2026-04-18 7 min read
Out here in Sullivan, your garage door gets put through the wringer. Winters regularly push temperatures below zero. that's not hyperbole, that's just February in Cheshire County. Then comes mud season, then the humidity of July, then early frosts that catch you off guard by mid-October. That four-season punishment adds up, and sooner or later, your garage door lets you know it.
Before you start Googling repair companies or assuming the worst, it helps to understand what's actually going wrong. Most garage door problems fall into a handful of categories, and some of them are a lot simpler. and cheaper. to fix than you'd expect.
This is the call we hear most often. The door starts moving and then stops partway, reverses on its own, or just sits there humming. Nine times out of ten, the culprit is one of three things: a misaligned safety sensor, a worn or broken spring, or a problem with the opener's logic board.
The sensors. those little blinking lights down near the floor on both sides of the door. are notorious for getting knocked out of alignment. A stiff push with a snow shovel, a bag of fertilizer falling over, even a determined dog can bump them enough to trigger the reversal function. Try wiping the lenses clean and making sure both indicator lights are solid (not blinking) before calling anyone.
If the sensors check out, the next suspect is your torsion spring or extension springs. These are the heavy-duty coils that do the actual work of lifting the door. They're under enormous tension, and when one snaps. which it often does in the dead of winter when the metal is cold and brittle. the door becomes essentially immovable. You'll usually hear it: a loud bang like a gunshot from the garage.
Don't attempt to operate a door with a broken spring, and don't try to replace springs yourself. The stored tension in those coils is genuinely dangerous. This is a job for a pro. If you want to understand more about why springs fail during cold snaps, our post on springs and cold weather covers exactly that.
This one is usually visible. the door looks crooked, one side is lower than the other, or it scrapes and grinds when moving. Off-track doors often happen after a vehicle backs into the door (it happens more than people admit), after severe ice builds up along the bottom seal, or when a cable snaps and the unbalanced load pulls one side down.
An off-track door is a safety issue. A door that's partially off its tracks can come down fast and unpredictably. Stop using it, disconnect the opener, and call for service. Check out our emergency access guide if you need to manually open the door safely while you wait.
Sullivan's older homes. many of them Cape Cods and colonial-style houses that have been around for decades. often have garage doors that have been in place for 15 or 20 years. Age shows itself in sound before it shows itself in failure. Grinding usually means rollers or hinges need lubrication or replacement. Squealing points to dry metal-on-metal contact. Rattling often means loose hardware. bolts and nuts that vibrate loose over seasons of temperature swings.
A 20-minute lubrication job with a spray lubricant (not WD-40. use a proper garage door lubricant or white lithium grease) can eliminate most noise complaints. Hit the hinges, rollers, and the torsion spring. Skip the tracks themselves. you want them clean, not slippery.
You hear the motor, the chain or belt moves, but the door doesn't. This almost always means the trolley carriage has been disconnected. usually because someone pulled the emergency release cord (the red rope hanging from the opener rail) and forgot to re-engage it. Push the door up manually until you hear or feel it click back into the trolley, then try the opener again.
If that's not it, the drive gear inside the opener may be stripped. This is especially common on older chain-drive openers that have been running for 10+ years. Replacement gears are available, but at that age it's worth weighing repair against upgrading to a newer, quieter belt-drive unit. Our overview of garage door openers can help you compare your options.
Honesty matters here. Most common repairs are not expensive:
- Sensor realignment: Often free to diagnose, sometimes just a quick fix - Lubrication and tune-up: $75,$150 for a full service call - Cable replacement: $150,$250 depending on the cable and labor - Spring replacement (torsion): $200,$400 for a single spring, more for a double spring setup - Opener repair (gear/logic board): $150,$350 depending on parts - Panel replacement: $200,$600+ depending on the door style and whether matching panels are available
For a detailed breakdown of what affects pricing across different repairs, our garage door repair cost guide goes deeper on the numbers.
The most important piece of advice: get a written estimate before any work starts. Legitimate local companies will give you one without pressure.
If your door is more than 15,20 years old, has multiple failing components, or has panels that are warped, rusted, or cracked from years of Monadnock Region weather, the math sometimes shifts toward replacement. A new door on an old opener with worn-out hardware is a recipe for more service calls six months down the road.
Homeowners in Peterborough and Keene face the same calculus. rural New England weather just isn't gentle on exterior components. If you're putting money into a door for the third time in five years, it's worth having an honest conversation about whether you're spending more than a new installation would cost.
Sullivan Garage Doors is happy to give you a straight answer on repair vs. replace. no upselling, just an honest look at what your door actually needs. Reach out to schedule a service visit or browse our full list of services to see what we cover.
Q: My garage door reverses before it reaches the floor. What's causing that?
A: This is almost always a sensor issue or a limit adjustment problem. The safety sensors near the floor may be misaligned or have dirty lenses. check that both indicator lights are solid and not blinking. If sensors look fine, the close-limit setting on your opener may need adjustment. Most openers have a small dial or screw for this. If neither fixes it, the issue could be with the opener's logic board or a binding in the track.
Q: How long do garage door springs typically last in a New Hampshire climate?
A: Standard torsion springs are rated for around 10,000 cycles. roughly 7,10 years for a household that uses the door 3,4 times a day. Cold winters accelerate metal fatigue, so doors in Sullivan and surrounding towns often see springs fail at the lower end of that range. High-cycle springs (rated for 25,000+ cycles) cost more upfront but last significantly longer and are worth the investment.
Q: Is it safe to use my garage door if one spring has broken?
A: No. With a broken spring, the door's full weight falls on the opener and cables, which aren't designed to carry that load alone. You risk damaging the opener, snapping a cable, and potentially having the door drop suddenly. Disconnect the opener and leave the door closed until the spring is replaced by a professional.