Furnace tune-ups in Fairfax.
A furnace tune-up in Fairfax is $69 a system, regularly $99. Most Fairfax homeowners heat with gas, so the burners and safeties come first.
- Priced per system, in writing
- Gas and propane furnaces
- Dedicated HVAC team
Book your furnace tune-up
Gas heat in Fairfax, from 1960s basements to condo closets.
About 7 in 10 homeowners inside the City of Fairfax heat with gas, and the typical owner’s house there was built in 1966. The furnace in a house that age usually stands in the basement or a utility room beside the gas water heater, and the two often vent up one masonry chimney. That’s why the safeties matter so much here: among them are the switches that shut the burners off when the exhaust isn’t leaving the way it should, and a tune-up runs the furnace until each one has had to do its job.
On the county side the furnaces are younger, and more of them are high-efficiency. Fair Lakes, Fair Oaks and Navy went up mostly from the late 1980s on, and plenty of those houses are on their second furnace, one that vents out the side in white plastic pipe and makes water as it burns. Run through a full cycle, a slow condensate drain on one of those shows up as a pressure switch that trips. Better found in October than on a January night.
Kings Park West is different again: close to half its homeowners heat with electricity, which there usually means a heat pump rather than a furnace. Gas or heat pump, the tune-up is $69 a system, regularly $99; on a heat pump in the fall, it’s the heating side the tech runs and reads.
In the condo buildings of Merrifield and Fair Oaks, the heat is often a compact gas furnace in a hall closet, and that closet tends to fill up with the vacuum and the holiday boxes. Fairfax County Fire and Rescue asks for three feet between anything that burns and the furnace, which is hard to keep in a closet. The day the tech comes is a good day to clear it out.
What the furnaces look like across Fairfax.
Census figures for the owner-occupied homes in each place, and what that usually means for a tune-up.
| Place | Median home built | Most homes are | Heated with | What the tune-up usually meets |
|---|---|---|---|---|
| Fair Oaks | 1995 | condo and apartment buildings, about 5 in 10 | gas, about 6 in 10 | Condo buildings: compact gas furnaces in closets. |
| City of Fairfax | 1966 | single-family houses, about 5 in 10 | gas, about 7 in 10 | Gas furnaces in older houses, often on a chimney shared with the water heater. |
| Fairfax Station | 1982 | single-family houses, about 9 in 10 | gas, about 5 in 10 | 1980s and 90s houses, most on their second gas furnace. |
| Kings Park West | 1976 | single-family houses, about 7 in 10 | gas, about 5 in 10 | Gas furnaces in older houses, often on a chimney shared with the water heater. |
| Merrifield | 1990 | condo and apartment buildings, about 6 in 10 | gas, about 6 in 10 | Condo buildings: compact gas furnaces in closets. |
| Fair Lakes | 1998 | townhouses, about 3 in 10 | gas, about 7 in 10 | 1980s and 90s houses, most on their second gas furnace. |
| Long Branch | 1968 | single-family houses, about 9 in 10 | gas, about 7 in 10 | Gas furnaces in older houses, often on a chimney shared with the water heater. |
| Mantua | 1968 | single-family houses, about 7 in 10 | gas, about 7 in 10 | Gas furnaces in older houses, often on a chimney shared with the water heater. |
Fairfax houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey, owner-occupied homes unless it says otherwise.
The City of Fairfax
- Median home built1966 Census
- Built before 1980about 7 in 10 Census
- Built since 2000about 2 in 10 Census
- Most homes aresingle-family houses, about 5 in 10 Census
- Heated withgas, about 7 in 10 Census
- Rentedabout 3 in 10 Census
- Houses this age often vent the furnace and the water heater up one chimney, and the safeties a tune-up checks include the switch that shuts a furnace down when its venting isn’t right.
- Most homes here heat with gas, so gas pressure is the first reading a tune-up takes.
The Fairfax County side
Most of the Fairfax Station Census place, in the table, has Fairfax mail, so it counts here.
What a furnace tune-up costs in Fairfax.
$69 for one furnace, regularly $99, anywhere we work. The tech checks the gas pressure, the temperature rise, the safeties and the sequence of operation, which is the order the furnace lights, heats and shuts down in. A repair it turns up gets a written price first, and you decide.
- Furnace tune-up, one system$69
- Furnace tune-up, regularly$99
- Heat pump, boiler or ductless mini split tune-up, one system$69
- Comfort+ membership, a heating maintenance visit every fall included$199 a year
It’s priced per system, so a house with a second furnace for the upstairs is two tune-ups. A heat pump, a boiler or a ductless mini split is the same $69 a system.
With Comfort+ membership, $199 a year or $20 a month covers four visits every year: a heating maintenance visit in the fall, a cooling maintenance visit in the spring, a dryer vent cleaning, and a water heater flush with a sewer camera inspection. We book each one when it’s due.
When a furnace tune-up earns its keep in Fairfax.
The furnace runs, but the air comes out lukewarm
On a gas furnace that usually points at the burners or the airflow. Temperature rise, the difference between the air going in and the air coming out, is the reading that tells which, and it’s one of the numbers a tune-up takes.
Before the first cold night
That’s the night every furnace in town gets asked to work at once. A tune-up in the fall finds a weak part while you still get to choose when it’s fixed.
You just bought the house
The home inspector ran the heat for a minute. A tune-up runs it through a full cycle with the panel off, and tells you what the last owners left you.
What the county says about furnace care in Fairfax.
Fairfax County
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.
How to pick who tunes up your furnace in Fairfax.
Questions to ask anybody who quotes you, us included.
Will they give you the readings, not just a pass?
The furnace’s rating plate lists the range its temperature rise should fall in. Ask the tech what yours read and where that sits in the range. A visit that ends without a number on it was a look, not a test.
Do they say what the tune-up checks?
Ask before anyone comes out. Gas pressure and temperature rise are readings on a meter, so a real tune-up has numbers in it, not just a look at the filter.
Will they tell you what can wait?
Some tune-ups end in a list. Ask which items are failing now, which can wait a season, and what each one costs, before you agree to any of it.
What our customers say.
I would gladly recommend them to anyone in the greater Fairfax/Alexandria area without reservation.
Swiftpro came out the same day I called when my AC was out and had it fixed in less than an hour after arriving.
Elvis Diaz did an excellent job cleaning our condo’s HVAC system. He was very knowledgeable about maintaining the unit and the price was very reasonable.
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Furnace tune-up questions from Fairfax.
When should I book a furnace tune-up in Fairfax?
September or October, before the heat runs every night. Fairfax County Fire and Rescue asks households to have gas appliances inspected every fall and the heating system checked every year. Booking early also means a repair it turns up gets fixed on a mild day.
My Fair Lakes furnace came with the house. Is a tune-up still worth it?
Yes. A furnace from the 1990s is past the fifteen to twenty years most gas furnaces run, and a tune-up tells you whether it’s safe and working right for this winter. If it turns up a repair, the price is in writing first, and you can weigh it against a replacement before you decide.
How much is a furnace tune-up in Fairfax?
$69 for one furnace, regularly $99, and the same for a heat pump, a boiler or a ductless mini split. If it turns up a repair, you get the price in writing before any work, and you decide.
Is this the Heating Check or the Clean Heat?
No. The furnace tune-up is its own visit at $69. The Heating Check and the Clean Heat deep clean, the one that takes the blower wheel out and cleans it, are separate offers with their own terms on our Clean Heat page.
Furnace tune-ups in the towns next door.
- Furnace tune-up in Oakton
- Furnace tune-up in Burke
- Furnace tune-up in Vienna
- Furnace tune-up in Annandale
- Furnace tune-up in Clifton
More from SwiftPro in Fairfax
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- AC tune-up in Fairfax
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- Dryer vent cleaning in Fairfax
- Ductless mini splits in Fairfax
- Furnace and AC replacement in Fairfax
- Furnace repair in Fairfax
- Furnace replacement in Fairfax
- Heat pump replacement in Fairfax
- Plumbing in Fairfax
- Sewer camera inspection in Fairfax
- Sump pump replacement in Fairfax
- Water heater flush in Fairfax
- Water heaters in Fairfax
Get the furnace looked at before you need it.
Call, or book online and pick a window. One furnace is $69, and anything it needs gets a written price before any work.
SwiftPro Heating, Cooling & Plumbing is a licensed, BBB Accredited (A rating), independently owned heating, cooling and plumbing company in Chantilly, serving Fairfax and the rest of Northern Virginia. Virginia contractor license #2705192276. 5.0 stars across 884 Google reviews. SwiftPro maintains a dedicated HVAC team and a dedicated plumbing team.
SwiftPro Heating, Cooling & Plumbing, 4230 Lafayette Center Dr, Suite N, Chantilly, VA 20151, (703) 997-9757. Book online, read our reviews, or see every town we serve.