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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 in Lorton, from Laurel Hill’s original gas furnaces to Newington’s heat pumps, priced from a published 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 Lorton
Better than eight in ten Laurel Hill owners heat with gas, and the median house there went up in 2002. Plenty of those furnaces are still the originals, which puts them at twenty-some years, the age when the moving and electronic parts start giving out: the inducer motor that clears the flue before each start, the pressure switch that proves it did, the control board that runs the whole sequence. Each one fails its own way, and what the furnace does in its first minute usually says which.
Newington, on Lorton’s north edge, is the other kind of heat. Its median home dates from 1981, more than half its homes are townhouses, and close to six in ten owners heat with electricity, which here means a heat pump with electric strips in the indoor unit to help on the coldest mornings and during defrost. When the strips are carrying the house all day, the heat pump itself has quit, and the electric bill is usually how people find out.
The Lorton Census place in the middle is about a quarter condos and apartments, where the heat is often a compact furnace or air handler squeezed into a utility closet with just enough room to pull the filter. Over a third of its homes are rented, so if you rent, call the owner first and then us; the repair is priced from the book for whoever pays it.
When an original Laurel Hill furnace does reach the end, the replacement is permitted work: a county permit comes with every gas furnace change, even an identical one, and so does a certified vent. That’s also the moment to choose between another standard furnace on the existing metal flue and a high-efficiency model piped through the wall in plastic, with a condensate drain of its own, which changes what happens to the water heater sharing that flue.
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 |
|---|---|---|---|---|
| Lorton | 2001 | single-family houses, about 4 in 10 | gas, about 7 in 10 | Gas furnaces near 20 years old, many still original. |
| Newington | 1981 | townhouses, about 6 in 10 | electricity, about 6 in 10 | Mostly electric heat, usually heat pumps with backup strips. |
| Laurel Hill | 2002 | single-family houses, about 4 in 10 | gas, about 8 in 10 | Gas furnaces near 20 years old, many still original. |
| Mason Neck | 1973 | single-family houses, nearly all | electricity, about 6 in 10 | Mostly electric heat, usually heat pumps with backup strips. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
ZIP 22079 as a whole: every Lorton address. Most of Newington, in the table, has Springfield mail.
What you’d notice
In a Newington townhouse on a heat pump, an electric bill that leaps in a cold month while the house still feels fine usually means the backup strips are doing the heat pump’s job. On a mild day with the heat on, look at the outdoor unit: if its fan isn’t turning, call.
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
Fairfax County Fire and Rescue says to have the heating system cleaned and checked by a professional every year, and to keep anything that burns at least three feet from the furnace and the water heater. Source.
Fairfax County Fire and Rescue names a faulty gas furnace or water heater as a carbon monoxide source, says to have gas appliances inspected every fall, and to put a CO alarm on every floor. 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 a gas Laurel Hill house the furnace and the water heater can share one metal flue. Swap in a high-efficiency furnace that exhausts through plastic pipe and the water heater ends up as the only thing on a flue built for both, which can keep it from drafting. The installer should check that before calling the job done.
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 returned to SwiftPro for services to add safety devices for water heating system. Thank you Moises for doing a superb job! Very happy with SwiftPro services once again! Cheers!
Where we work
Next door to Lorton: Fort Belvoir, Springfield, Woodbridge, Fairfax Station and Burke.
Questions
Nobody can give you a date, but a furnace that went in with a 2002 house is in the years when replacement starts to make sense. Small repairs still pay on it: an igniter or flame sensor replaced is $240 to $410. A control board at $550 to $1,180 or a blower motor at $670 to $2,400 is the point to put a replacement price beside the repair.
No. Emergency heat shuts the heat pump out and runs the electric strips alone, which costs a lot more per hour. It’s for a heat pump that has broken down, not for a cold night. If you’ve needed it in a Newington townhouse this winter, the heat pump needs a look.
Yes, anywhere in 22079. The Census counts only a sliver of Lorton owners on propane, about three in a hundred, but if you’re one of them, say so when you book so the tech comes ready for it.
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 Lorton 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.