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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Boiler, furnace and heat pump repair in McLean and Tysons, 22101 and 22102, on gas or propane, not oil burners. Every repair is priced before it 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 McLean
McLean is where we see boilers most. Hot-water heat is a regular part of our McLean heating work, far more than anywhere else we go. A hot-water boiler warms water and a circulator pump sends it out to baseboard or radiators, often split into zones with a valve or a pump for each floor. When the boiler fires and one floor stays cold, the trouble is usually that zone’s valve, pump or thermostat, not the boiler.
Most of the rest burn gas in a furnace. About three in four owner homes in 22101 heat with gas, and close to four in ten homes there went up in the 1950s and 60s, so the furnace sits in the basement, often venting up a chimney it shares with the water heater. Swapping either one changes how the other vents, and Fairfax County wants a permit and a chimney vent certification for it, even like for like.
The biggest houses split the heat: with nine rooms or more in the median 22101 home, a basement furnace for the main floors and a heat pump or second furnace in the attic is a common pairing. Walk every thermostat before you call; the cold floor tells us which unit to open. Our McLean heating write-up goes further into boilers and zones.
In 22102 the heat follows the buildings. Owner homes there are about half gas and more than four in ten electric, and in a Tysons tower electric usually means a closet heat pump with electric strips behind it; strips doing the work in mild weather mean the heat pump has quit carrying the load. About one McLean owner home in a hundred still burns oil. Oil burners aren’t ours to fix, but a gas boiler or a heat pump to replace one is ours to price.
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 |
|---|---|---|---|---|
| McLean | 1977 | single-family houses, about 8 in 10 | gas, about 7 in 10 | Gas furnaces in older houses, often sharing a chimney with the water heater. |
| Tysons | 1985 | condo and apartment buildings, about 7 in 10 | electricity, about 5 in 10 | Condo and apartment buildings: electric heat or small closet units. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
ZIPs 22101 and 22102 as a whole: every McLean address, Tysons included.
What you’d notice
If the boiler is firing and one floor’s baseboard or radiators stay cool, look at that zone. A zone valve whose motor has burned out, or a circulator pump that has seized, leaves one floor cold while the rest is fine. Both are repairs, not a new boiler.
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.
Virginia’s boiler safety law leaves out boilers in private homes and in apartment houses of fewer than four apartments, so a house boiler gets no state inspection. Ask whether the tech tests the relief valve and checks the venting and expansion tank.
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.
Definitely recommend this company! Steven came out was able to quickly diagnose the issue with our heating system and explain the next steps to fixing the issues.
Where we work
Next door to McLean: Dunn Loring, Vienna, Falls Church, Arlington and Great Falls.
Questions
Yes: gas hot-water boilers and what’s piped to them, the circulators, zone valves and expansion tanks, plus the indirect tank if the boiler makes your hot water too. Not oil burners. It starts with the $99 diagnostic visit, and the repair is priced before we start.
No. Virginia’s rules let emergency replacement work begin first, with the permit applied for no later than the next working day. In McLean that permit is Fairfax County’s, with a chimney vent certification for a gas boiler.
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 McLean 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.