2026-08-23 8 min read
In our years serving San Ramon, we've seen this problem again and again: homeowners assume all garage door springs work the same way. Extension springs and torsion springs fail differently, cost differently to fix, and require different safety precautions. Understanding which type you have and when it needs attention can save you money and keep your family safe.
Extension springs sit above your garage door tracks on both sides. They stretch as the door opens, storing energy like a rubber band pulled tight. When one snaps, you'll hear a loud bang and your door won't open smoothly from the garage button. Torsion springs, by contrast, sit horizontally above the door opening and twist to lift weight. The difference matters for cost, timing, and whether you should attempt a repair yourself (spoiler: you shouldn't, on either type).
Extension springs typically last 7 to 9 years with normal use. The coils gradually weaken from constant stretching and relaxing. Rust accelerates failure, especially in the coastal microclimates we see across the San Ramon valley. A snapped spring won't hold tension anymore. Your garage door becomes suddenly heavy and dangerous.
Here's the crucial part: a broken extension spring doesn't always stop your door dead. Sometimes it limps along unevenly, putting strain on your garage door opener motor. That opener wasn't designed to lift the full weight of the door alone. Pushing it to compensate can burn out the motor in weeks, turning a spring repair into an opener replacement.
Extension springs cost less to replace than torsion springs. A typical extension spring replacement runs $150 to $300 per spring, while torsion springs often range from $200 to $400 each. Most residential doors have one torsion spring or two extension springs.
The repair decision hinges on one fact: if one extension spring fails, the other isn't far behind. Both experience the same wear over the same timeline. Professional shops typically recommend replacing both at once, even if only one snapped. This prevents a second failure three months later. With torsion springs, replacement is already a paired job since most doors need one quality spring rated for the full door weight.
If you're unsure which type you have, our guide to how garage door springs work explains the mechanical difference clearly.
**Need garage door springs in San Ramon today?** Call (925) 441-7049 for same-day service across the area.
Repair isn't really an option for broken springs. Springs don't mend. Once snapped, they must be replaced. The only decision is timing and whether you replace one or both.
You should replace extension springs immediately if one breaks. Driving with a broken spring risks your safety and your opener's longevity. If both springs are the same age and you want to avoid a second breakdown soon, replace both at the same appointment. Same-day scheduling is possible when you call early.
Preventive replacement also makes sense. If your springs are over eight years old and you're noticing slower door movement or slight binding, get a free estimate before one fails unexpectedly. A proactive replacement costs roughly the same as emergency repair but lets you schedule at your convenience rather than at 7 a.m. on a Saturday.
Our post on spring replacement costs shows why the expense is lower than homeowners expect.
Extension springs hold tremendous tension. A single spring can store 100+ pounds of force in its coils. If a spring slips during removal, it can cause serious injury. The same applies to torsion springs, which wind even tighter. Professional technicians have specialized tools, safety cables, and years of handling this tension safely.
We've treated DIY attempts that ended with broken fingers, gashes, and worse. The cost of a proper professional repair is far less than an emergency room visit or permanent injury. When you contact us for a same-day estimate, you're choosing protection as much as convenience.
Whether your extension spring snapped last night or you've noticed wear developing, Garage Door San Ramon responds to calls across the area, including Danville, Walnut Creek, and surrounding neighborhoods. We stock common spring sizes and can often complete replacement on the same day you call.
Don't wait for the second spring to fail. One failure is a warning that the other is wearing out. Call (925) 441-7049 now to schedule your free estimate and get a timeline for replacement.
Your garage door is one of the heaviest moving parts of your home. Treating spring repair as an emergency, not a convenience, keeps your family safe and your budget intact.
What causes extension springs to snap suddenly? Rust weakens the coil metal, reducing its flexibility. Corrosion combined with daily opening and closing cycles causes metal fatigue. Eventually the spring loses tensile strength and breaks under normal door weight, often without warning.
Can I still use my garage door if one extension spring is broken? Technically yes, but not safely. The remaining spring and your opener motor must handle the imbalance. This strains the motor and creates uneven door movement. Stop using it and call for repair the same day to avoid opener failure.
How much does extension spring replacement cost in San Ramon? Typical cost ranges from $150 to $300 per spring including labor. Replacing both springs when one fails costs roughly $300 to $600 total. Compare this to an opener replacement, which runs $400 to $800, if you delay repair.
Should I replace both extension springs at the same time? Yes. If one failed, the other is near the end of its lifespan. Replacing both prevents a second emergency visit within months and gives you consistent door balance and opener performance.
How long do extension springs last? Most last 7 to 9 years with normal residential use. Coastal humidity and salt air can shorten lifespan to 5 to 7 years. Regular maintenance and lubrication add years to spring life.