Guide

Why Your Spring Broke on a Cold Morning, and What Not to Do Next

Springs break on cold mornings because steel loses flexibility as it cools and the first lift of the day is the hardest. What to do in the next five minutes.

Steel gets stiffer and more brittle as it cools, and the first lift of the day asks the most of a spring that has already been cycled thousands of times. That is why so many break between six and nine in the morning. The spring did not fail because of the cold. The cold picked the moment.

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Nate C. wrote this

Do These Three Things First

Before anything else, because this is the part that hurts people.

Do not try to lift the door by hand. With the spring gone the door weighs what it actually weighs, which on a 16 by 7 insulated door is well over 200 pounds, and nothing is counterbalancing it.
Do not park under it and do not walk under it. A door held up by a stripped opener gear is held up by nothing much.
Do not keep pressing the button. Every attempt with a broken spring puts the whole weight of the door through the opener, and that is how a spring job turns into a spring and opener job.

If the car is inside and you need it, call rather than improvise. Releasing the emergency cord on a door with a broken spring does not release the door, it lets the door drop.

What Cold Actually Does To A Spring

A torsion spring is a coil of hardened steel wound tight. Every time the door opens, the coil unwinds a little and the steel flexes. Do that often enough and microscopic cracks form at the surface, which is normal, expected, and the reason springs are rated in cycles rather than years.

Cold does two things to that. Steel becomes less willing to flex as the temperature drops, so the same movement puts more stress on the same crack. And the metal contracts, which pulls slightly on flaws that were sitting quietly. Neither effect breaks a healthy spring. Both are enough to finish off one that was already most of the way there.

Arizona is a special case, because people assume cold is not the issue here. A January morning in Anthem or Cave Creek can sit in the thirties while the afternoon reaches the seventies. That daily swing of thirty or forty degrees, repeated all winter, works the steel harder than a cold climate that simply stays cold. The heat side of the swing does its own damage: a garage ceiling in July is brutal on the grease inside the coil, and a dry spring wears faster.

Why It Is Always The First Lift Of The Day

The spring has been holding the closed door all night, which is when it is under the most tension. It is at its coldest right before dawn. Then somebody presses the button and asks it to do the hardest work it does all day, from a standing start, at the worst temperature. If a spring has one cycle left in it, that is the cycle it uses.

It is usually loud. People describe it as a gunshot, a shelf collapsing, or something falling in the garage. If you heard a bang and the door will not open, you do not need to diagnose anything else.

How To Tell It Is The Spring And Not The Opener

Stand inside, look up at the bar above the door, and look at the coil.

A gap of about two inches in the middle of the coil means the spring is broken. A whole spring is a continuous coil with no gap.
The door lifts a few inches and stops, or the opener strains and gives up. That is weight, not electronics.
You can lift it by hand but it is far heavier than you remember, and it does not stay where you leave it.
Cables hanging loose off the drums at either end, which is what happens after the tension goes.

If the opener runs the whole way and the door does not move at all, that is a different fault, usually the trolley disconnected from the arm.

Why Both Springs Get Replaced

On a door with two springs, both have lifted that door the same number of times. When one goes, the other is not fine, it is next. Replacing one and leaving the other is how a customer pays a service call twice in a season, so on about 98 percent of two spring jobs both get replaced. If you want one only, that is your call and it will be done.

This is also where the high cycle option matters on a cold morning door. A builder spring rated 10,000 cycles on a door used four times a day is finished in roughly seven years. The high cycle springs fitted here are rated 25,000 to 50,000, which is 80 to 120 dollars more per spring by size, and the difference is measured in decades rather than years.

What It Costs

A broken torsion spring replaced, with the door re-balanced and tested, is 180 to 290 dollars per spring fitted, by size. There is a 35 dollar service call, the same for every customer and every city, and it comes off the price if the work goes ahead. The exact number comes on the phone before anyone is booked, and again at the door before any work starts.

Answers

Questions People Ask About This

Why do garage door springs always break in the morning?

Because the first lift of the day is the hardest work the spring does, from a cold start, after holding the closed door under full tension all night. Cold steel flexes less willingly, so a spring already near the end of its cycle life tends to fail on that first lift.

Can I still use my garage door if the spring is broken?

No. The opener would be lifting the entire weight of the door on its own, which strips the drive gear and can burn out the motor. Do not lift it by hand and do not park underneath it.

Does the cold in Arizona really break springs?

The daily swing does. A winter morning in the thirties followed by an afternoon in the seventies works the steel harder than a climate that stays cold, and the summer heat dries out the grease inside the coil.

How much is it to replace a spring that broke this morning?

180 to 290 dollars per spring fitted, by size, plus the 35 dollar service call which comes off if you go ahead. Both springs are normally replaced on a two spring door.

If You Would Rather We Just Looked At It

This is what we do all day. Every job is priced on the price list, the service call is 35 dollars and it comes off the price if the work goes ahead, and you get the exact number on the phone before anyone is booked.

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