Open 24/7 for emergencies
The diagnostic visit is $99, and a run capacitor replaced is $240 to $370 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
AC and heat pump repair in Clifton, 20124, from the historic town to the acreage off Yates Ford Road, priced from the book before any 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 Clifton
Clifton splits by road. In the Census tract that takes in the town and the big lots on Clifton, Compton and Yates Ford Roads, about half the owner homes heat with electricity, which out here usually means a heat pump, the same outdoor box doing both jobs, July and January. Around Springstone Drive it flips. About 85 percent of owners in those 1980s subdivisions heat with natural gas, so the AC there is a cooling-only condenser feeding a coil that sits on a gas furnace.
The houses run large. Six in ten homes in 20124 have nine rooms or more, more than twice the Fairfax County share, and a house that size often splits the load between two systems, one for the main floor and one for the bedrooms or the basement. If one level goes warm while the other holds, note which thermostat is losing before you call, and we start at the outdoor unit whose fan has stopped turning.
On a heat pump the July repair and the January one are the same machine. A refrigerant leak topped up in summer is still leaking at Christmas, when the electric backup strips, the expensive way to turn electricity into heat, pick up whatever the heat pump can’t. If the data plate on yours says R-22, the refrigerant inside hasn’t been made since 2020, and that changes the math on a $1,850 to $2,700 leak repair.
Inside the Town of Clifton most houses are frame buildings from the decades around 1900, older than air conditioning by half a century, so the cooling came later: ductwork worked into an attic or a crawlspace, or ductless heads on the walls. A repair inside needs nothing from the Town. An outdoor unit in a new spot, or a line set run up an outside wall, changes the exterior, and the Town’s FAQ sends any exterior change to its Architectural Review Board for a certificate before Fairfax County will take the permit.
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Clifton mail outside the town: five- to ten-acre lots in the Occoquan watershed on Clifton, Compton and Yates Ford Roads, mostly on septic, and the 1980s subdivisions off Springstone Drive and Union Mill Road on county sewer.
ZIP 20124 as a whole, the Town included: its own homes are too few for steady Census figures.
What you’d notice
NOVEC serves nearly all of Clifton on the county’s map, and the Town’s plan says most of the town’s lines are overhead. A storm that blinks the power can finish off a run capacitor that was already weak. If the outdoor unit hums with its fan still once power is back, turn the system off at the thermostat and call, because running it that way overheats 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.
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.
Around the town about half the houses heat with the same unit that cools them. A tech who checks how the unit switches over to heat and how it defrosts, even on a July call, catches the winter problem early; one who only reads the cooling side doesn’t.
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.
Mr Lazo did a good jod, he answered all my questions and explained me the issues with my AC. Thanks Jaime.
Where we work
Next door to Clifton: Fairfax Station, Burke, Manassas, Centreville and Fairfax.
Questions
Yes. Fairfax County issues the mechanical permit and wants an A2L certification with any system on the newer refrigerants, but inside the town line the county won’t accept the application without the Town’s sign-off, and moving an outdoor unit or adding a line set on the outside of a historic house needs the Architectural Review Board’s certificate. A repair, like a contactor at $290 to $425, needs none of that.
Yes. In a house built long before central air, wall-mounted heads are often how the cooling got added, and each one drains through its own small condensate line that clogs like any other. Clearing a blocked condensate drain is $175 to $420.
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 Clifton 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.