A door installed new in a late-90s Keller build is typically on torsion hardware from day one, with a center-mounted spring over the header rather than the two side-mounted stretch springs you'd find on an older house. That's good news for repair - torsion systems are more standardized, and parts are easier to source even 25 years later. Where we see trouble is the opener, not the door. Openers from that era are aging into failure now: worn drive gears, logic boards that no longer take a new remote code, safety sensors that have drifted out of alignment after two decades. On a double-wide door, a torsion spring rated for that width and weight has to be matched correctly - undersizing it burns out the opener motor trying to compensate. If your door is original to the house, it's old enough now that a spring failure is common, not rare, and worth checking before it snaps.