2026-04-20 7 min read
If you pulled into your garage one morning and heard a loud bang. or worse, found the door completely immovable. there's a good chance a spring has failed. It's one of the most common service calls we receive across Dover and into nearby towns like Needham and Wellesley, and it almost always catches homeowners off guard.
Spring failures aren't random. They're the result of years of use, New England weather, and in many cases, springs that were simply undersized for the door from day one. Understanding what's happening and what to expect from a replacement puts you in a much better position when you call for service.
Your garage door. whether it's a single-car or the wide, three-car style common on Dover's larger estates. can weigh anywhere from 150 to over 300 pounds. The springs are what make that weight manageable. They store energy when the door closes and release it when you open the door, which is why the motor doesn't have to strain on every cycle.
There are two main spring systems:
- Torsion springs. mounted horizontally above the door opening, these are the standard on most modern sectional doors. They're safer and generally last longer. - Extension springs. mounted along the sides of the door tracks, more common on older or lighter doors.
If you're not sure which system you have, look above the door when it's closed. A single or double spring running along a metal rod means torsion; springs stretching along the horizontal tracks on either side are extension springs.
Springs don't always snap without warning. Here are the signals Dover homeowners should watch for:
- The door feels unusually heavy when lifted manually. A properly balanced door should feel like about 10,15 pounds in your hands. If it feels like you're lifting a truck hood, the springs are losing tension. - The door won't stay open halfway. Lift the door to waist height and let go. It should stay put. If it drifts down, the springs are worn. - Visible gaps in the torsion spring coil. Healthy coils touch each other. A gap in the coil is a spring at or near the breaking point. - The opener strains or stops mid-cycle. When springs weaken, the opener has to compensate. and that extra load burns out motors prematurely. - A loud bang from the garage. This is a broken spring. Stop using the door immediately and schedule a repair before attempting to operate it.
In the Greater Boston area, spring replacement typically runs $175 to $375 for a single-door setup, with two-door jobs ranging from $300 to $450 or more depending on spring type and door weight. Dover's large Colonials and custom-built estates often have heavier, wider doors. and heavier doors require springs with specific weight ratings, which affects the price.
A few things that influence your final cost:
- Spring type: Torsion springs cost more than extension springs but last significantly longer and are safer when they fail. - Spring cycle rating: Standard springs are rated for roughly 10,000 cycles. A 25,000-cycle spring costs more upfront but can last 15,18 years. meaning you skip one or two full replacements over the door's life. - Two springs vs. one: Most pros will recommend replacing both springs at the same time, even if only one broke. Since both springs age together, the second is likely close behind, and replacing them simultaneously saves you another service call fee. - Emergency timing: After-hours or same-day calls carry a modest premium. typically $50 to $100 more than scheduled service.
You can read more about keeping repair costs down through regular upkeep in our post on cold weather preparation for your garage door.
We'll be direct: garage door spring replacement is one of the few home repairs where the risk genuinely outweighs any savings. Springs store enormous tension. enough energy to cause serious injury or death if mishandled. Professional technicians use calibrated winding bars and safety equipment, and they inspect the full system during the replacement, not just the broken part.
If a spring breaks, disconnect your opener and leave the door where it is. Don't try to force it open manually or run the motor. doing so can burn out the opener and damage the door panels. Call a pro.
Dover averages about 47 inches of snow per year and sees below-freezing temperatures for roughly two months of winter. That freeze-thaw cycle. combined with New England's humidity in spring and summer. puts real stress on metal hardware. Springs in damp conditions can develop rust, which increases friction, reduces flexibility, and causes earlier failure.
When you're replacing springs, it's worth discussing high-cycle, rust-resistant springs with your technician. Yes, they cost more upfront. But on a home where the garage is used multiple times daily as the primary entry point. common on Dover's larger properties. higher-rated springs pay for themselves within a few years. See our full services overview to understand what a proper spring replacement inspection covers.
No. Running a garage door opener with a broken spring forces the motor to lift the full weight of the door on its own. This can burn out the motor, strip gears, and damage cables or panels. Keep the door closed and call for service.
Yes, almost always. Both springs age at the same rate. If one has failed, the other is likely near the end of its life too. Replacing both at once means one service call, one labor charge, and a balanced door from the start.
Standard springs are rated for about 10,000 cycles, which translates to roughly 7,12 years for a typical household. Dover's freeze-thaw cycles and humidity can shorten that if springs aren't lubricated annually. High-cycle springs rated at 25,000 cycles or more can last 15,20 years with basic maintenance.