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 Warrenton, from the Historic District out to New Baltimore and Vint Hill, at the same prices on either side of the town line.
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 Warrenton
Nearly three in ten homes inside the Town of Warrenton went up before 1960, long before central air, so on an older house the outdoor unit sits wherever an installer found room for it decades later. In the Historic District, where it goes next isn’t only your call. The Town’s 2022 design guidelines call a ground unit on the front of a historic building inappropriate, want rooftop equipment kept out of sight from the street, and ask for refrigerant lines on an outside wall to be painted or covered to match it.
None of that touches a repair. The Town’s permit list says repairs made with replacement parts need no permit, and neither does swapping a heat pump or air conditioning condensing unit for the same type in the same spot. A unit moving somewhere new, or an upgrade that changes the wiring or the ductwork, takes one. In the Historic District even a same-spot swap is outside work on paper: the Town wants a Certificate of Appropriateness application for any exterior change, and its staff can approve an in-kind replacement without the Board.
Townhouses are about a fifth of the homes in town and small apartment and condo buildings about a quarter, and close to four households in ten rent. In a rental the owner usually approves the repair, so tell us who that is when you book, and they’ll see the price before a part goes in.
New Baltimore, on the county side of 20187, is younger: nearly every home is a single-family house and about half went up after 2000. A two-story house from those years often has a second system for the bedrooms, its air handler up in the attic. Close to three owners in ten there heat with electricity, usually a heat pump, and about one in seven burn propane, so plenty of air conditioners out there share a blower with a propane furnace. We work on both halves of that pairing; oil burners we don’t.
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 |
|---|---|---|---|---|
| New Baltimore | 1999 | single-family houses, nearly all | gas, about 5 in 10 | 1980s and 90s houses, most on their second or third system. |
| Warrenton | 1993 | single-family houses, about 5 in 10 | gas, about 6 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.
Inside the town limits, a little over 4 of the roughly 110 square miles the two Warrenton ZIP codes cover: the Historic District around Main Street, Leeds Square, and the streets off Broadview Avenue and Alwington Boulevard.
New Baltimore only. It’s the one Census place on the county side with mostly Warrenton mail, so the farms and lots beyond it aren’t in these figures.
What you’d notice
When the air conditioner shares a blower with a gas or propane furnace, the furnace’s control board runs the cooling too. Look through the little window in the furnace door and count the flashes: the chart on the panel matches each pattern to a fault, and reading it to us on the phone tells the tech where to start.
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.
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.
In a two-story house with a second air handler over the bedrooms, a summer call should include its drain pan and float switch. A clogged line up there drips through a ceiling, and the switch is what shuts the system off before it does.
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.
Outstanding team. Did great work on our Church Air Conditioner. Most of all the team did a great job explaining everything they did and recommendations.
Questions
Yes, with the Town’s approval. The design guidelines let the Zoning Administrator or staff approve a window unit on a house as long as the historic window itself isn’t altered, and they suggest setting it in each spring and taking it out each fall so the sill can be checked. For more than one cool room, a ductless mini-split leaves the old windows alone.
Yes. In that setup the heat pump carries the house until it’s cold enough outside, then a control hands the heating to the propane furnace. The cooling needs the furnace’s blower as well as the outdoor unit, so a summer call checks both, and the switchover setting gets a look while the panels are off.
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 Warrenton 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.