2026-04-05 7 min read
If you've ever heard a loud bang coming from your garage. especially on a frigid January morning. there's a good chance you've experienced a broken garage door spring. It's one of the most common garage door failures in the Lakes Region, and in Laconia's humid continental climate, springs take a real beating every single year.
This guide walks you through exactly what's happening, how to spot a failing spring before it snaps, what it costs to fix, and why this is one job you should absolutely leave to a professional.
Laconia sees some serious temperature swings. January lows regularly dip into the teens. sometimes below zero. while summer highs push into the upper 70s. That's a spread of nearly 70 degrees Fahrenheit across the year, and your garage door springs feel every degree of it.
Cold weather causes metal to contract and become more brittle, making springs more susceptible to snapping. This is exactly why so many spring failures happen during the heart of winter here in New Hampshire. not because you're unlucky, but because the physics of metal fatigue work against you when temperatures fall.
Beyond the cold, Laconia's high relative humidity. reaching 85% in January and February. contributes to rust and corrosion on spring coils. Moisture silently deteriorates metal springs; when humidity rises, rust forms quickly and erodes the steel, leading to tiny cracks that eventually cause breakage. For homeowners near Winnisquam or in lower-lying neighborhoods around Lake Opechee, this moisture exposure is even more pronounced.
Before you can understand what's wrong, it helps to know which type of spring your door uses.
Torsion springs sit on a metal shaft directly above your garage door. They wind and unwind as the door cycles, providing steady, balanced lifting support. Most newer homes in Laconia. including the colonials and cape-style homes that dominate the area. are built with torsion systems. They're more durable and provide smoother operation than the alternative.
Extension springs run along both sides of the door near the tracks, stretching as the door opens and contracting as it closes. These are common on older homes and some detached garages. If your home was built before the 1990s, there's a solid chance you have extension springs.
Knowing which type you have helps you describe the problem accurately when you schedule a service call.
Garage door springs don't usually fail without warning. Here's what to watch for:
- A loud bang from the garage. often described as a heavy object hitting the floor. even when no one is using the door. This is frequently a spring snapping, and it can happen at night when temperatures drop. - The door only lifts 3,6 inches before stopping or reversing. The opener is sensing too much resistance. - Visible gap in the coil. if you look above the door and see a gap of 2 inches or more in the torsion spring, it has snapped. - The door feels extremely heavy when lifted manually. Springs are supposed to counterbalance the door's weight (150,400 lbs); without them, you're lifting all of it. - Lopsided or jerky movement. if one side of the door rises faster than the other, one spring may be weaker or broken. - Loose or dangling cables. loose cables often accompany spring failure, even though the cables themselves may look like the culprit.
If you notice your opener straining or making unusual noises, that's also a red flag. Your opener is not designed to lift a door's full weight on its own. when springs weaken, the motor has to work much harder, accelerating wear.
This is important. Do not try to open the door manually or with the opener once you suspect a broken spring. Repeated attempts can overload the opener, bend the rail, and pull the door further out of alignment. turning a manageable repair into a much bigger job.
More importantly, do not attempt to replace the spring yourself. Garage door springs are under extreme tension. enough to cause serious injury if mishandled. This is a job for trained professionals with the right tools and calibration equipment. Garage Door Laconia's technicians see this scenario regularly and can handle it safely.
For most homeowners in the Lakes Region, professional spring replacement runs between $200 and $450 depending on the spring type, door size, and whether one or both springs need replacing.
- Torsion spring replacement: typically $200,$350 installed - Extension spring replacement: typically $150,$250 installed - Converting from extension to torsion: $400,$800, but often worth it for the smoother, safer operation
One thing worth knowing: if your door uses a two-spring torsion system, many technicians recommend replacing both springs at the same time, even if only one has broken. Installing a new spring alongside an old, worn spring creates uneven tension. the newer spring carries more of the load, accelerating wear and increasing the chance of another failure soon after. It also ensures balanced lifting and reduces strain on cables, bearings, and the opener.
For a broader look at what repair and replacement services cost in this area, our installation pricing guide has useful context.
Standard torsion springs are typically rated for 10,000 cycles. roughly 7 to 10 years for an average household. But if your garage door is your primary entry point (as it is for most Laconia homeowners with attached garages), you may be burning through cycles faster than average.
High-cycle springs rated for 20,000 or even 30,000 cycles are available at a modest upcharge and can be a smart investment. especially if you've already replaced springs once. Ask about this option when you get in touch with our team.
A few simple habits go a long way:
1. Lubricate springs twice a year. use a silicone-based or lithium grease spray, not WD-40. This reduces friction, slows corrosion, and extends spring life noticeably. 2. Do the balance test. disconnect the opener and lift the door manually to about waist height. It should stay in place. If it falls or shoots up, the springs are out of balance and need attention. 3. Don't ignore slow or jerky movement. these are early warnings, not quirks to live with.
For a full seasonal approach to keeping your system running well, check out our post on winter garage door problems in Laconia, which covers how cold weather affects every component, not just springs.
Look above your garage door when it's closed. If you see a single (or double) horizontal spring mounted on a metal shaft above the door opening, those are torsion springs. If you see springs running along the horizontal tracks on either side of the door, those are extension springs.
No. and it's important to resist the urge. Operating the door puts enormous strain on the opener motor, which isn't designed to lift the full weight of the door without spring support. You risk burning out the motor and causing further damage to cables and tracks. Keep the door closed and call for service.
For most residential doors, a professional spring replacement takes 1,2 hours. A technician will remove the broken spring, install the correct replacement sized to your door's weight, and test the door for balance before leaving.