On a door installed around 1991, the wear you're likely seeing by now is age wear, not a manufacturing defect. Look for a torsion spring with visible gaps stretched wider on one side than the other - that's a spring nearing the end of its cycle life, not something you tension and forget. Chain-drive openers from that era tend to get loud a year or two before they fail outright, a grinding note that wasn't there before. On the door skin itself, moderate cold-climate swings mean the bottom panel is usually the first to show rust or paint failure, since it holds moisture longest after snow melt or a hard rain. If the door still moves smoothly and the panels are solid, a spring and cable replacement is a fair fix. If the bottom panel is rusted through, replacement is the better call - patching a thirty-year-old steel skin rarely holds.