Why You Shouldn't Replace Garage Door Springs Yourself

Where the danger comes from

A garage door feels light when it works because the springs are doing almost all the lifting. The industry standard for counterbalance systems, ANSI/DASMA 103, defines counterbalance tension as a force approximately equal to the weight of the door. The industry's sheet on adding weight to a garage door, DASMA TDS 176, puts garage doors at anywhere from 90 pounds to over 500 pounds.

So a spring on a closed door is holding energy equal to lifting that weight. Replacing it means removing that energy safely, installing a new spring, then putting the energy back in by hand. Clopay's garage door installation instructions put it plainly: springs and related hardware are under extreme tension and could cause severe injury or death if mishandled.

What goes wrong with torsion springs

Torsion springs sit on a shaft above the door. To wind or unwind one, you insert a steel winding bar into a hole in the spring's winding cone, turn it a quarter turn, hold the full spring torque on that bar, insert a second bar in the next hole, and swap, over and over. The Dura-Lift torsion spring instructions sold with retail springs describe exactly this, quarter turn by quarter turn, and still carry the warning that professional installation is highly recommended to prevent serious injury.

The failure points are easy to see once you know the process:

• The bar slips or isn't fully inserted. Clopay warns that winding bars must be good quality, snug fitting, solid steel, inserted to the full depth of the cone's holes, and held firmly at all times.
• The wrong tool. Clopay says never to use screwdrivers or any tool too large or too small, because they can break and cause serious injury, and to stand to the side of the bars while winding.
• Loosening the wrong thing. Clopay's instructions say springs, cables and bottom brackets are under extreme spring tension and not to loosen any fasteners on them. It also warns that removing a torsion spring assembly or red-colored fasteners without proper training or tools can release spring force uncontrollably and cause serious or fatal injury.
• The wrong spring or the wrong number of turns. DASMA's sheet on spring cycle life, TDS 190, lists fitting a spring that doesn't match the door, applying too many or too few turns, and winding a spring backwards as installation errors, several of them safety issues for the installer. The Dura-Lift instructions show the result: a door that moves up on its own is over-wound, and one that drifts down is under-wound.
• Guessing the spring size. DASMA publishes official spring color codes, TDS 171, but states that they are for manufacturers, should not be used by homeowners to replace springs, and that replacement should only be done by a trained door systems technician.

Extension springs and bottom brackets

Extension springs stretch along the horizontal tracks on each side. They carry the same load, and when one breaks, the pieces can fly. That's why they need a containment or safety cable running through the middle of each spring. The inspection checklist DASMA TDS 167 explains that containment helps prevent broken parts from flying dangerously around the garage, and asks inspectors to confirm extension springs are restrained by a cable. Clopay's instructions say extension spring doors must never be operated without a properly installed containment cable.

The bottom brackets at the lower corners of the door, where the lift cables attach, are also under tension on torsion systems. Clopay warns that they could spring out with dangerous force if their fasteners are loosened. DASMA TDS 167 lists warning labels near the bottom corner brackets among the labels a door should carry.

"DIY-friendly" spring systems

Some doors use systems designed to make spring replacement easier. Wayne Dalton's TorqueMaster puts the springs inside a steel tube, and the EZ-Set system sold under the Clopay, Ideal and Holmes names uses a drill-driven winder instead of winding bars. DDM Garage Doors, a parts retailer, describes both on its TorqueMaster and EZ-Set pages as designed to be safer for do-it-yourselfers than standard torsion springs.

Safer isn't the same as safe. The spring still has to carry the door's full weight, the parts are specific to each system, and DDM notes that fitting standard springs to an EZ-Set winder can damage it. If you have one of these systems and still want to do it yourself, follow the manufacturer's own instructions exactly. For most people, the saving isn't worth it.

What the injury data does and doesn't show

The U.S. Consumer Product Safety Commission tracks product-related emergency room visits through its National Electronic Injury Surveillance System. We couldn't find an official CPSC or peer-reviewed estimate that separates injuries from garage door springs from other garage door injuries, so this page doesn't quote one. What is documented is the severity of the hazard: the CPSC's garage door safety sheet warns that a severely unbalanced door could unexpectedly crash to the floor and strike someone under it, and that doors that aren't balanced should be serviced by a professional. Every manufacturer warning quoted above names the outcome as severe injury or death.

The money side

Parts are cheap compared with the total bill, which is why DIY looks appealing. But national cost guides put a professional spring replacement at a few hundred dollars. HomeAdvisor's spring cost guide (2025 data, updated June 2026) lists an average of $250 and a typical range of $150 to $350. Against that, you'd need the right springs measured correctly, proper winding bars, and no margin for error. See spring replacement cost for what moves a quote.

What you can safely do

Plenty of useful garage door care involves no spring work at all:

1. Look, don't touch. DASMA's homeowner damage checklist, TDS 174, walks through a visual check of alignment, tracks, rollers, hinges, cables and sections, while telling you not to touch or adjust the springs or anything they're fastened to.
2. Check the balance. With the door closed, pull the emergency release and lift the door by hand. The CPSC describes a balanced door as one that stays in place when stopped partway open. If it drifts down, shoots up or feels heavy, call a technician. Steps are in how to open a garage door manually.
3. Test auto-reverse. The CPSC recommends laying a 2x4 flat on the floor in the door's path and checking that the door reverses when it touches it. If it doesn't, disconnect the opener until it's fixed. See sensor repair.
4. Lubricate as the manufacturer says. DASMA TDS 190 notes that regular greasing or lubrication of springs, as required in the manufacturer's instructions, helps maximize spring life.
5. Keep the door closed when you can. TDS 190 also says doors in climates with extreme heat or cold should be kept closed where possible, which helps the springs last longer.
6. Don't add weight. TDS 176 advises against hanging things from the door or track or adding trim, because extra weight can unbalance the door and break springs.
7. Replace remote and backup batteries, clean the photo eyes and swap worn weatherseal. None of these involve tension. Our maintenance guide has a full checklist.

What to ask a technician

• Is my door on torsion or extension springs, and do the extension springs have safety cables?
• What size and cycle rating are you installing, and do they match my door's weight?
• Will you check the balance and the auto-reverse after the repair?
• Do the cables, drums or bottom brackets show wear I should know about?
• What warranty covers the springs and the labor?

When you're ready, garage door spring repair explains how a local garage door technician handles the job, and choosing a technician covers what to look for.