When a Spring Goes in Cold Weather Here in Fullerton

Season by Season

Fullerton sits in a mild temperate band, so we don't get hard freezes, but we do get a real swing between a cold, damp morning and a warm afternoon, especially from late fall into early spring. That daily swing matters more than people think. A torsion spring is a coil of wound steel, and steel contracts when it's cold. On a 40-something-degree morning, a spring that's been doing its job fine for years is pulled tighter than it was wound for. Most of the houses on a Fullerton service call were built between 1938 and 2012, with the bulk going up through the 1960s and 70s. That means a lot of original or near-original torsion hardware is still out there, now 50-plus years old, and it's that older steel that feels a cold morning the most. Summer doesn't do this to a spring. It's the cold start, the first lift of the day, when the coil is tightest and the metal is least forgiving, that catches a tired spring at the wrong moment.

What Is Going On

A torsion spring doesn't fail because of one cold morning. It fails because years of cycles - thousands of openings and closings - have already worn microscopic cracks into the wire, and a cold snap is just the morning the last cycle happens. Cold steel is less elastic, so the same lift that was fine in August puts more stress on the coil in January. In a lot of the 1960s-and-70s-built houses around Fullerton, the spring on the door has never been replaced, or was replaced once a long time ago with whatever matched the original side-mounted or center-mounted hardware. That hardware wasn't built to last the life of the house. Thirty to forty thousand cycles is a normal lifespan for a torsion spring, and a door in daily use gets there faster than most owners expect. When the wire finally lets go, it's almost always on a first cold lift of the morning, not mid-afternoon.

When to Call Someone

If the spring snaps, you'll usually hear it - a loud bang from the garage, sometimes mistaken for something falling. After that, the door will feel dead heavy if you try to lift it by hand, or the opener will strain and stop partway. Don't keep hitting the remote. Running the opener against a broken spring puts the full load on the drive gear and the cables, and that turns a spring job into a spring-and-opener job. Don't try to lift the door manually to