Open 24/7 for emergencies
Calverton furnace repair begins with a $99 diagnostic visit. Electric heat pumps and propane furnaces do most of the heating out here.
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
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 Calverton
Zero. That’s how many owner homes the Census finds on utility gas in 20119, the Catlett ZIP area where most Calverton houses sit. Roughly half run on electricity, which in a detached house here usually means a heat pump backed by resistance coils, and about 29 percent on propane brought in by truck. So a no-heat call here tends to be a compressor losing ground to the cold, or a propane burner that quits.
The long season is winter. Warrenton 3 SE, the closest NOAA normals station at six miles west-northwest, averages a 24.8 degree January low and logs around 98 frosty nights and some 4,685 heating degree days a year. Fauquier’s building design criteria pick 17 degrees as the design night, and on anything colder a heat pump sized to that number calls its backup coils in. That station has gone well below it: 3 degrees on January 7, 2014.
Snow causes plenty of January calls. The 2016 blizzard left 25 inches lying at that station. Drifted in up to its coil, a heat pump can’t draw air, and a condensing propane furnace that vents out a side wall through two plastic pipes locks itself off once snow covers them. After a big storm, shovel clear around the outdoor unit, uncover those pipes, and clear a route to the propane tank’s gauge.
Both kinds of Calverton heat stop when the power does: the propane furnace’s igniter, controls and blower are all electric. In December 2020 freezing rain glazed Opal, in the same southern Fauquier forecast zone, with as much as half an inch, and the Arctic air of late January 2026 pushed Piedmont wind chills to between zero and ten below. Once the power’s restored, if the house stays cold, flip the furnace’s service switch and look at the breakers one time, then phone us.
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Calverton’s own ZIP, 20138, is post office boxes only, so the Census Bureau maps no area for it. These are ZIP 20119 as a whole, the Catlett ZIP area that holds nearly nine in ten of the Calverton Census place’s homes.
What you’d notice
On a damp 30 degree morning, white frost on the outdoor coil is normal, and the unit melts it off every so often, steaming as it goes. A coil locked inside solid ice, or ice piling on top from a dripping gutter, is not. Set the thermostat to emergency heat so the backup coils carry the load, and call.
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
Fauquier County Fire Rescue takes requests for help getting smoke and carbon monoxide alarms through a form on its Public Education page. 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.
When a propane furnace won’t fire, the cause can be an igniter, a flame sensor or a control board, or just a tank that’s run low. A good tech looks at the tank gauge first and sends you to your propane supplier when that’s the fault, instead of selling you a part.
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.
Elvis, my technician, was professional and quick with his repairs. He also gave me some nice tips on how to maintain my heating unit for the summer.
Questions
Probably not. Below the 17 degree night the County’s design criteria plan for, most heat pumps run without stopping and bring in the electric strips to help. Running nonstop at 45 degrees is a different story, and so is a house that won’t hold its temperature with the strips on. That’s a repair, and the diagnostic visit is $99.
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 Calverton 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.