What Most People Get Wrong
The common story is that the cold itself breaks the spring, like the metal just gives up from frost. That's not quite it. Steel contracts as it cools, and a torsion spring that's been under load all year loses a little flexibility with every degree it drops. In a town where most houses went up between 1938 and 1996, median around 1964, a lot of those springs are original or close to it - galvanized coils sized for doors that weighed less than what's hanging on the track now. People assume a spring that worked fine in October will keep working in January. It won't, not if it's already fatigued from thirty-plus winters of the same stress cycle. The second thing people get wrong is timing the fix to the symptom. By the time the door won't lift, the spring has usually been showing small signs for weeks - a slower close, a louder bang when it seats, a door that looks slightly crooked in the frame. In the 1960s-70s stock that makes up most of this area, those signs get written off as "the door's just old" instead of read as a spring on its way out before the hard freeze finishes it.
What to Check
Start with the cable condition on both sides of the door - on houses from the 1960s and 70s building wave, cables are often original gauge and show fraying near the bottom bracket before the spring itself fails. Pull the release and lift the door by hand with the opener disconnected. If it takes real effort or drops on its own, the spring is already doing less than half its job, cold weather or not. Look at the winding cone at the end of the torsion bar; rust bleeding out from the cone on older galvanized springs is a sign the coating gave out years ago, which speeds up fatigue in freezing temperatures. Check that the bottom brackets are still tight - houses built before double-coat zinc plating became standard tend to have brackets that loosened a little every winter for decades. None of this is a DIY spring adjustment - torsion springs under load can take a hand off, and that's not a repair to learn on your own door. What you can safely do is watch and listen, then call before the spring finishes the job on its own, usually on the coldest morning of the stretch.
What Is Going On
When a spring goes in cold weather, what's actually happened is the coil's fatigue life finally caught up with it on a day the steel had the least flexibility to spare. The spring doesn't know the calendar - it's been counting open-close cycles since whenever it was installed, and a severe-cold climate just accelerates the countdown. In a service area where 242,332 of 468,693 households own their own house, and most of that stock dates to the 1960s and 70s building boom, this isn't a rare event - it's a predictable one, concentrated in the first hard cold spell each year. We see the same pattern a few miles out too - Dover, Kenvil, Wharton, Succasunna - towns built in the same window with the same torsion hardware. One honest limitation: if your spring is an older size that's no longer a stock item, we may need a day to get the exact match rather than swap it same visit - we'd rather order the right coil than force a close-enough one onto thirty-year-old hardware.
