Tired capacitor, no app
That setup worked fine for its first fifteen or twenty years. Now the capacitor in the motor is tired, the logic board doesn't talk to a phone app, and the safety sensors - if they're even the photo-eye kind - sit lower than current standards call for. Homeowners usually notice it as a door that reverses for no reason, a remote that only works from the driveway, or a motor that hums for a second before it actually lifts.
