Furnace and heating repair in Delaplane.

The Census finds no natural gas heat in ZIP 20144. About 54 percent of owner homes heat with propane from a tank on the property, about 30 percent with electricity, a few with wood. A propane furnace fails much like any gas furnace: a dirty flame sensor that lets the burners light and drop out, a cracked igniter, an inducer that can’t prove its draft. One check comes first: if the burners won’t light at all, read the tank gauge. A dry tank looks just like a broken furnace from indoors.

The season runs long. NOAA’s 1991 to 2020 normals for the station outside Warrenton put the median first frost near November 1 and the last near April 9, with about 13 days a year that never thaw. Fauquier County sizes heating for a 17 degree day. On February 1, 2026, the weather station listed as Delaplane, a couple of miles south of the village, logged a zero wind chill at the end of a late January Arctic outbreak. A furnace that’s been limping usually quits in a week like that.

Height matters too. Mount Weather, on the Blue Ridge crest ten miles north at 1,659 feet, averages about 5,300 heating degree days to the Warrenton station’s 4,700, roughly 13 percent more heat over a winter than the valley around the village at 449 feet. The higher a house sits toward Sky Meadows and the ridge, the closer it runs to the Mount Weather figure.

Snow and wind bring their own calls. A high-efficiency furnace breathes through two white plastic pipes out a side wall, and a drift like the two to three feet NOAA estimated for the January 2016 blizzard shuts it down until they’re dug out. Wind takes the electricity the igniter and blower need: Hurricane Sandy blocked forty northern Fauquier roads with fallen trees and lines on October 29, 2012, just as the heat came on.