2026-04-17 7 min read
If you've ever walked into your garage on a January morning and heard a loud bang. like a gunshot. there's a good chance a torsion spring just let go. It's one of the most common calls we get at Garage Door Hanover, and it's no coincidence that it happens most often during the coldest stretches of winter.
Hanover's climate is genuinely hard on mechanical components. Temperatures here regularly swing from single digits overnight to the mid-30s by afternoon. That kind of thermal cycling. metal expanding and contracting repeatedly. accelerates metal fatigue faster than in milder climates. Add in the fact that the Upper Valley sits in a humid continental climate zone, and you've got conditions that are about as rough on steel springs as anywhere in New England.
Most residential garage doors use one of two spring systems: torsion springs, which sit horizontally above the door on a metal shaft, or extension springs, which run along the horizontal tracks on either side. Both work by storing mechanical energy. when the door closes, the springs wind up under tension, then release that energy to assist lifting the heavy door.
A standard residential garage door weighs between 150 and 300 pounds. Without functional springs, your opener motor would burn out trying to lift that load alone. or the door simply wouldn't move at all.
Spring steel becomes more brittle as temperatures drop. When it's 5°F outside. which happens regularly here from December through February. the metal loses some of its flexibility. A spring that's already logged thousands of cycles (most are rated for 10,000) is much more likely to snap under that added brittleness.
The temperature swings are the other factor. Hanover sits along the Connecticut River valley, and the weather patterns here produce dramatic day-to-night temperature fluctuations, especially in the shoulder seasons. A door that goes from a cold garage overnight to afternoon sun hitting a dark steel panel can see spring hardware expand and contract by measurable amounts in a single day.
Homes in the more rural parts of town. out toward Etna or up on Hanover Center Road. tend to have less insulated garages, meaning the interior temperature tracks the outdoor temperature more closely. That makes spring failure even more likely in those properties.
One often-overlooked contributor to spring failure is inadequate lubrication. Cold temperatures thicken conventional grease and cause it to stop protecting the coils properly. If your springs haven't been lubricated with a silicone-based or lithium-based spray before winter, they're working dry under maximum stress. a recipe for premature failure.
This is something our maintenance value analysis guide covers in more depth: the small cost of preventive care versus the larger cost of emergency replacement.
Springs rarely fail without any warning. Here's what to pay attention to:
- The door feels heavier than usual. Disconnect the opener and try lifting the door manually. A properly balanced door should stay at waist height when you let go. If it crashes down or feels like you're lifting dead weight, spring tension is off. - Visible gaps or stretched coils. A broken torsion spring will have an obvious gap in the coil. Extension springs may look visibly stretched or uneven. - The opener struggles or reverses. Your opener has a force sensor. when the springs aren't doing their share of the work, the opener detects resistance and may refuse to open fully. - Squeaking or grinding sounds. Metal-on-metal noise from the spring area suggests the coils are dry and under stress. - The door closes unevenly. One side dropping faster than the other is a classic sign of an extension spring problem.
If you're noticing any of these signs, it's worth getting an inspection before you're stuck with a door that won't open on a workday morning. Our neighbors in Lebanon and White River Junction deal with the same issues. this is a regional problem tied directly to the climate.
We'll be direct here: spring replacement is not a safe DIY project. Torsion springs are under extreme tension. enough to cause serious injury if a coil releases suddenly during a repair attempt. Extension springs are somewhat more accessible, but the cable and pulley system they interact with adds complexity.
The tools required (winding bars, proper torque calibration) and the safety risks involved put this squarely in professional territory. Beyond safety, an improperly tensioned spring will either fail prematurely again or put uneven stress on your cables, tracks, and opener.
You can browse our full repair and replacement services to understand what a professional spring replacement involves, or reach out to schedule an inspection if you're already hearing warning signs.
The industry-standard life rating for most springs is 10,000 cycles. One cycle equals one open and one close. A household that uses its garage door four times a day will hit 10,000 cycles in roughly seven years. In Hanover's climate, with the thermal stress described above, that lifespan can realistically be shorter. especially if lubrication has been neglected or if the spring was undersized at installation.
High-cycle springs rated for 25,000 or 50,000 cycles are available and worth the upgrade, particularly for attached garages that are used as the primary home entry point. The price difference is modest compared to the inconvenience of a failure.
If a spring has already snapped, don't force the door. Using your opener to drag a 200-pound door with no spring assist can strip the opener's drive gear or bend the top door panel. Use the manual release cord to disconnect the opener and leave the door where it is until a technician can assess it.
For more on how to handle a sudden garage door failure safely, our post on storm season preparation has useful context about protecting your door system under stress.
Technically the door may still move with the opener if one spring breaks and a second remains intact (some systems have two torsion springs), but this puts enormous strain on the opener motor and cables. It's best to stop using the door and call for service promptly.
Most single torsion spring replacements run between $150 and $300 for parts and labor. Replacing both springs at the same time (recommended, since they age together) typically runs $250,$450 depending on spring type and cycle rating. Emergency or same-day service may carry an additional fee.
Look above the door when it's closed. If you see a horizontal metal bar with a spring coiled around a shaft, those are torsion springs. If you see springs running along the horizontal tracks on the sides of the door, those are extension springs. Both can fail, but they're replaced differently.