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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Furnace and heat pump repair across Haymarket: the Town, Dominion Valley, Piedmont and Bull Run Mountain, with the repair priced before any work starts.
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 Haymarket
Inside the town limits, the Town names Columbia Gas of Virginia as the gas company, not Washington Gas, and gas heats about six in ten owner homes. Nearly four owners in ten use electric heat, which in a town house built around the 1995 median usually points to a heat pump with resistance strips for backup. Thirty years on, the furnace or heat pump in most of them is a replacement, not the original.
The county side is younger and leans on gas: across 20169 the median owner home dates to 2006, and gas heats close to two thirds of owner homes. The builder’s furnace in a Dominion Valley or Piedmont house is around twenty years old, the age when the small motor that clears the flue and the circuit board start wearing out. A flame sensor on that furnace is still worth cleaning. Before a blower motor at $670 to $2,400 or a board at $550 to $1,180, put the replacement beside it: a furnace alone, keeping your AC, runs $4,285 to $14,040 installed.
Up on Bull Run Mountain the fuel changes. In Bull Run Mountain Estates oil heats about four in ten homes and propane about one in eight, and across the whole ZIP about one owner home in twenty still burns oil. Propane is a delivered fuel, so on a propane house the first no-heat question is the simplest one: how full is the tank? Prince William County wants a permit to replace a gas or propane furnace even like for like.
Two utility choices shape a dual fuel setup here. The Town lists Dominion and NOVEC as its electric companies and Columbia Gas for gas, and the point where burning gas beats running the heat pump shifts with each of those rates. Our dual fuel guide runs the numbers for Columbia Gas customers on each electric company. The rebate in it comes from Washington Gas, so a Columbia Gas account can’t claim it.
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 |
|---|---|---|---|---|
| Bull Run Mountain Estates | 1978 | single-family houses, nearly all | electricity, about 4 in 10 | Little natural gas: heat pumps and propane furnaces, plus some oil heat we don’t work on. |
| Haymarket | 1995 | single-family houses, about 6 in 10 | gas, about 6 in 10 | 1980s and 90s houses, most on their second furnace. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Inside the town limits only, about one in eighteen of the owner homes with Haymarket mail. Dominion Valley, Piedmont and Bull Run Mountain Estates sit outside it, in the county.
ZIP 20169 as a whole: every Haymarket address, the Town’s homes included.
What you’d notice
On Bull Run Mountain about four owner homes in ten heat with electricity. A heat pump that runs without a break on a mild day while the backup strips carry the house is iced over, low on refrigerant or stuck out of defrost. That’s a repair visit, priced before the work starts.
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
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.
In 20169 the answer can be Columbia Gas, propane, oil or a heat pump, and each takes different parts and a different checklist. A heating company that works here asks on the phone. We ask, because we work on gas and propane furnaces and heat pumps but not oil burners, and plenty of houses on Bull Run Mountain burn oil.
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.
Excellent work by Tyler and Team. Right from pricing to performing professional installation of new Heat Pump.
Where we work
Next door to Haymarket: Gainesville, Catharpin, Broad Run, The Plains and Aldie.
Questions
Inside the Town of Haymarket, the Town’s own utility list names Columbia Gas of Virginia. On the county side, look at the bill. It matters on a furnace replacement because gas rebates belong to the utility, and our dual fuel guide figures the gas and heat pump crossover on Columbia Gas rates as well as Washington Gas’s.
Yes. Prince William County puts a gas furnace, propane included, on its always-permitted list, even like for like, while an electric furnace or a heat pump traded like for like in its old spot needs none. Inside the town limits, the Town’s Zoning Approval comes before that County permit.
No, we don’t work on oil, so a no-heat call on an oil burner goes to an oil heat company. If you’re ready to switch, a heat pump or a propane furnace in its place is ours to price.
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 Haymarket 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.