Furnace and heating repair in Delaplane.
Furnace repair in Delaplane opens with a $99 diagnostic visit. About half the homes in 20144 burn propane, and each repair is priced before work.
- Prices in writing, first
- Furnaces, heat pumps and boilers
- Dedicated HVAC team
Get your heating repair priced
No gas main in 20144: Delaplane’s heat comes off a propane tank or the power line.
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.
Delaplane houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Delaplane
ZIP 20144 as a whole: every Delaplane address.
- Median home built1986 Census
- Built before 1980about 2 in 10 Census
- Built since 2000about 3 in 10 Census
- Most homes aresingle-family houses, nearly all Census
- Heated withelectricity, about 3 in 10 Census
- Rentedabout 2 in 10 Census
- A few houses still burn heating oil. We don’t work on oil burners, but a switch to a heat pump or a gas or propane furnace is ours to price.
What furnace repair costs in Delaplane.
The same price book as the rest of our site. The diagnostic visit is $99, and the tech prices the repair before starting it.
- Flame sensor cleaned$95 to $180
- Igniter or flame sensor replaced$240 to $410
- Blower wheel pulled and cleaned$300 to $440
- Thermostat replaced$300 to $640
- Control board$550 to $1,180
- Blower motor$670 to $2,400
- Repair diagnostic visit$99
Often same-day, and we will tell you honestly when we can get there.
With Comfort+ membership, $20 a month or $199 a year, the diagnostic visit is included, any service is 15% off, and a heating maintenance visit comes every fall.
What a failing furnace in Delaplane usually does.
It quits on the days that never thaw
A high-efficiency propane furnace drains water through a small condensate line. Where it runs outside or through a cold space, it can freeze on a day that stays below 32, and the backup trips a safety switch. If yours stops in a deep freeze with propane in the tank, that line is one of the first things we check.
It smells the first time it runs
Dust burning off the heat exchanger smells for the first few minutes of the season, then stops. A gas smell is different: leave the house and call your gas company from outside.
It runs a few minutes, stops, starts again
Short cycling is usually a clogged filter, a thermostat in a bad spot, or a furnace too big for the house. The filter is the one to check yourself first.
What the county says about your heat in Delaplane.
Fauquier County
Fauquier County Fire Rescue takes requests for help getting smoke and carbon monoxide alarms through a form on its Public Education page. Source.
How to pick the best furnace repair company in Delaplane.
Questions worth asking anybody who comes out, us included.
Do they treat a propane furnace as propane, not natural gas?
Propane runs at a different gas pressure through different burner orifices, and a furnace converted from natural gas should carry a label saying so. Ask whether the tech measures the gas pressure at the valve and checks it against that label.
Will they price the part before they fix it?
Flame sensors, igniters and control boards all have a going rate. A tech who can’t tell you the number before starting is asking you to find out afterwards.
Do they look at the venting, not just the flame?
Getting the burners lit is half a heating call. Ask whether they check the flue and test for carbon monoxide while the panel’s open.
Do they know when a repair isn’t worth it?
A big repair on a furnace past 15 or 20 years deserves a replacement price next to it. A good tech puts both numbers in front of you and lets you choose.
What our customers say.
Best heating and ac company in Northern Virginia. Very honest, very thorough, great prices. Will not use any other company again and I’ve used most of them over the years.
5.0 stars across 884 Google reviews. Read them on our reviews page.
Heating repair questions from Delaplane.
The power’s back after a storm but the furnace isn’t. What should I check?
First the furnace’s breaker, then the service switch on or near the cabinet, which looks like a light switch. If both are on and the furnace stays quiet, call. Power that comes and goes can be hard on a control board, which is $550 to $1,180 if it needs replacing.
How much does furnace repair cost in Delaplane?
The diagnostic visit is $99. A flame sensor cleaned is $95 to $180; an igniter or flame sensor replaced, $240 to $410; a control board, $550 to $1,180; a blower motor, $670 to $2,400.
Should I repair it or replace it?
Fix the small parts on almost anything. Before a big repair on an old furnace, look at the replacement number: a furnace alone, keeping the air conditioner you have, runs $4,285 to $14,040 installed, and the HVAC estimator gives your number in about a minute.
Furnace repair in the towns next door.
More from SwiftPro in Delaplane
Tell us what your heat is doing.
Call, or book online and pick a window. The tech prices the repair from the book before starting, and if the furnace is at the end of its life you’ll hear that first.
SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company in Chantilly, serving Delaplane and the rest of Northern Virginia. Virginia contractor license #2705192276. 5.0 stars across 884 Google reviews. SwiftPro maintains a dedicated HVAC team and a dedicated plumbing team.
SwiftPro Heating, Cooling & Plumbing, 4230 Lafayette Center Dr, Suite N, Chantilly, VA 20151, (703) 997-9757. Book online, read our reviews, or see every town we serve.