Picture this: It’s Monday morning, you’re running late for work, the kids are in the car, and you hit the garage door opener. Instead of lifting smoothly, the door jerks halfway and stops. A loud sound before it breaks, and now the car isn’t going anywhere.
The tech arrives, takes a look, and says, “One of your springs broke. We recommend replacing both.”
Your first thought might be: “Wait — only one spring is broken. Why replace the other one too?”
It’s a fair question, and here’s the honest answer: springs work in pairs, and for balance and safety, it usually makes sense to replace both at the same time.
Let’s break down why.
Springs Work as a Team
Most garage doors have two springs — one on each side or two wound on the same bar. They’re designed to share the load of the door’s weight equally. When one breaks, the other has already carried the same number of cycles and is usually close to the end of its life too.
Balance Matters
A door with mismatched springs (one brand-new, one worn-out) won’t stay balanced. That imbalance can:
- Put extra strain on the garage door opener
- Make the door jerk or tilt as it moves
- Get stuck again soon
Safety First
A door supported by only one working spring is unsafe. Springs are under extreme tension, and if the “weaker” one snaps suddenly, the door could slam shut or jam halfway. Replacing both ensures the system is stable and reliable.
The Cost Perspective
Yes, replacing one spring is cheaper upfront. But here’s the catch: when the second one breaks (and it almost always does within months), you’ll pay for another service call, labor, and downtime. Replacing both at once is usually more cost-effective in the long run.
For a clear breakdown, check out our video: Garage Door Spring Replacement Cost in 2025: Real Prices & What Impacts Them. It explains:
- The typical cost range for spring replacement in 2025.
- Why door size, spring type, and cycle rating affect price.
- How replacing both at once can be more cost-effective than piecemeal fixes.
Pairing the honest answer here with the numbers in that video gives you the full picture — both the why and the what it costs — so you can make the smartest call for your home.
When Replacing One Might Be Okay
- Single-spring systems: Some garage doors are built with only one spring — in that case, you can only replace that one.
But here’s the catch: most modern two-spring systems are designed so both springs share the workload. And think about how many times your door cycles in a normal week:
- Leaving for work in the morning and returning at night.
- Kids heading to school and back.
- Quick runs for groceries, sports, or errands.
That’s often four to eight open-and-close cycles a day — adding up to over 1,500 cycles a year. Since both springs handle the exact same workload every time, if one has broken, the other is already worn and likely to fail soon. Replacing only one may save a little money today, but it almost guarantees another service call (and a second bill) not far down the road.
AG Smart Garage provides fast, professional garage door repair throughout the North Shore. If you're searching for trusted service in Northbrook, Deerfield, Highland Park, Glenview, Buffalo Grove, Lake Forest, Evanston, or surrounding communities, our licensed technicians are ready to help — often with same-day availability. Call (224) 306-2985 or book online.
Frequently Asked Questions
1. How long do garage door springs last?
Typically 3-7 years, or about 10,000 cycles. Heavy daily use can shorten that lifespan.
2. Can I replace just one spring to save money?
You can, but the other spring is likely close to failure — meaning you’ll probably face another repair soon.
3. Will replacing both springs make my door safer?
Yes. Replacing both springs at the same time keeps your door balanced, which reduces strain on your opener and prevents sudden, uneven door movement.
Every time your garage door cycles, both springs take on the same load. If one breaks, the other has already been through the exact same number of cycles and is usually close to failing. That’s why replacing just one often leads to another breakdown shortly after.
Doing both at once is safer and more cost-effective: it keeps the door properly balanced, protects your opener from burning out, and saves you from paying for a second repair visit. In short — you’ll have smoother operation, fewer surprises, and peace of mind knowing your door won’t fail halfway up.
4. How do I know if both springs are worn?
If one spring has snapped, the other has already gone through the exact same number of open/close cycles. That means it’s almost always near the end of its lifespan, even if it hasn’t broken yet.
The smart move is to be proactive. During every tune-up, our technicians “scale” the door — testing the balance to make sure the springs are still carrying their share of the weight. It’s one of the best preventive measures we take to catch worn springs early, before they break and put extra stress on your opener or the door itself.
5. Can I replace springs myself?
Springs are wound under extreme tension, and even experienced technicians handle them with caution. A single slip during removal or installation can cause serious injury or damage to your garage door system.
It may seem like a common DIY project, but spring replacement is one of those tasks best left to professionals who have the right tools and training.
For a closer look at why it’s not recommended, check out this video:
AG Smart Garage also provides same-day garage door installation in Northbrook — book a visit.
AG Smart Garage also provides same-day garage door repair in Highland Park — book a visit.
AG Smart Garage also provides same-day Palatine garage door repair — book a visit.
For fast garage door repair in Northfield, IL — including matched-pair spring replacement — our licensed techs come to you.