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
Furnace and heat pump repair in Purcellville and across 20132: propane furnaces, heat pumps stuck on backup strips, 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 Purcellville
Inside the Town of Purcellville, the Census counts about half the homeowners heating with electricity, about a third with propane, and only about one in twenty with natural gas. Step outside the town limits and propane rises to close to half. So a no-heat call here is seldom the natural gas furnace common closer in. It’s usually a heat pump, or a furnace fed from a tank in the yard.
A propane furnace is built like a natural gas one, with the same igniter, flame sensor and pressure switch, but its gas valve and burner orifices are set up for propane’s higher pressure. The difference that matters on a cold night is the supply. If the tank ran dry, call your propane company before you call us, because after a run-out the system should be leak-checked before anything relights. If the tank is full and the furnace still won’t fire, that one’s ours.
Plenty of houses here pair the two: a heat pump carries most of the winter, and a propane furnace takes over on the hardest nights. When one half of that pair finally wears out, the real question is what comes next, and the paperwork differs by fuel. A propane furnace takes a Loudoun County permit even like for like; a heat pump swapped in place goes without one.
The age question splits at the town line. The town’s median owner home dates to 2001, so a furnace or heat pump that came with it is about twenty-five, the age where a big repair deserves a replacement price next to it. On the county side close to three in ten homes are older than 1980, and a house that old may have changed heat along the way, a propane furnace swapped in, or a heat pump added with the furnace kept as backup. Tell us what’s in the basement now when you call.
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: the downtown grid around Main and 21st Streets, the historic corridors along Main, 21st, 23rd and 32nd Streets and Berlin Turnpike, and the newer neighborhoods such as Village Case.
What you’d notice
On propane, read the gauge on the tank before anything else. If it’s near empty, call for a delivery first. Once it’s refilled and the supplier has checked the system, a furnace that still won’t light is a repair visit.
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
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.
We do propane and natural gas furnaces; oil burners we don’t work on. In 20132 most furnaces that burn gas burn propane, so ask whether the tech checks the gas pressure at the valve against the propane setting, not the natural gas one, because a furnace set up for the wrong fuel doesn’t burn right.
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.
Steven came by and diagnose the issue with my heat very fast. He was extremely professional and kind. I will be definitely be recommending him to other friends and family ASAP
Where we work
Next door to Purcellville: Round Hill, Hamilton, Philomont, Waterford and Lovettsville.
Questions
Only after it’s converted. Propane runs at a higher pressure, so the gas valve gets a different spring and the burners get smaller orifices, usually from a kit the manufacturer makes for that model, and the job ends with a pressure and combustion check. A furnace connected to the other fuel without that conversion is unsafe, not just inefficient.
Yes, inside the town and out. Virginia’s code lets an appliance be swapped without a permit only when it doesn’t burn gas or oil, and propane is a gas. Loudoun County issues building permits across the whole county, towns included, and since October 2025 a replacement at the same BTUs in the same spot needs no plans.
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 Purcellville 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.