A door installed around 1999 was built for a specific era of hardware - galvanized torsion springs rated for a certain cycle count, steel rollers rather than the nylon ones that came standard later, and openers that are now old enough to be on their second or third remote battery but not old enough to be a chain-drive relic. On a maintenance visit we check spring tension and look for the rust bloom that shows up faster here than in drier climates, since this area sits in a mild band that still sees occasional freeze - moisture cycling in and out of coils over 25 years does real wear even without hard winters. We also check the travel limits and force settings on the opener, since those drift over time and are a common reason doors reverse or slam. One honest limit: if a spring on a door this age is original and showing stress cracks, we're not going to lubricate it and call it fixed - that's a replacement call, not a maintenance one, and we'll tell you that on site rather than patch it.