AC tune-up in Philomont.

Electricity heats about 42 percent of owner homes in ZIP 20132, the Purcellville-area ZIP that Philomont’s Census figures come from, and the Census files heat pumps under electric heat. Propane heats another 42 percent, usually a furnace with an air conditioner beside it. So the outdoor unit at an electric house cools in July and heats in January. One system’s visit is $69, regularly $99, and a boiler, a heat pump or a ductless mini split qualifies as a system.

Summer here is real. The Purcellville weather station averages a July high of 86.4F and 30.2 days a year at or above 90F, and western Loudoun saw heat indices above 110F on July 28, 2023. In heat like that a system has little margin. A coil coated in grime or a drain line that has slowed is the kind of small trouble that turns an ordinary hot day into a warm house.

The median owner home in the ZIP area dates to 2000, about 28 percent of homes went up from 1980 through 1999, and about 24 percent came before 1980. A house from 2000 is old enough that the air conditioner on it may already be the second one. The write-up we leave says how the parts are wearing, so a replacement can be planned in a mild week instead of forced in a hot one.

Storms add their own work. Multiple trees blew down across roads south of Philomont on July 16, 2024, and an EF1 tornado from the remnants of Debby touched down north of Willisville, about 5.5 miles from Philomont, that August. Outdoor units sit in the open and take leaves, grass and storm debris against the coil. Whatever the visit finds comes as a written price before anybody starts, and a part that can wait is labeled that way.