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
Heat pump and furnace repair in Broad Run, ZIP 20137: electric and propane, not oil burners. Priced from the book first.
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 Broad Run
Of the 660 owner homes the Census counts in ZIP 20137, just over half heat with electricity, close to three in ten with propane and about one in seven with oil. It finds none on utility gas. On propane, the usual first suspects are a dirty flame sensor, cleaned for $95 to $180, and a worn igniter, $240 to $410 to replace. A heat pump leans on its defrost control, reversing valve and backup strips. An oil burner is outside what we repair.
At Warrenton 3 SE, January runs a daytime high near 42 and a night low near 25, and about 98 nights a year fall to freezing or below. Heating degree days outnumber cooling ones by more than four to one, and Fauquier County sizes heating systems to a 17 degree design night. Nights near that figure are where a tired control board, $550 to $1,180, gives out.
Two winters stand out. NWS put the January 22 to 24, 2016 blizzard at 24 to 36 inches across Northern Fauquier, and an ice storm that February 14 and 15 left 0.2 to 0.3 inch. A heat pump’s outdoor coil buried in snow or glazed with ice can’t pull heat from the air, and the strips carry the house at electric prices. A condensing propane furnace vents through plastic pipes in an outside wall, and a drift over them trips its safety.
Late January 2026 put Extreme Cold Warnings on the Northern Fauquier zone for January 27, 30 and 31. A furnace that gets through the first of those nights and quits on the second was already weak. Where propane runs a furnace, a water heater or a dryer, a working carbon monoxide alarm matters; Fauquier County Fire Rescue takes alarm requests through a form on its Public Education page.
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
ZIP 20137 as a whole: every Broad Run address. About one home in six of them is on the Prince William County side.
What you’d notice
A heat pump melts its own frost in a defrost cycle. Thin frost that comes and goes is normal. A solid block that stays all day, or a house that stays cold while the unit runs, means the defrost control or a sensor isn’t doing its job. The diagnostic is $99.
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.
Prince William County Fire and Rescue says to have a qualified technician inspect the heating system and chimneys every year, to make sure nothing blocks the fumes from venting out of the house. Source.
Prince William County Fire and Rescue lists furnaces and water heaters among the household sources of carbon monoxide, and says to put a CO alarm outside each sleeping area and on every level of the home and to test it 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.
Here the answer splits three ways, and so do the parts: an igniter and flame sensor for propane, a defrost control and strips for a heat pump. If your heat is oil, say so on the first call, since we don’t repair oil burners.
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.
The draft inducer motor on my furnace was failing. They were able to get out same day to look at it. Ordered parts and got a new one installed quickly. The technicians were on time, responsive, and well equipped. Fairly priced too. I have nothing but good things to say.
Where we work
Next door to Broad Run: The Plains, Haymarket, Gainesville, Marshall and Warrenton.
Questions
Start with the thermostat’s mode and batteries, then the breaker and the filter. On propane, read the tank gauge, since an empty tank looks like a dead furnace. If your furnace has vent pipes through the wall, make sure snow or leaves haven’t covered them. If all that checks out, book the visit.
A repair doesn’t. A replacement can: Fauquier County wants a permit for any fuel-fired appliance, so a propane furnace swap takes one even in the same spot, and Prince William County asks the same for a gas or propane furnace like for like.
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 Broad Run 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.