A typical maintenance visit runs through the whole door system - springs, cables, rollers, track alignment, opener force settings, and hardware fasteners. For a house built around 1994, which is the median build year for this pocket of the service area, that often means checking parts that have never been swapped out. If the door has had zero service history, we spend extra time on the torsion spring and the roller brackets, since those carry 25-plus years of cycles on original steel. We don't post a fixed time window here because a door that's been maintained yearly moves faster through inspection than one that hasn't been touched since it was installed. What we can tell you: we come from Wilmington, about 7 miles away, and the visit covers the full door, not just the noisy part you called about.