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 Chantilly, 20151 and 20152, from our shop on Lafayette Center Drive. Priced before anyone picks up a tool.
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 Chantilly
Most of 20151 went up in the 1980s and 90s, so most houses there are on their second or third air conditioner, and it’s close to an even split between electric heat, usually a heat pump, and a gas furnace with a separate AC.
South Riding, in 20152, is younger: the median house went up in 2006, so a lot of those systems are original and pushing 20 years. A unit that old may still hold R-22, the refrigerant that stopped being made in 2020; once it leaks, topping it up stops making sense and the talk turns to repair against replace.
Nearly half the South Riding homes are townhouses, with the condensers lined up a few feet apart out back. Units that close breathe each other’s hot air, and a coil matted with grass clippings overheats sooner, so on a townhouse call the coil gets checked before anyone talks refrigerant.
In 20151, close to half the houses heat with electricity, so the outdoor unit is a heat pump working twelve months a year. It puts winter hours on the same contactor and capacitor an air conditioner only uses in summer, which is one reason those parts ride on our truck.
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 |
|---|---|---|---|---|
| South Riding | 2006 | single-family houses, about 5 in 10 | gas, about 8 in 10 | Townhouse streets: condensers side by side, air handler in a closet or attic. |
| Chantilly | 1987 | single-family houses, about 6 in 10 | gas, about 5 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.
What you’d notice
In a South Riding townhouse the air handler often sits in the attic or a top-floor closet, so a clogged condensate line shows up as a stain on the ceiling below it. A float switch that shuts the system off when the pan fills is cheap insurance; if yours tripped, that’s why the AC stopped.
Ice on the outdoor lines in July means low refrigerant or starved airflow. Shut it off to thaw and call; running it iced can take out the compressor.
A house from the 2000s often still has its first air conditioner. Anything installed before 2010 usually runs R-22, which hasn’t been made since 2020, so a leak on one is a repair-or-replace question.
Choosing who fixes it
Questions worth asking anybody who comes out, us included.
The data plate on the outdoor unit gives the year. On a 2006 system that’s the first thing to read, because it decides whether a $1,850 to $2,700 leak repair is worth doing.
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.
Arrived within an hour on a Sunday morning and provided great service.
Called SwiftPro around 5 am and their electronic system scheduled an appointment for us same day.
Edis quickly identified the problem and got the system working which will allow me to have AC while preparing to replace the 19 year old unit. He did great.
Where we work
Next door to Chantilly: Centreville, Catharpin, Herndon, Aldie and Oakton.
Questions
Depends on the repair. A capacitor ($240 to $370) or a contactor ($290 to $425) is worth replacing on a unit of any age. A refrigerant leak on an R-22 system that old usually isn’t, because the refrigerant is no longer made and the repair alone runs $1,850 to $2,700. We’ll show you both numbers.
Not for a repair. For a replacement, the permit comes from Loudoun County in 20152 instead of Fairfax County in 20151.
Both, and here it’s close to half and half. A heat pump’s outdoor unit heats as well as cools, so on a summer call we check its defrost board and reversing valve too. With a gas furnace and a separate AC, the shared part is the blower, so that gets checked either way.
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 Chantilly 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.