The furnace is covering for it
In an Oakton house with both a furnace and a pump, a warm house can hide a dead pump for weeks. Check the outdoor unit on a cool morning. If it is silent while the furnace runs, we should look.
Oakton, Virginia
Heat pump repair in Oakton.
For heat pump repair in Oakton, 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 Oakton, SwiftPro is rated 5.0 stars across 1,130 reviews and works under Virginia Class A contractor license 2705192276. We cover heat pump repair in Oakton, Difficult Run and the Vale Road area. Houses with pumps added to gas furnaces, condo pads on Chain Bridge Road. 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
Send this and the office calls or texts you back to set a time.
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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 Oakton.
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 Oakton
Oakton splits close to even between gas and electric, so many houses run a heat pump and a furnace together.
Oakton does not lean one way. Gas and electric heat are close to even, and a lot of Oakton houses have both: a gas furnace for one level and a heat pump for another, or a heat pump that came when the old air conditioner died, sitting on a furnace that is still good. For those, a call about a cold house is a two-part question: which system serves the cold rooms, and which one is running.
The median owner home in Oakton went up in 1984, and nearly half were built from 1980 to 1999. A house that age is on its second or third heat pump. Pumps from the 2000s are at the stage where the capacitor and contactor go first, and a defrost board or reversing valve can follow. Anything installed before 2010 may be on R-22 refrigerant, which makes a big refrigerant repair a question of whether to spend on the old system.
Along Chain Bridge Road and Blake Lane are Oakton’s condos and townhouses, about a third of the owner homes between them. There the heat pump is a small outdoor unit on a pad or a balcony shelf and an air handler in a closet. Access depends on the association, and some buildings run one pad for several units, so tell us the address and the unit, and we will find the right one without disturbing a neighbor’s.
Out west on Vale Road and Fox Mill Road, the lots are bigger and the houses are almost all detached. Heat pumps there tend to be the main system, with strips behind them for the cold nights, and a failed pump leaves the strips to carry the house at a cost you will see on the next bill. If you have been on aux for days, call before the bill arrives.
Neighborhood by neighborhood
How the houses across Oakton 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 |
|---|---|---|---|---|
| Oakton | 1981 | single-family houses, about 4 in 10 | gas, about 6 in 10 | Mostly electric heat: heat pumps, and the bill shows trouble first. |
| Difficult Run | 1982 | single-family houses, nearly all | gas, about 6 in 10 | A mix of heat pumps and furnaces. |
By the numbers
Oakton houses, by the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
Oakton
ZIP 22124 as a whole: every Oakton address. The Oakton Census place in the table also takes in streets with Vienna and Fairfax mail.
- Median home built1984 Census
- Built before 1980about 4 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 1 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.
What you’d notice
What a heat pump in trouble in Oakton 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.
The outdoor unit is a block of ice
A little frost on a cold morning is normal, and the unit melts it off every so often by running backwards for a few minutes. Ice that builds for hours and covers the whole coil usually means the defrost board, a sensor, or low refrigerant.
Need heat pump repair in Oakton?
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 Oakton.
Questions worth asking anybody who comes out, us included.
Can the tech tell me which system to repair first?
In a house with a furnace and a heat pump, a tech who tests both can tell you which is closer to failing. You decide with that in hand, not just the part that happened to break today.
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.
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
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 Oakton.
Can a heat pump and a gas furnace share one thermostat?
Yes, with the right controls, and many Oakton houses run that way. The thermostat picks one by outdoor temperature. If it picks wrong, the fix is usually settings or a sensor, not new equipment.
My Oakton heat pump is 16 years old and won’t start. Repair or replace?
Start with the cheap parts: a capacitor at $240 to $370 or a contactor at $290 to $425 explain a lot of no-starts. If it is the compressor, we show you the replacement numbers so you can compare.
Why does my heat pump in Oakton 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 Oakton?
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 Oakton 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.