AC repair in Philomont.

The Purcellville weather station, 6.2 miles north-northeast, averages a July high of 86.4F and counts 30.2 days a year at or above 90F. Western Loudoun’s July 28, 2023 heat wave pushed heat indices past 110F on mesonets across the zone. In weather like that the small parts decide whether the house stays cool. Start with the diagnostic visit at $99. A capacitor is $240 to $370, a contactor $290 to $425, and a condensate drain that has clogged runs $175 to $420.

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. A heat pump is your air conditioner in July and your heat in January, so one failure can leave you uncomfortable in either season. Philomont’s low reached -2F on the morning of January 23, 2025, which is a hard test for the cold-weather side of the machine.

Propane heats another 42 percent, and in those houses the air conditioner usually shares an air handler and blower with a propane furnace. A blower wheel that has gone out of balance shows up whichever season the system is running, and replacing one is $300 to $440. The median owner home dates to 2000, and about 48 percent of homes went up since then, so many wheels, motors and coils here are in mid-life.

The electrical side takes the beating when storms roll through. Trees came down, some on wires, at Snickersville Turnpike and JEB Stuart Road in June 2016, and trees blew across the roads south of Philomont on July 16, 2024. A weak capacitor tends to give out when power returns and the system tries to start. Turn the thermostat off while the lights are out, then bring the system back once the power has held for a bit.