The diagnostic on this badge is the lowest first-visit figure we publish, and the reason is what is on the van rather than what the hour is worth. Pump, valve, element, lid switch and fan motor are stocked for this make rather than ordered, so the visit that finds the problem is often the visit that fixes it.
That changes the arithmetic on an older machine considerably. On a make whose parts arrive in three weeks, keeping a twelve-year-old appliance going is an ordeal; here it is usually one visit.