term value and safety, not just patching a single issue. A new door comes with all new hardware—tracks, rollers, hinges, cables, and springs—restoring the entire system to factory-new condition. It can also be a chance to upgrade the look of your home or improve its insulation with a modern, high R-value door. We will always give you an honest assessment. If the door is sound, we'll say so. If it's on its last legs, we'll show you why.

Here are the major red flags that suggest a replacement is the smarter financial choice:

• **Widespread Section Damage:** Look for deep cracks, especially around the hinge and strut locations. The top section is most vulnerable where the opener arm connects. If the steel stile is cracked, the section's integrity is compromised.
• **Delamination and Water Damage:** On a steel sandwich door, this is when the outer steel skin begins to separate from the inner insulation core. You might see bubbling or feel soft spots. This is often caused by water infiltration and cannot be effectively repaired.
• **Advanced Rust:** Surface rust can be treated, but if the bottom of the steel sections are rusting through, or if the bottom weather seal retainer has disintegrated, the door is structurally failing from the bottom up. This is common in older doors that have seen many salty GTA winters.
• **Wood Door Rot:** For wooden doors, check the bottom and the joints between panels for soft, rotting wood. Once rot sets in, especially at the bottom, the door loses its strength and becomes a safety hazard.
• **Multiple Hardware Failures:** If the spring is broken, several hinges are cracked, the rollers are shot, and the tracks are bent, you're facing a component-by-component rebuild. The cumulative cost of these small repairs can quickly approach a significant fraction of a new door package.
• **Obsolete or Unsafe Design:** Very old doors may lack modern safety features or may be so heavy and poorly constructed that they present an ongoing risk.

The Dangers of an Unbalanced Door

Whether it's from a broken spring, a single-spring replacement, or just old, tired springs that have lost their lift, running an unbalanced door is one of the most damaging things you can do to your garage door system. A balanced door should feel light, allowing you to lift it with one hand when the opener is disconnected. It should stay put when you let go at the halfway point. An unbalanced door, however, is dead weight.

When you force the opener to lift this weight, you are asking a 1/2 or 3/4 horsepower motor to do the work of a weightlifter. It puts incredible strain on every part of the opener. The first thing to go is usually the main drive gear inside the motor housing. It's a nylon or plastic gear designed to be a failure point to protect the motor, but replacing it is still a significant repair. If the gear doesn't strip, the motor itself can burn out. We've seen opener logic boards fry from the excessive amp draw. The force also yanks on the top section of the door, eventually cracking the panel or ripping the opener bracket right off. It causes the chain or belt to stretch and sag, and it accelerates wear on the rollers and hinges. A quality LiftMaster or Chamberlain belt drive opener (like an 87504-267) should operate with a quiet hum, not the groaning and shaking you see when it’s trying to deadlift 300 pounds. The health and longevity of your entire system begins and ends with the springs. Getting them sized and tensioned correctly is the most important repair you can make.

A garage door system is exactly that—a system. Every part has to work in harmony. A properly balanced door with fresh, correctly-sized torsion springs puts almost zero strain on your electric opener, allowing it to last for 15-20 years. An imbalanced door will destroy that same opener in a matter of months. Getting the springs right isn't just a repair; it's a restoration of the entire system's balance and function.