How a spring repair actually goes
A spring job follows a set sequence. The technician first confirms which spring failed and checks the door hardware. A broken torsion spring shows a clear gap in the coil above the door. A broken extension spring leaves the door heavy or stuck at the bottom.
Next comes the dangerous part done safely. The tech releases the stored tension with winding bars before touching the old spring. They remove the broken spring, slide on the correct new one, and rewind it to the right tension. Then they cycle the door by hand to test its balance.
A balanced door should hold still when stopped halfway. The tech also checks the opener force so the motor is not fighting a bad setting. Most single-spring or paired swaps finish the same day, often in under an hour or two. Use the calculator above to estimate your own job.
What really moves your price
Spring type is the first driver. Torsion springs mount on a shaft above the door and cost a bit more. Extension springs run along the tracks and cost less. Each price is quoted per spring and already includes the labor and the trip charge.
The bigger choice is one spring or two. Installers almost always advise replacing both at once. The springs wear together, so a surviving spring is near the end of its life. A second replacement means a second trip, which costs roughly the price of one more spring.
Door size and upgrades also shift the total. A double door uses heavier, longer springs, so it costs slightly more than a single. High-cycle springs last longer and add to the price. A tech may also bundle worn cables or rollers, since the door is already open and safe.
Why springs break and why safety matters
Springs are rated in cycles, not years. One cycle is one open and one close. A common spring is rated near 10,000 cycles, which is about seven years of average use. Heavy daily use burns through that life faster. High-cycle springs are built to last much longer.
Weather and wear finish the job. Cold mornings make steel brittle, so many springs snap in winter. Rust weakens the coils over time. When a spring lets go, it often makes a loud bang like a gunshot inside the garage.
Treat every spring as loaded with dangerous energy. A garage door spring stores enough force to break bones or kill. That is why the tech releases tension carefully and rebalances the door after. A balanced door and a correct opener force keep the motor and cables from early failure.
How to hire and vet the technician
Ask for a clear per-spring price up front. That price should include the labor and the trip charge with no separate service fee added on top. A tech who quotes plainly is easier to trust than one who hides the parts.
Match the spring to the door, not the other way around. The right spring size depends on the door weight and height. A good tech weighs or measures the door and picks a matching spring. The wrong size strains the opener and wears out fast.
Confirm the basics before work starts. Ask that the installer is licensed and insured for the work. Ask what warranty covers the new spring and its labor. A written warranty and proof of insurance protect you if the spring fails early.
Red flags and ways to avoid overpaying
Watch for a service call fee stacked on per-spring pricing. The per-spring price already covers labor and the trip. A large separate service charge on top double-counts the same work. Ask the tech to fold it into the spring price or drop it.
Be wary of a spring visit that turns into a sales pitch. Some crews try to upsell a whole new door or opener during a simple spring call. A broken spring rarely means the door itself is done. Get the spring fixed first and judge the rest later.
Question parts and price mismatches. Cheap builder-grade, low-cycle springs sold at a premium are a bad deal. A tech who refuses to name a per-spring price is another warning sign. Compare the quote against the calculator above before you agree.