2026-06-20 7 min read A2Z Garage Doors
Garage door springs are the hardest working part of your system, and most homeowners don't know they exist until one fails catastrophically. The two main types are torsion springs (the coiled metal bar above your door) and extension springs (the long springs on each side). Torsion springs are stronger, safer, and last 7 to 9 years with normal use. Extension springs wear faster and carry real injury risk. Understanding which type you have, how they fail, and when to call for help could save your safety and your wallet.
Torsion springs sit horizontally above your garage door opening, wound under extreme tension. When you open the door, this spring unwinds and counterbalances the door's weight so your opener doesn't strain. A single torsion spring can handle 10,000 to 20,000 cycles (open and close counts). Most residential doors use one or two torsion springs depending on weight. See our guide on choosing the right garage door style for your home.
The physics is elegant. The spring stores energy as it winds, then releases it smoothly. This means your door moves predictably, your opener runs quieter, and the mechanism lasts longer. If you have a heavy wooden door or a commercial setup, torsion is almost always the right choice.
Here's the catch: torsion springs are under such high pressure that a snapped spring can whip loose with enough force to shatter a windshield or crack a skull. I've seen homeowners injured trying to wind a new spring without proper tools. This is not a DIY job. Ever. Check our safety features guide) to understand other protections your door should have, especially if you have kids or pets. Read about commercial garage door repair in san francisco: when to fix vs. replace.
Extension springs run vertically along each side of your door opening. As the door rises, these springs stretch and help lift it. They're cheaper to replace than torsion springs, but they wear out faster (typically 4 to 7 years) because they work harder under tension.
Extension springs often fail without warning. You'll hear a loud snap, and suddenly your door becomes 50 to 80 pounds heavier. Most modern extension springs come with safety cables running through them. If a spring breaks, the cable catches it and stops it from flying across the garage. Without those cables, a broken extension spring can cause serious injury.
If your door has extension springs and you notice uneven movement (one side higher than the other), that's a red flag. One spring may be about to fail. Call a professional for an estimate before you end up with a completely stuck door.
**Need garage door springs in San Francisco today?** Call (415) 876-5381. We cover same-day service across San Francisco and the Peninsula.
A snapped spring usually announces itself loudly. Your door may stick halfway open, or it won't open at all. But earlier warnings exist if you know what to listen for.
Listen for creaking or squeaking from above the door. Watch for the door opening slower than usual, or jerking as it rises. If your opener is running but the door barely budges, a spring is likely dead or nearly gone. Some people mistake this for an opener problem. For a quick troubleshooting guide, see our repair and diagnosis post).
Don't try to force the door open. A manual pull on a broken spring door can pinch fingers or drop the door unexpectedly. Instead, contact a repair specialist right away. In the San Francisco area, a professional can usually arrive for an assessment within hours.
Spring replacement cost in San Francisco typically ranges from $200 to $400 per spring, plus labor. A snapped torsion spring costs more to replace than an extension spring, but torsion springs last longer, so the math evens out over time.
Several factors drive the final estimate: - Spring type (torsion vs. extension) - Door weight and size, How many springs need replacement, Whether safety cables need updating, Local labor rates in San Francisco versus suburbs like Daly City or San Mateo
Garage Door San Francisco offers free estimates. We'll inspect both springs (even if only one is broken), check cable condition, and give you a transparent quote with no surprises. Schedule a free quote here) or call (415) 876-5381 for same-day pricing.
If cost is a concern, remember that delaying replacement is dangerous and expensive. A broken spring eventually damages your opener, which costs two to three times more to replace. Fix springs early.
Even if only one spring failed, consider replacing both. Here's why: springs age together. If one is dead, the other is near the end of its life. Replacing both prevents a second emergency call in three months.
Plus, two matching new springs ensure balanced door movement. Mismatched springs (old and new) can cause uneven wear on hinges, rollers, and the opener. Our services page) outlines what a full spring replacement involves.
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Broken garage door springs aren't something to ignore or delay. They affect safety, cost, and your daily routine. Whether you need a torsion or extension spring replaced, a professional inspection is the first step.
Call Garage Door San Francisco at (415) 876-5381 today. We'll diagnose the problem, provide a same-day estimate, and schedule your repair at a time that works. Don't wait for a second spring to fail.
How long do garage door springs last? Torsion springs typically last 7 to 9 years with standard residential use (about 3 to 5 cycles per day). Extension springs wear faster and usually need replacement every 4 to 7 years. Frequency of use, maintenance, and climate all affect lifespan.
Can I replace a garage door spring myself? No. Springs operate under extreme tension. Improper handling can cause serious injury or death. Always hire a licensed professional with proper equipment and insurance.
What's the difference between a snapped spring and a broken spring? They're the same thing. A snapped or broken spring means the metal has fractured and lost tension. Your door will be stuck or very difficult to open.
How much does a same-day spring replacement cost in San Francisco? Typical cost is $250 to $400 per spring including labor. Extension springs run lower; torsion springs higher. Call (415) 876-5381 for a free estimate tailored to your door.
Why is my door opening unevenly? Uneven opening usually means one spring is weaker or failing. This puts stress on hinges, rollers, and your opener. Have both springs inspected immediately by a professional.