GarageDoorProHQ
Guide

Why You Should Not Replace a Garage Door Spring Yourself

Updated August 11, 2026 · 5 min read · Researched in-house by GarageDoorProHQ

Part of our guide to Garage Door Repair Cost in 2026.

Short answer

No. A wound torsion spring on a standard double garage door holds roughly 200–300 pounds of stored force, released through winding bars that will swing violently if mishandled. The saving over a professional replacement is about $100–$250 of labour. This page does not explain how to do it, on purpose.

What the stored energy actually is

A torsion spring does not simply hold a door up. It is wound under tension so that it counterbalances the door’s entire weight — 150 pounds for a typical insulated single, well over 300 for a double. That energy is held in a coil of hardened steel on a bar above your head, and it stays there whether the door is open, closed, or already broken.

Releasing it is done with winding bars inserted into the spring cone, turned in a controlled sequence. If a bar slips, is the wrong size, or is substituted with a screwdriver, the spring unwinds against whatever is holding it. Hand and forearm fractures are the common outcome. Head injuries are the serious one.

Even a spring that has already snapped is not safe. The remaining coil holds residual tension, and the second spring on a two-spring door is still fully wound.

Anatomy of a torsion-spring garage doorFront view of a garage door opening. A horizontal steel shaft runs above the door carrying two coiled torsion springs, with a cable drum at each end. A lift cable runs from each drum down to the bottom bracket of the door. The door itself is four hinged sections running in a vertical track on each side.1234567
Where the load actually travels: the springs carry the door’s weight, the drums convert that into cable pull, and the cables lift from the bottom bracket. Every expensive failure on this page happens somewhere on this drawing.

What you would actually save

A torsion spring is a $40–$90 part. A professional pair replacement costs $250–$550 fitted. Buying the springs and fitting them yourself saves roughly $100–$250 in labour — assuming you already own correctly sized winding bars, vice grips and a wind-up chart for your door, and assuming you get the wind count right first time.

Get the wind count wrong and the door is unbalanced, which transfers load onto the opener and shortens the life of a $300–$700 unit. Order the wrong wire size, inside diameter or length — four measurements, all easy to get wrong from a photograph — and the door is out of service until the right part arrives.

What to do instead

Leave the door closed and stop using the opener. With a spring gone, the opener is attempting to lift the full weight of the door on its own, which is how one failure becomes two.

If the door is open and a vehicle is under it, do not lower it by hand. Clamp the track below the bottom roller with locking pliers on both sides so it cannot travel, move the car out, and leave the door where it is until a technician arrives.

Then get two quotes for a pair replacement rather than one spring, and ask for the cycle rating in writing. Where the state licenses the trade — California, Florida and Arizona — ask for the licence number and check it on the state register yourself.

The jobs that are genuinely fine to do yourself

Plenty of garage door maintenance carries no stored-energy risk at all. Cleaning and realigning the photo-eye sensors near the floor. Replacing remote batteries. Wiping the tracks out — tracks are cleaned, not greased. Lubricating hinges, rollers and the spring coil itself with a garage-door-specific lubricant, which is the single maintenance job that most extends component life.

Testing the balance is also safe and worth doing twice a year: pull the release cord, lift the door by hand to waist height and let go. It should stay put. If it slides or slams, the springs need attention — from someone else.

Balanced: with the opener disconnected, a door lifted to waist height stays put. 1 Too little tension: with the opener disconnected, a door lifted to waist height slides shut. 2 Too much tension: with the opener disconnected, a door lifted to waist height pulls up. 3
The free diagnostic, and the one that tells a spring fault from an opener fault. Pull the release cord, lift the door to waist height by hand, and let go.

Terms used on this page

Frequently asked questions

Can I replace a garage door spring myself?

You should not. A wound torsion spring holds 200–300 pounds of stored force on a typical double door, released through winding bars that cause serious hand, arm and head injuries when mishandled. The saving is about $100–$250 of labour.

Is a broken garage door spring still dangerous?

Yes. A snapped coil retains residual tension, and on a two-spring door the second spring is still fully wound. Treat the whole assembly as loaded until a technician has released it.

What should I do while I wait for a garage door repair?

Leave the door closed and stop using the opener, which is otherwise lifting the door’s full weight alone. If the door is open, clamp the track below the bottom roller on both sides before moving a vehicle out, and leave the door up.

Which garage door repairs are safe to do myself?

Cleaning and realigning photo-eye sensors, replacing remote batteries, wiping out tracks, lubricating hinges and rollers, and testing the door balance. Anything involving springs, cables or the opener’s internals is not.

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Figures are national 2026 estimates researched in-house and are not quotes. Local labour rates, door size and access all move the price. GarageDoorProHQ does not endorse, recommend, certify or guarantee any contractor — see our editorial guidelines.