A torsion spring holds enough stored tension to break a wrist or worse, and that doesn't change based on the size of the house or the income of the street it's on. If the spring is broken - a visible gap in the coil, the door refuses to lift, or it feels twice as heavy as it should - that's not a project for a Saturday with a socket set. Where DIY is fair game: replacing worn rollers, tightening loose track brackets, lubricating hinges, or swapping a remote battery. Given that the median home here dates to 1998, a fair number of these doors are also due for weatherseal replacement, which is a genuinely simple owner job. The line we draw is tension versus no tension - anything with a spring, a cable under load, or the opener's force settings goes on the truck, not the workbench.