Why did my garage door spring break?

Springs are wear parts, not forever parts. The good news is that most of what shortens their life is preventable, so the next spring can last longer than the last one. Here is why they fail.

Why garage door springs break

A torsion spring stores energy every time the door goes up and releases it on the way down. That flex slowly fatigues the steel until a coil cracks and the spring lets go, usually with a loud bang. The main reasons it happens:

• Cycle wear. Every full open and close is one cycle. A family that runs the door six to eight times a day burns through a 10,000 cycle spring in roughly four to five years, not ten.
• Age and metal fatigue. Even a low use door loses spring strength over time. The steel gets brittle and eventually fails on an ordinary morning.
• Rust and corrosion. Moisture pits the spring and eats the protective coating. Rust adds friction between coils and creates weak spots that crack first.
• Cold temperatures. Steel gets more brittle as it gets colder. That is why so many springs in Colorado snap on the first hard freeze or a single digit morning.
• Poor balance and dry parts. A door that is out of balance or running on dry, gummed up rollers forces the spring to work harder on every cycle.

Why so many springs break in Colorado winters

Cold is the trigger that finishes off a tired spring. The metal contracts and turns brittle, and a spring that was already near the end of its cycle life cannot take the added stress. Add a heavy snow load or a door that is partly frozen to the slab, and the spring is fighting even more weight.

This is why our phones ring most on the coldest mornings of the year along the Front Range. The cold did not wear the spring out by itself, but it is what pushed an already worn spring over the edge. If your door is sluggish in winter, read our notes on a garage door that struggles in cold weather before the spring goes.

How to make the next spring last longer

You cannot stop a spring from aging, but you can keep it from failing early.

1. Lubricate the springs and hardware a few times a year. A light coat of garage door lube cuts friction and slows rust. Skip WD-40, which is a degreaser, not a lubricant.
2. Get an annual tune-up. A tech checks balance, tightens hardware, and spots a tiring spring before it strands you.
3. Ask for coated or high cycle springs. Galvanized or coated springs resist rust, and a 20,000 or 30,000 cycle spring can double or triple the lifespan for a small upcharge.
4. Keep the door balanced. If the door feels heavy by hand or the opener strains, get the balance checked. An unbalanced door wears the spring fast.

What it costs and what to expect

Most torsion spring replacements run about $200 to $500 with parts and labor, depending on the spring size and whether you do one spring or both. A high cycle upgrade adds a little to that but stretches the interval between repairs. When you replace a broken spring, it is worth asking the tech to check the cables and bearings at the same time, since they wear on the same timeline. Our garage door spring replacement cost breakdown shows what moves the price. Catching a tiring spring at a tune-up, before it snaps on a cold morning, is always cheaper than an emergency call with your car trapped inside. It also spares you the safety risk of a door that drops without warning.

When to call a pro

Once a spring breaks, the door is unsafe to run and the spring is not a DIY repair, because a wound torsion spring stores enough energy to cause serious injury. Call a tech, and unplug the opener so nobody runs the door against the dead weight.

Our crews in Denver, Lakewood, and across the Front Range carry common spring sizes on the truck, so most replacements are same-day. We match the new spring to your door, replace it, and rebalance everything so the opener is not overworked. If you have a double door, ask about doing both springs at once and consider a high cycle upgrade. Call our 24/7 line at (303) 937-4477.