Open 24/7 for emergencies
The diagnostic visit is $99, and a flame sensor cleaned is $95 to $180 from our published price book.
Get your price in writing
Send this and the office calls or texts you back to set a time.
We’ll call or text this number about your request. By sending it you agree to our terms and privacy policy.
Rather talk now? (703) 997-9757
Furnace and heat pump repair across Aldie: Stone Ridge, Kirkpatrick Farms, Willowsford and the Route 50 village, with the price in hand before any work.
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 Aldie
Gas heats close to eight in ten owner homes in Aldie, and Stone Ridge’s association lists Washington Gas as the gas company. Since more than nine in ten homes here went up after 2000, the furnace on a call is usually the one that came with the house: about seventeen years old in a Stone Ridge house from the 2009 median, and younger in plenty of the streets around it, where the ZIP’s 2013 median puts many furnaces near a dozen years.
Those ages call for different conversations. On a furnace from the late 2010s nearly any repair is worth making, because the cabinet, the heat exchanger and the ductwork around it have most of their life left. At seventeen, a Stone Ridge furnace still deserves its small fixes, but before a blower motor or a circuit board goes in, the replacement number belongs on the same page.
The association’s utility list carries two electric companies, Dominion Energy and NOVEC, and that matters if you’re weighing a heat pump with the gas furnace as backup. Which one bills you moves the outdoor temperature where gas becomes the cheaper heat; our dual fuel guide works it out for both, along with what Washington Gas pays toward one. The federal tax credit ended with 2025, so the utility’s money is what’s left.
Changing a furnace can change the outside of the house, and two sets of rules watch that here. In Stone Ridge, a flue replaced exactly as it was needs no application, a new or changed one does, and a through-the-wall metal flue can’t go on a side you see from the street. In the old village along Route 50, the county’s historic district reviews most exterior changes before the work begins. A repair inside the cabinet touches neither.
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
ZIP 20105 as a whole: every Aldie address, inside Stone Ridge and out.
What you’d notice
In an Aldie home heated with electricity, a heat pump that leans on its electric strips through every cold snap shows up as a winter bill that jumps and air that never feels warm. That’s usually a defrost or refrigerant fault, and cheaper to chase in November than in February.
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.
The rating plate inside the door gives the year. On a furnace that came with a 2009 house, that date changes what a big repair is worth, and a tech should read it to you before quoting one.
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.
Technician Steven came out to look at our heat that was not working properly. He was extremely pleasant and knowledgeable. He went out of his way to explain the issue and our options for the repair. We felt like we were in good hands. Great customer service.
Where we work
Next door to Aldie: Haymarket, Middleburg, Ashburn, Catharpin and Chantilly.
Questions
If it’s a high-efficiency furnace, check where its two plastic pipes leave the house. Snow over the intake or the exhaust trips the pressure switch, and the furnace stops to be safe. Clear them by hand, reset the thermostat and call if it won’t relight. A condensate line that froze in a garage-level install does the same thing.
Yes, even like for like. Since October 2025 Loudoun has asked for no plans on a replacement at the same BTUs in the same spot, so a straight swap is the permit alone. In Stone Ridge the association only comes into it if the flue changes.
Less than most places we work. About one Aldie owner home in seven heats with electricity, and about one in twenty burns propane, most of it outside Stone Ridge. If yours is a heat pump, a short blast of cool air on a January morning is the defrost cycle doing its job; the backup strips running nonstop aren’t, and your power bill is where it shows.
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 Aldie 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.