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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 repair in Paeonian Springs, priced before anybody opens a panel. Nearly half of owner homes here heat with propane.
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 Paeonian Springs
Nearly half of the owner homes in ZIP 20129 heat with propane, about 35 percent with electricity and nearly one in five with oil, and natural gas registers at zero. We repair propane and electric heat. Oil burners are the one thing we don’t work on, so you know that before the visit. The usual propane no-heat fixes are small parts: a flame sensor cleaned at $95 to $180 or an igniter at $240 to $410.
The median owner home was built in 1997, so a furnace that came with it is nearly three decades old. That changes the math on the bigger parts. A control board at $550 to $1,180 or a blower motor at $670 to $2,400 on a furnace that age belongs next to the price of replacing it, a furnace alone at $4,285 to $14,040, and the tech lays both out before you choose. About one owner home in three went up since 2000, and a furnace there more often earns the repair.
Winter is long. The Purcellville station records a January average low of 24.5 and more than a hundred freezing nights a year. The cold outbreak of January 23 to 31, 2026 brought Extreme Cold Warnings, with the coldest nights on January 27, 30 and 31. A worn igniter or a coated sensor tends to quit when the furnace is asked to cycle hardest, which is the stretch you can least afford it.
A propane furnace still needs electricity for its blower and igniter, so storms matter. On July 15, 2024, wires and a few poles came down near Clarkes Gap Road and Hurley Lane, and the February 2010 snow left outages countywide. When the furnace is out, check your carbon monoxide alarms. Loudoun County’s fire and rescue system says to keep one outside each sleeping area and on each level, tested monthly. The diagnostic visit is $99.
What you’d notice
A burner that clicks and doesn’t catch usually means a dirty flame sensor or a worn igniter, the two least costly repairs on the list. On a night near the Purcellville station’s January average low of 24.5, don’t wait on it. Reset the thermostat once, and if nothing happens, book the visit.
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.
Short cycling is usually a clogged filter, a thermostat in a bad spot, or a furnace too big for the house. The filter is the one to check yourself first.
Safety and paperwork
Loudoun County Fire and Rescue says to have heating equipment and chimneys cleaned and inspected every year by a qualified professional, and to keep anything that can burn at least three feet from all heating equipment. Source.
In its fall clock-change reminder, Loudoun County’s fire and rescue system tells residents to check their carbon monoxide alarms, and recommends one outside each sleeping area and on each level of the home, tested 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.
Ask this before you book. A furnace from a 1997-era house may be a model whose parts take effort to track down. A tech who tells you so, and prices a replacement beside the repair, is working for you. The diagnostic is $99, and the repair gets a written price before it starts.
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 Paeonian Springs: Waterford, Hamilton, Leesburg, Lovettsville and Purcellville.
Questions
Rule out the fuel supply before anything else. An empty propane tank looks just like a dead furnace, and filling it is your supplier’s job. With fuel in the tank, a burner that clicks and won’t light usually needs the sensor cleaned at $95 to $180 or the igniter replaced at $240 to $410.
Yes. About 35 percent of owner homes here heat with electricity, which includes heat pumps, and the diagnostic is $99 for those as well as for a furnace. A heat pump leaning on its electric backup through a cold snap is a fault worth chasing early. Oil burners are the one thing we don’t repair.
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 Paeonian Springs 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.