Open 24/7 for emergencies
The diagnostic visit is $99, and a run capacitor replaced is $240 to $370 from our published price book.
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AC and heat pump repair in Fairfax Station, 22039, for big 1980s and 90s houses that often run two systems. Priced from our book before work starts.
5.0 stars across 1,132 reviews
One of our HVAC technicians beside an outdoor unit at a Northern Virginia home, the vans at the curb.
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 our AC repair page. The diagnostic visit is $99, and the common parts ride on the truck, so most of these get fixed on the first visit.
Run capacitor replaced
$240 to $370
Contactor replaced
$290 to $425
Condensate drain cleared
$175 to $420
Refrigerant topped up
$190 to $740
Blower wheel pulled and cleaned
$300 to $440
Refrigerant leak found and repaired
$1,850 to $2,700
or $31/mo at 0% APR for 60 months
Repair diagnostic visit
$99
Monthly figures: 60mo @ 0% APR on each starting price, the whole price financed, on approved credit. Longer plans lower the payment and cost more in total. The lender sets the final terms. How financing works
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 the cooling and heating maintenance visits are part of the membership.
What’s different in Fairfax Station
About 9 in 10 homes in 22039 have four bedrooms or more, and about 8 in 10 were built from 1980 to 1999. In a house that big, one system rarely carries every floor. The usual arrangement is a furnace or air handler in the basement for the lower floors and a second unit up in the attic for the bedrooms, each with its own outdoor condenser.
The attic unit is the one that stains ceilings. All summer its coil drips water into a drain line, with a secondary pan under the unit as the backup. When the line clogs and the pan fills, a float switch should shut the system off; if there isn’t one, or it sticks, the first sign is a brown ring on a bedroom ceiling. Clearing the drain is $175 to $420.
What sits outside depends on the fuel. In Crosspointe, where about 8 in 10 owner homes heat with gas, it’s mostly an air conditioner paired with a furnace. In the Fairfax Station Census place gas and electric heat run close to even, and an all-electric house cools with a heat pump that also heats it from November to March, so a weak compressor in August is a heating problem waiting for the first frost.
If the house has a bonus room over the garage, that’s usually the room that never cools. It sits at the far end of the upstairs ductwork, with outside air on three sides and a hot garage underneath. More refrigerant won’t fix it. A balanced duct run, or a small ductless unit of its own, usually does, and the HVAC estimator prices a ductless head before anyone comes out.
Neighborhood by neighborhood
Census figures for each place, and what that usually means for the air conditioning. Median year built and heat count owner-occupied homes only.
| Place | Median home built | Most homes are | Heated with | What the cooling usually is |
|---|---|---|---|---|
| Fairfax Station | 1982 | single-family houses, about 9 in 10 | gas, about 5 in 10 | 1980s and 90s houses, most on their second or third system. |
| South Run | 1988 | single-family houses, nearly all | gas, about 9 in 10 | 1980s and 90s houses, most on their second or third system. |
| Crosspointe | 1993 | single-family houses, nearly all | gas, about 8 in 10 | 1980s and 90s houses, most on their second or third system. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
ZIP 22039 as a whole: every Fairfax Station address. The Fairfax Station Census place in the table also takes in streets with Fairfax mail.
What you’d notice
With the upstairs system in the attic, that’s almost always the condensate drain backing up and the pan under the air handler running over. Turn the upstairs system off at its thermostat and call; it’s a small repair before it’s a drywall job.
Usually the outdoor unit has stopped running. A hum with no fan turning is almost always the run capacitor; silence while the thermostat calls is usually the contactor.
That’s an airflow problem far more often than a refrigerant problem: a clogged filter, a matted coil, or a blower wheel packed with dust.
Choosing who fixes it
Questions worth asking anybody who comes out, us included.
In a two-system house the other unit is the same age and has had the same summers. Ask whether the tech will check its attic drain and outdoor unit while on site, and what that adds, before the visit ends.
A company that prints what a capacitor or a contactor costs has already told you the number. One that won’t say until the tech is in your driveway hasn’t.
A healthy system drops the air somewhere around 16 to 22 degrees across the indoor coil. Low refrigerant means a leak, and topping it up every summer is the expensive way to find that out.
Some repairs aren’t worth doing on a 20-year-old system. The good answer shows you the repair price and the replacement price side by side and lets you pick.
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.
Alex was very professional and the 2 technicians Oscar, and Derek was fast and efficient. They replace my A/C unit within the next day
Where we work
Next door to Fairfax Station: Burke, Clifton, Springfield, Fairfax and Annandale.
Questions
Yes. The tech goes up through the attic hatch or the pull-down stairs, so clear a path and tell us where the access is when you book. Most attic repairs are the drain, the blower or a capacitor, and each one is priced from the book first: a run capacitor is $240 to $370.
Get both numbers. A leak repair runs $1,850 to $2,700, and a system that old was most likely built for R-22, which isn’t manufactured anymore, so the refrigerant itself is scarce. The HVAC estimator gives the replacement range for just the one system, so you can weigh them side by side.
The diagnostic visit is $99. The common repairs: a run capacitor $240 to $370, a contactor $290 to $425, a condensate drain cleared $175 to $420, refrigerant topped up $190 to $740. A refrigerant leak repair runs $1,850 to $2,700.
Fix the cheap parts on almost anything. Think twice about a big repair on a system over 15 years old, and about any leak on an R-22 system. The HVAC estimator prices a new system in about a minute, so you can put the two numbers side by side.
Ready when you are
Call, or send the form at the top. The tech prices the repair from the book before starting, and if it’s the end of the road 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 Fairfax Station 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.