Open 24/7 for emergencies
The diagnostic visit is $99, and a flame sensor cleaned is $95 to $180 from our published price book.
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Ashburn furnaces and heat pumps repaired, gas or propane, in Brambleton, Broadlands and Belmont too, though not oil burners.
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 Ashburn
Ashburn’s heating and cooling service calls lean toward winter more than any other town’s. And most Ashburn heat is gas: more than four in five owner homes burn it, and in Broadlands and Belmont it’s about nine in ten. So the January call here is usually a furnace that won’t light, lights and drops out, or runs and runs without ever warming the top floor.
How old that furnace is depends on the street. Around Ashburn Farm and Ashburn Village the typical owner home was built in 1998, so most first furnaces are long gone. Broadlands’ median house is from 2004 and Belmont’s from 2005, so a builder’s original still heating one of those is about twenty. In Brambleton and Loudoun Valley Estates the originals are in their early to mid teens, old enough for the draft fan motor or the circuit board to start acting up, and still worth fixing when the rest is sound.
Ashburn Volunteer Fire and Rescue’s carbon monoxide page says what a furnace tech would: the risk climbs when winter temperatures drop and heating systems run for hours. It wants the heating system and the water heater serviced yearly by a qualified technician, vents and flues kept clear of debris, and CO alarm batteries checked or changed every six months. On a high-efficiency model those vents are the two plastic pipes leaving the side or the roof; check them after a snow.
About four in ten Ashburn homes are townhouses, more than half in Loudoun Valley Estates and Moorefield, where the furnace often lives in the attic or a top-floor closet. About a third of Moorefield owners heat with electricity, which there means a heat pump with backup strips. Goose Creek Village is the one corner with real propane, about one owner in ten, and we repair propane furnaces the same as natural gas ones. Oil is close to absent, about three owner homes in a thousand, and oil burners are work we leave to oil heat companies.
Neighborhood by neighborhood
Census figures for each place, and what that usually means for the heat. Median year built and heat count owner-occupied homes only.
| Place | Median home built | Most homes are | Heated with | What the heat usually is |
|---|---|---|---|---|
| Ashburn | 1998 | single-family houses, about 4 in 10 | gas, about 8 in 10 | 1980s and 90s houses, most on their second furnace. |
| Brambleton | 2011 | townhouses, about 5 in 10 | gas, about 8 in 10 | Townhouse furnaces in closets and attics. |
| Broadlands | 2004 | single-family houses, about 6 in 10 | gas, about 9 in 10 | Gas furnaces near 20 years old, many still original. |
| Loudoun Valley Estates | 2013 | townhouses, about 6 in 10 | gas, about 8 in 10 | Townhouse furnaces in closets and attics. |
| Belmont | 2005 | single-family houses, about 6 in 10 | gas, about 9 in 10 | Gas furnaces near 20 years old, many still original. |
| Moorefield | 2015 | townhouses, about 6 in 10 | gas, about 7 in 10 | Townhouse furnaces in closets and attics. |
| One Loudoun | 2015 | townhouses, about 4 in 10 | gas, about 7 in 10 | Townhouse furnaces in closets and attics. |
| University Center | 1996 | condo and apartment buildings, about 4 in 10 | gas, about 8 in 10 | Condo and apartment buildings: gas or electric, in compact closet units. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
What you’d notice
High-efficiency furnaces produce water, and when the furnace sits in an attic, that drain line or the small pump that lifts the water can freeze in a deep cold spell. With nowhere for the water to go, the furnace locks itself out. Thawing and insulating the line usually fixes it.
The burners fire and go out a few seconds later, over and over. That’s usually a dirty flame sensor, and cleaning it takes about ten minutes.
No glow, no flame. A cracked igniter is the usual part, and on a high-efficiency furnace a clogged condensate line can stop it cold too.
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.
In Ashburn it’s nearly always natural gas, now and then propane in Goose Creek Village, and almost never oil, which we don’t service. Asking first means the right parts ride along and nobody drives out to a job they can’t do.
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.
I called swifpro and they sent Steven K out. He found out what the issue with our system and he had the right part with him and got our furnace working again! Thank you!
Questions
Not for a repair. A replacement is permit work: Ashburn has no town government, so Loudoun County issues it, and a gas furnace needs one even like for like. Since October 2025, a swap that keeps the BTUs and the location skips plan review.
Usually, for the small parts. A furnace from around 2011 is about fifteen, young enough that cleaning the flame sensor ($95 to $180) or a new igniter ($240 to $410) makes sense. If it needs a $670 to $2,400 blower motor or a $550 to $1,180 control board, we’ll set the price of a new furnace beside it so you can weigh the two.
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 Ashburn 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.