Furnace and heating repair in Middleburg.
Heating repair in Middleburg begins at $99 for the diagnostic visit. Heat pumps and propane carry most homes here through about 115 freezing nights a year.
- Prices in writing, first
- Furnaces, heat pumps and boilers
- Dedicated HVAC team
Get your heating repair priced
Middleburg runs on heat pumps and propane tanks; gas lines are scarce.
Natural gas barely reaches Middleburg. Just 41 of the 927 owner homes the Census counts across 20117 burn it. Electricity heats 582, which usually means a heat pump backed by electric strips, and 187 more burn propane trucked out to their own tank. Most cold-house calls here come down to a heat pump losing ground on a hard night, or a propane burner that refuses to fire or keeps dropping its flame.
Winter here runs colder than in the suburbs to the east. Twelve miles north, at about the town’s height, the Purcellville co-op station averages 24.5 degrees on a January night, close to 115 freezing nights from late October to mid April, and about a dozen days when the high stays at freezing or below. On January 23, 2025, an unofficial station in Middleburg read 4 below early that morning, and the Arctic outbreak at the end of January 2026 drove wind chills toward 10 below on the Piedmont.
That’s when a heat pump’s backup has to work. As the outdoor air drops, a heat pump makes less heat, and below a point set at install the strips, or a propane furnace in a dual fuel setup, take over. A strip that burned out last winter goes unnoticed until the first night near 10 degrees, and Purcellville averages about five of those a year. If the house slides behind the thermostat on a night like that, have the backup checked.
A trained spotter in Middleburg measured 34 inches from the January 2016 blizzard, and in February 2010 snow heavy enough to pull down trees and lines cut power across Loudoun. Dig the heat pump out to its pad, since it can’t heat or defrost buried, and shovel the way to the propane tank for the delivery driver. Power back on but still no heat? Look at the breaker; a control board fried by the surge is $550 to $1,180.
Middleburg houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Middleburg
ZIP 20117 as a whole: every Middleburg address, the Town and the farms around it, about a tenth of the land in Fauquier County. The Census place for the Town alone has too few homes for steady figures.
- Median home built1986 Census
- Built before 1980about 5 in 10 Census
- Built since 2000about 3 in 10 Census
- Most homes aresingle-family houses, about 8 in 10 Census
- Heated withelectricity, about 6 in 10 Census
- Rentedabout 3 in 10 Census
- Electric heat here usually means a heat pump with electric strips as backup, and a heat pump stuck on those strips shows up on the electric bill.
- 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 Middleburg.
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 Middleburg usually does.
Aux heat glowing on a mild November day
That light says the electric strips behind the heat pump are running. In a single-digit cold snap that’s normal. On a mild day it usually means the outdoor unit has quit heating and the strips are doing all the work. Our $99 diagnostic visit tracks down the reason.
The heat pump blows cool air
A few minutes of cool air in winter is a defrost cycle, and that’s normal. Cool air all the time, or emergency heat running all day, is a call.
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.
What the county says about your heat in Middleburg.
Loudoun County
Loudoun County Fire and Rescue says to have heating equipment and chimneys cleaned and inspected every year by a qualified professional, and to keep anything that can burn at least three feet from all heating equipment. Source.
In its fall clock-change reminder, Loudoun County’s fire and rescue system tells residents to check their carbon monoxide alarms, and recommends one outside each sleeping area and on each level of the home, tested monthly. Source.
How to pick the best furnace repair company in Middleburg.
Questions worth asking anybody who comes out, us included.
Is the furnace tuned for propane, not natural gas?
A furnace burning propane runs a different gas pressure, and usually different burner orifices, than the same furnace on natural gas, and the label inside the door lists both. Ask the tech to read the pressure at the gas valve against the propane figure. On the wrong settings a furnace can soot up, run hot or fail to light.
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.
Called in the morning for a broken furnace. The technician came out same day.
5.0 stars across 884 Google reviews. Read them on our reviews page.
Heating repair questions from Middleburg.
Our basement took water in a storm. Can the propane furnace run?
Not if the water reached the gas valve, the burners or the control board. Leave it off and call us; a gas valve that’s been under water gets replaced, not dried out. Heavy rain does reach Middleburg’s low ground: the Goose Creek gauge at Middleburg passed its 13 foot flood stage on September 30, 2015.
How much does furnace repair cost in Middleburg?
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.
- Furnace repair in Aldie
- Furnace repair in Purcellville
- Furnace repair in Leesburg
- Furnace repair in Ashburn
- Furnace repair in Haymarket
More from SwiftPro in Middleburg
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 Middleburg 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.