Quick answer
Garage doors use one of two spring systems: torsion springs, which mount on a shaft above the door and twist to store energy, or extension springs, which stretch along the horizontal tracks. Both counterbalance a door that weighs 130–350 pounds, both are rated in open-close cycles (typically 10,000), and both are under extreme tension — which is why spring work should never be a DIY project.
- Torsion springs mount on a shaft above the door and twist; extension springs stretch along the side tracks.
- Standard springs are rated for about 10,000 cycles — roughly 7–10 years at four door uses a day.
- Springs do the lifting, not your opener. A 'dead' opener is often actually a broken spring.
- A wound spring stores enough energy to lift a 300-pound door — uncontrolled release causes serious injuries.
- High-cycle springs (20,000+) cost more up front but can last twice as long for busy households.
When this matters to you
Most homeowners never think about springs until one fails — usually with a bang from the garage and a door that suddenly weighs ten times what it used to. Understanding which system your door has helps you describe a problem accurately on the phone, judge whether a quote makes sense, and recognize warning signs before failure. If your door is 7–10 years old and the springs have never been replaced, you're in the window where knowing this material pays off. It also matters when buying a home: a quick look at the spring system tells you whether a major wear item is near the end of its life.
How to tell which springs you have
Stand inside the garage with the door closed and look above the door opening. If you see one or two tightly wound springs wrapped around a horizontal metal shaft, you have a torsion system — the standard on most doors installed in the last two decades. If instead you see long, slender springs stretched alongside the horizontal tracks on each side of the door, those are extension springs, common on older homes and some single-car garages. Looking is fine; touching is not. Never loosen, adjust, or unbolt anything connected to either type.
Why springs matter more than the opener
Your opener motor doesn't lift the door — the springs do. A properly balanced spring system carries nearly all of the door's weight, so the opener only guides it. That's why a door with a broken spring won't budge even with a working opener, and why running the opener against a broken spring can burn out the motor or bend the top panel. If your door suddenly feels impossibly heavy to lift by hand, or the opener strains and stops, suspect the springs first.
How it works
Torsion springs: twisting force on a shaft
A torsion spring is wound around a steel shaft mounted on the header above the door. As the door closes, cables attached to drums at each end of the shaft pull the spring tighter, storing energy as torque. When the door opens, the spring unwinds and that stored energy lifts most of the weight. Torsion systems lift smoothly, keep both sides of the door synchronized through the shaft, and contain the spring on the shaft if it breaks. Heavier or double-wide doors often use two torsion springs so the load is shared — and so one spring failing doesn't leave the door completely dead.
Extension springs: stretch and pull
Extension springs run parallel to the horizontal tracks and stretch as the door closes, then contract to help raise it. Each side works independently, so wear or a failure on one side can pull the door out of level and bind it in the tracks. Extension springs should always have safety cables threaded through them — a steel line that contains the spring if it snaps. Without one, a broken extension spring becomes a projectile. If your extension springs have no safety cables, that's worth a service call on its own, regardless of the springs' age.
Cycle ratings: how spring life is measured
Springs aren't rated in years — they're rated in cycles, one cycle being a full open and close. Standard residential springs are built for roughly 10,000 cycles. A household that uses the garage as the front door, at four to six cycles a day, burns through that in five to seven years; lighter use stretches it past ten. High-cycle springs rated for 20,000 or more cost moderately more but can double the service life. When Door Serv Pro replaces springs, we size them to your door's actual weight and ask about your usage so the cycle rating matches how your family lives.
Key terms and context
This guide is written for repair & maintenance decisions across the Four-State Area (WV, MD, VA, PA). It uses the same terminology you'll hear from technicians, estimators, and manufacturers.
The DIY attempt
Spring replacement looks deceptively simple on video: unwind, swap, rewind. In reality, a wound torsion spring stores enough energy to lift a 300-pound door, and it releases all of it instantly if a winding bar slips or the wrong set screw is loosened. Emergency rooms see broken hands, facial injuries, and worse from homeowner spring attempts every year. The parts savings are small; the downside is permanent. This is the one garage door job that genuinely belongs to trained technicians with the right winding bars, every time.
Mismatched or undersized replacement springs
Springs must match the door's weight, height, and track setup. A bargain replacement that's close-but-wrong leaves the door under- or over-balanced: the opener strains on every cycle, the door drifts open or slams shut, and the new spring wears out early. We weigh and measure the door rather than guessing from the old spring, because the old spring may have been wrong too — it's surprisingly common to find doors that have been fighting an incorrect spring for years.
Replacing one spring on a two-spring door
When one spring on a paired torsion system breaks, the other has the same age and cycle count — it's usually weeks or months from failing itself. Replacing only the broken one saves a little today and typically buys a second service call, a second trip charge, and a second stretch of a dead door soon after. There are cases where a single replacement makes sense, but on most aging pairs, doing both at once is the honest recommendation.
Proof, process & local validation
- Door Serv Pro's trained, professional technicians have replaced springs across the Four-State Area since Paul Wiese founded the company.
- Homeowners rate us 4.9 stars across more than 1,700 Google reviews — springs are the call we run most.
- Current promotion: $75 off spring replacement, and All-Pro Members save 10% on parts.
How we build this guidance
- Written with input from Door Serv Pro's trained, professional technicians, who replace springs across the Four-State Area daily.
- Door Serv Pro is a Clopay dealer, family-owned and serving WV, MD, VA, and PA.
- Licensed in all four states: WV #WV058742, VA #2705179990, MD #117359, PA #147356.
Methodology: Spring guidance reflects manufacturer specifications, professional training standards, and the spring failures Door Serv Pro technicians diagnose daily across WV, MD, VA, and PA. Exact spring sizing always requires weighing and measuring your specific door in person.
Last updated: 2026-06-11
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Common questions
How do I know if my garage door spring is broken?
The classic signs: a loud bang from the garage, a door that won't open more than a few inches, an opener that strains or stops, or a visible gap in the coil of a torsion spring above the door. The door will also feel extremely heavy if you try to lift it by hand. If you see or suspect a broken spring, stop using the door and call — Door Serv Pro answers 24/7.
Are torsion springs better than extension springs?
For most doors, yes. Torsion springs lift more smoothly, keep both sides of the door synchronized, last longer at the same cycle rating, and stay contained on their shaft if they break. Extension springs still work fine when properly installed with safety cables, but many homeowners converting an older door choose to upgrade to a torsion system when replacement time comes anyway.
How long do garage door springs last?
Standard springs are rated for about 10,000 cycles. At two to four uses a day, that's roughly seven to ten years; heavy-use households can wear them out in five. High-cycle springs rated for 20,000 or more cycles can double that. Regular lubrication and an annual professional tune-up — like the 29-point inspection in our All-Pro Membership — help springs reach their full rating.
Why shouldn't I replace a garage door spring myself?
Because a wound spring stores enough energy to lift a door weighing 130–350 pounds, and it releases all of it in an instant if a winding bar slips. Spring injuries are among the most serious in home maintenance — broken bones and facial trauma are common outcomes. Trained technicians use proper winding bars and know the correct sequence. The money saved isn't worth the risk.
How much does spring replacement cost in the Four-State Area?
Price depends on whether you have one spring or two, the door's weight, and the cycle rating you choose. Rather than quote a vague range, we give a firm price before any work starts. Door Serv Pro currently offers $75 off spring replacement, and All-Pro Members get 10% off parts plus priority scheduling — worth asking about when you call.