Open 24/7 for emergencies
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.
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5.0 stars across 1,132 reviews
Two of our technicians in a Northern Virginia utility room, between the furnace and the water heater.
Licensed and insuredVirginia Class A contractor #2705192276
24/7 emergency serviceOften same-day, and we will tell you honestly when we can get there.
Our own HVAC installersA dedicated heating and cooling team, separate from our plumbers
Price in writing firstYou see every option priced before anything is ordered
What it costs
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’s different in Middleburg
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.
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
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.
What you’d notice
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.
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.
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.
Safety and paperwork
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.
Our Virginia Class A contractor license, 2705192276, is on the side of the van.
Choosing who fixes it
Questions worth asking anybody who comes out, us included.
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.
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.
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.
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.
Two of our crew going over a work order before the day's calls.
From our Google reviews
5.0 stars across 1,132 reviews. Read them on our reviews page.
Called in the morning for a broken furnace. The technician came out same day.
Where we work
Next door to Middleburg: Philomont, Aldie, Round Hill, Hamilton and Purcellville.
Questions
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.
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.
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. From about $71 a month at 0% APR for 60 months, the whole price financed, on approved credit.
Ready when you are
Call, or send the form at the top. 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
4230 Lafayette Center Dr N, Chantilly, VA 20151
44679 Endicott Dr, Suite 211, Ashburn, VA 20147
Virginia Class A contractor license #2705192276
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 1,132 reviews on Google, Angi, Yelp, the BBB and Facebook. SwiftPro maintains a dedicated HVAC team and a dedicated plumbing team.
From SwiftPro Heating, Cooling & Plumbing in Chantilly. Housing figures are the Census Bureau’s American Community Survey, 2020 to 2024, for each place named; permit, water and sewer facts link to each office’s own page and were checked in September and October 2026.