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 across Sterling, from Sterling Park and Countryside to Cascades, Lowes Island and Arcola, priced from our book first.
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 Sterling
The machine outside a Sterling house changes with the neighborhood. In Countryside close to eight in ten owner homes heat with electricity, and around Sterling Park, south of Route 7, just over half do, so the outdoor unit is usually a heat pump that cools and heats. Cascades, Lowes Island, Oak Grove and Arcola go the other way, seven to nine in ten on gas: a plain air conditioner out back, wired to a furnace indoors.
Age runs on a different map. The part the Census calls Sterling, around Sterling Park, has a median owner home from 1979, where Loudoun County’s is 2003, so many of those houses are on their third or fourth system. Countryside, Cascades and Lowes Island are mostly 1980s and 90s, on their second or third. Arcola is the young end, its median home from 2017, and a compressor that new may still be under the manufacturer’s warranty, which takes that repair from $2,200 to $5,100 down to $1,900 to $2,500.
Summer here is a touch kinder than inside the Beltway. NOAA’s 1991 to 2020 normals for Dulles Airport, beside Sterling, count about 33 days a year at 90 degrees or hotter, against 40 at Reagan National, and July nights at Dulles run about five degrees cooler. Those 90-degree afternoons are when a weak run capacitor finally quits; replacing one is $240 to $370.
Around Dulles Town Center seven in ten homes are rented, so whoever books may be an owner or property manager. Tell us who approves the repair, and the price goes to them first.
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 |
|---|---|---|---|---|
| Sterling | 1979 | single-family houses, about 5 in 10 | electricity, about 5 in 10 | Mostly electric heat: heat pumps that cool in summer and heat in winter. |
| Lowes Island | 1996 | single-family houses, about 6 in 10 | gas, about 7 in 10 | Townhouse streets: condensers side by side, air handler in a closet or attic. |
| Cascades | 1996 | townhouses, about 4 in 10 | gas, about 8 in 10 | 1980s and 90s houses, most on their second or third system. |
| Sugarland Run | 1983 | single-family houses, about 6 in 10 | gas, about 5 in 10 | 1980s and 90s houses, most on their second or third system. |
| Dulles Town Center | 1998 | condo and apartment buildings, about 5 in 10 | gas, about 9 in 10 | Condo and apartment buildings: small splits and fan coils, roof or balcony condensers. |
| Arcola | 2017 | townhouses, about 5 in 10 | gas, about 8 in 10 | Townhouse streets: condensers side by side, air handler in a closet or attic. |
| Oak Grove | 2005 | townhouses, about 8 in 10 | gas, about 9 in 10 | Townhouse streets: condensers side by side, air handler in a closet or attic. |
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
A July night at Dulles usually bottoms out near 67 degrees, cool enough for a working system to pull a Sterling house down by morning. If yours wakes up as warm as it went to bed, check the filter, then have the coil and capacitor looked at; refrigerant comes last.
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.
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.
Choosing who fixes it
Questions worth asking anybody who comes out, us included.
Much of Arcola’s equipment is under ten years old, and a manufacturer’s parts coverage often runs ten years on registered equipment. A tech should read the label, look up the coverage and tell you which price applies up front.
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.
Great experience today with SwiftPro Cooling tech. After previous AC repair visit, recommended condenser coil cleaning for max ac efficiency. Finally scheduled. Same tech, same excellent experience. 100% recommend this independently owned shop.
Where we work
Next door to Sterling: Ashburn, Herndon, Reston, Great Falls and Chantilly.
Questions
No. A repair takes no permit. A replacement goes through Loudoun County, since Sterling has no town government, and the fuel decides it: a gas furnace swapped with the AC needs a gas permit, while a like-for-like electric heat pump or AC in a house or townhouse usually falls under Virginia’s exemption for equipment that burns neither gas nor oil.
More of our Sterling calls end in a full system replacement than in any other town where we work regularly. A Countryside heat pump from the early 2000s has worked every winter as well as every summer, so it carries more hours than an AC the same age. Small parts are still worth fixing; a defrost board is $450 to $1,150. A dead compressor, $2,200 to $5,100, is the point to price a new system beside the repair.
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 Sterling 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.