March 23, 2026 · 6 min read
Garage door springs store enormous energy and have caused real, serious injuries. Here's why this is one repair that belongs to a professional, every time.
Most of what we write in this blog is meant to help you understand your garage door and know when to call for help. This article is different. It’s about the one repair we won’t walk you through, and why. Garage door spring replacement is genuinely dangerous, and the injuries that come from getting it wrong are real, not exaggerated.
A residential garage door torsion spring is a tightly wound length of steel wire, mounted on a shaft above the door, holding an enormous amount of stored energy. That stored tension is what lets a person lift a door that weighs well over a hundred pounds with one hand: the spring is doing almost all of the actual work. To install or adjust that spring, a technician has to wind it to the correct tension using specialized bars, under controlled conditions, with the door secured. There is no point in that process where the spring isn’t capable of releasing all of its stored energy at once if something slips.
Most home repairs fail safely if you make a mistake: a loose screw, a bad paint job, a wire connected wrong just stops working. A garage door spring under tension doesn’t fail safely. If it slips off a winding bar, unwinds unevenly, or the wire itself lets go, it releases that stored energy instantly, and the bar, the spring, or nearby hardware can become a projectile. This isn’t a hypothetical risk factored into a warning label out of caution: it’s the actual, documented reason garage door spring work is left to trained professionals, and why every manufacturer’s installation manual explicitly warns against untrained spring work.
Even setting aside the spring itself, a door with its springs disconnected has no counterbalance at all. If it’s not properly secured while the springs are off, the full weight of the door can drop unexpectedly, onto hands, tools, or anyone standing underneath. That’s a second, completely separate way this repair goes wrong for people who aren’t doing it every day.
There are DIY spring tutorials out there, and some of them are careful and detailed. The problem isn’t a lack of information: it’s that the margin for error is genuinely small, the tools involved (winding bars, vice grips, the right ladder positioning) matter as much as the steps, and the first time doing this task is exactly when something is most likely to go wrong. A technician who replaces springs regularly isn’t just more informed than a set of instructions: they’ve built the physical judgment for when tension feels right, which isn’t something a written guide can fully convey.
If you’ve identified a spring problem using the warning signs in our other articles (a bang, a visible gap in the coil, a door that suddenly feels much heavier), the right next step is the same regardless of how confident you feel with tools: stop using the door, use the manual release only if you need to get a car out, and call a technician. This is genuinely one of the fastest repairs for a professional to complete safely, and it’s not worth the risk of doing it any other way.
If you suspect a broken or failing spring, don’t attempt it yourself. Call ASAP Garage Door at 514-701-8612 and we’ll handle it safely. The $30 service call is waived if you go ahead with the repair.
$30 Service Call, Waived: a technician gives you a firm price before any work starts.
Call 514-701-8612