The complaint we hear most from this stretch is the opener running its full cycle but the door reversing partway, or light flashing with no clear fault code. On the 1980s-era units still in service here, that's frequently a worn drive gear slipping under load rather than a sensor problem, even though the safety-eye light is what the owner notices first. On houses built closer to the 1991 median across the wider service area, we see more circuit-board failures than gear failures - newer units fail electrically before they fail mechanically. Either way, the symptom a homeowner reports rarely points straight at the cause, which is why a phone diagnosis is a guess and a look at the unit isn't.