It worked last winter and quit now
The first real cold week is when a weak capacitor or a tired contactor finally gives out. A pump that fails to start on the first cold morning, with the indoor fan still running, is a classic.
Chantilly, Virginia
Heat pump repair in Chantilly.
For heat pump repair in Chantilly, the diagnostic visit is $99. Call SwiftPro, rated 5.0 stars across 1,130 reviews, at (703) 997-9757, 24 hours a day, 7 days a week.
For heat pump repair in Chantilly, SwiftPro is rated 5.0 stars across 1,130 reviews and works under Virginia Class A contractor license 2705192276. Heat pump repair in Chantilly, Greenbriar and the 20151 side: 1990s pumps at the age where small parts wear. We find the fault and price it in writing. A contactor runs $290 to $425 and a defrost board $450 to $1,150, from our published price book.
- Prices in writing, first
- Heat pumps and air handlers
- Dedicated HVAC team
5.0 stars across 1,130 reviews
A Trane heat pump on its pad in a Northern Virginia winter, the kind of morning the calls come in.
Get your price in writing
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Rather talk now? (703) 997-9757
Licensed and insuredVirginia Class A contractor #2705192276
24/7 emergency serviceWe answer day or night, 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
What heat pump repair costs in Chantilly.
The same price book as the rest of our site. The diagnostic visit is $99, and the tech prices the repair before starting it.
Repair diagnostic visit
$99
Run capacitor replaced
$240 to $370
Contactor replaced
$290 to $425
Thermostat replaced
$300 to $640
Defrost board replaced
$450 to $1,150
Control board replaced
$550 to $1,180
Prices checked .
We answer day or night, 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 a heating maintenance visit comes every fall.
What’s different in Chantilly
Chantilly’s housing is a 1980s and 90s block, so its heat pumps are right at the age of small-part failures.
Six in ten Chantilly owner homes went up between 1980 and 1999, and the median is 1987. The heat pumps in them have been replaced once, and the replacements are mostly from the 2000s and early 2010s. That puts a lot of Chantilly pumps in the middle of their working life, where the cheap, common parts go: capacitors, contactors, the defrost control. Most Chantilly repair calls are those, and most are quick.
Chantilly runs close to even between gas and electric. The heat pump houses are the 20151 ones with an air handler in a basement or closet and strips inside it. The gas houses around Greenbriar and over the line toward South Riding lean on furnaces, with a heat pump as the cooling half of the system. For a heat pump that does both, a no-heat call means the pump is down. For one paired with a furnace, it may mean the furnace is covering.
A Chantilly heat pump of 2005 to 2012 vintage may be on R-410A, which is the refrigerant most newer pumps use, or may be an older R-22 unit if it was installed before 2010. The nameplate on the outdoor unit says which. Photograph it and send it, because the refrigerant changes what a leak repair means.
About a quarter of Chantilly’s owner homes are townhouses, and those have pads in a row behind the building. Detached houses have pumps along the side, often under a deck or near a fence line. Both collect leaves, and both can have the coil blocked by landscaping. Before you call, clear the area around the unit and see whether it still ices.
Neighborhood by neighborhood
How the houses across Chantilly are heated.
Census figures for each place, and what that usually means for a heat pump. Median year built and heat count owner-occupied homes only.
| Place | Median home built | Most homes are | Heated with | What that means for a heat pump |
|---|---|---|---|---|
| South Riding | 2006 | single-family houses, about 5 in 10 | gas, about 8 in 10 | Mostly gas: heat pumps here often sit over a furnace. |
| Chantilly | 1987 | single-family houses, about 6 in 10 | gas, about 5 in 10 | Mostly electric heat: heat pumps, and the bill shows trouble first. |
By the numbers
Chantilly houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
20151, the Fairfax County side
- Median home built1987 Census
- Built before 1980about 2 in 10 Census
- Built since 2000about 2 in 10 Census
- Most homes aresingle-family houses, about 6 in 10 Census
- Heated withgas, about 5 in 10 Census
- Rentedabout 2 in 10 Census
- A lot of homes here heat with electricity, most of them heat pumps, so a failing outdoor unit shows up on the power bill before it shows up as a cold house.
20152, the South Riding side
- Median home built2006 Census
- Built before 1980hardly any Census
- Built since 2000about 8 in 10 Census
- Most homes aresingle-family houses, about 5 in 10 Census
- Heated withgas, about 8 in 10 Census
- Rentedabout 2 in 10 Census
- Most homes here heat with gas. Where a heat pump sits over a gas furnace, the furnace takes over in the cold, so a dead heat pump can go unnoticed until spring.
- Many houses here were built since 2000 with a heat pump from the start. Plenty of those original units are now at the age where repairs come more often.
What you’d notice
What a heat pump in trouble in Chantilly usually does.
Aux or emergency heat that never goes off
When the outdoor unit stops pulling its weight, the electric strips in the air handler carry the house. The house stays warm, and the bill tells you a few weeks later. A stuck contactor is a common reason, and one of the cheapest fixes on our list.
Upstairs cold, downstairs fine
In a newer two-story house on one heat pump, the top floor lagging a few degrees can be ducts or the thermostat’s settings, not a failing unit. We check the system first and tell you which it is.
Need heat pump repair in Chantilly?
A person answers day and night. See this month’s deals before you call.
Choosing who fixes it
How to pick a heat pump repair company in Chantilly.
Questions worth asking anybody who comes out, us included.
Do they bring the common parts to the first visit?
At this age, a capacitor, a contactor and a defrost board cover most calls. A tech who arrives with them can often finish in one trip. Ask before you book.
Is the company licensed in Virginia?
Anyone can check on the state’s license lookup. Ours is Virginia Class A contractor license, on every van.
Do they price the repair before they start?
Every heat pump repair on our list has a range, and you hear where yours lands before a part goes in. If someone can’t give you a number until it’s done, keep looking.
Will they tell you when it’s not worth fixing?
An older heat pump with a refrigerant leak is often a bad repair. A good tech says so, with the repair price and the replacement price side by side.
Two of our crew going over a work order before the day's calls.
From our Google reviews
What our customers say.
5.0 stars across 1,130 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.
Excellent work by Tyler and Team. Right from pricing to performing professional installation of new Heat Pump.
- 5.0stars across 1,130 reviewsHow we count them
- ABBB Accredited, A ratingCheck it on bbb.org
- 2026Voted a Nextdoor Neighborhood Faves winner two years running: 2026 in 30 Northern Virginia neighborhoods, 2025 in Emerald Chase (Herndon) and Hunters Run (Chantilly)See it on Nextdoor
- #1BusinessRate Best of 2026: the top-ranked heating contractor in Fairfax, VirginiaSee our BusinessRate score
- Class AVirginia contractor, license #2705192276Look it up with DPOR
Where we work
Heat pump repair in every Northern Virginia town we serve
Next door to Chantilly: Centreville, Catharpin, Herndon, Oakton and Reston.
Fairfax County
Arlington County
Loudoun County
Prince William County
Fauquier County
Stafford County
Every town on one page
The system we put in first
Built to take a beating. Put in by our crew.
Heat lamps, snow and rain on one outdoor unit: that’s Trane’s own film. We’re a Trane Comfort Specialist, on Trane’s own dealer locator, and when you pick a Trane, our crew puts it in.
Films: Trane’s own.
Questions
Heat pump questions from Chantilly.
Is the refrigerant label on my heat pump worth checking before I call?
Yes. It sits on the nameplate of the outdoor unit. Knowing whether it says R-22 or R-410A tells us right away how a leak repair would look.
My Chantilly heat pump is about 14 years old and the fan won’t spin. What now?
Most often a capacitor at $240 to $370 or a contactor at $290 to $425. We test, price the exact part, and if something bigger turns up we put the replacement option beside it.
Why does my heat pump in Chantilly steam and go quiet in the cold?
That’s defrost. The unit stops the outdoor fan, runs backwards for a few minutes to melt frost off the coil, and you see steam rising. It’s normal. Ice that stays is not.
How much does heat pump repair cost in Chantilly?
The diagnostic visit is $99. From our price book, a capacitor is $240 to $370, a contactor $290 to $425, and a defrost board $450 to $1,150. You get the number before we start.
Ready when you are
Tell us what your heat pump is doing.
Call, or send the form at the top. The tech prices the repair from the book before starting, and if the system is at the end of its life 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
SwiftPro Plumber & Water Heaters
4200 Lafayette Center Dr, Suite N, Chantilly, VA 20151
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 1,130 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.