Garage Door Spring Replacement: Cost, Signs, and Why It's Not a DIY Job
A broken garage-door spring is the single most common emergency a technician gets called for — and the single most dangerous repair to attempt yourself. Here's how to recognize a failed spring, what a replacement should cost, and why the pros are firm that this one isn't a DIY job.
How a garage door spring actually works
Your garage door can weigh 150 pounds or more, yet a child can lift it by hand when it's balanced. That balance comes from springs that counterbalance the door's weight. There are two systems: torsion springs, mounted on a metal shaft above the door, and extension springs, which run parallel to the horizontal tracks on each side. Both store an enormous amount of mechanical energy when the door is closed — that stored energy is exactly what makes a failure dangerous.
Signs your spring has failed
- A loud bang. A snapping torsion spring sounds like a firecracker or gunshot, often heard from inside the house.
- The door won't lift, or feels impossibly heavy. Without the spring's counterbalance, the opener can't raise the dead weight and may strain or stop.
- A visible gap in the torsion spring above the door, or an extension spring hanging loose.
- The door drops fast or slams shut instead of lowering smoothly.
- The opener runs but the door barely moves a few inches, then stops or reverses.
Why this is genuinely not a DIY job
This is the part the trade is united on. A torsion spring is wound under several hundred pounds of tension. Releasing or installing it requires properly sized winding bars and a precise technique; a slip, a worn spring, or the wrong bar can send the bar or spring flying with enough force to break bones, knock out teeth, or worse. The U.S. Consumer Product Safety Commission and garage-door industry group DASMA both treat spring and cable work as a job for trained technicians, not homeowners. Online tutorials make it look manageable — the consequences when it goes wrong are not. Please leave springs and cables to a pro.
What spring replacement typically costs
| Item | Typical range | Notes |
|---|---|---|
| Single torsion spring (parts + labor) | $200 – $350 | Most common residential repair |
| Pair of torsion springs | $300 – $500 | Replacing in pairs is standard practice |
| Extension springs (pair) | $150 – $350 | Lighter-duty doors |
| High-cycle upgrade | +$50 – $150 | Lasts roughly twice as long |
These are general national ranges; your contractor gives an exact quote before any work begins. Door size, spring type, and emergency timing all move the number.
Why technicians replace springs in pairs
On a two-spring door, both springs have endured the same number of open-and-close cycles, so when one breaks the other is usually close behind. Replacing only the failed spring often means a second service call — and a second service fee — within months. Replacing both at once is standard practice and typically the better value, but ask your technician to explain the recommendation for your specific door.
How long should a new spring last?
Springs are rated in cycles — one open plus one close equals one cycle. A standard spring is often rated around 10,000 cycles, which can mean roughly seven to twelve years for an average household, less for a busy family that runs the door many times a day. High-cycle springs cost a little more up front but can roughly double that lifespan, which is worth asking about if your door sees heavy use.
The bottom line
A broken spring is a same-day fix for a trained technician and an unnecessary risk for a homeowner. If you heard the bang or your door won't lift, don't force it with the opener — call a pro who has the bars, the replacement spring, and the experience to do it safely.
This guide is general information for educational purposes only — not professional repair or safety advice. Garage door springs and cables are under extreme tension and can cause serious injury; spring, cable, and track work should be left to a trained technician. Prices are general national estimates that vary by region, door, and contractor, and change over time. Confirm specifics with a licensed garage-door professional before acting.