Rooftop units work hard up here. A van parked in the Darwin sun heats up fast, and the aircon is often the only thing making it liveable. Dust from the road clogs the filters, and the humidity loads the unit with water it has to drain off the roof.
When something goes wrong, it usually shows up one of three ways. Water drips through the ceiling vent. The unit runs but blows warm. Or it trips the power on the van or the park's supply. We look at all three. Most travellers would rather have it fixed in Darwin than limp on to the next town.





