Open 24/7 for emergencies
For heat pump repair in Annandale, 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 Annandale, 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 Annandale, Wakefield and Woodburn, ductless mini-splits included. We find why it isn’t heating and price the fix before any work. A contactor runs $290 to $425 and a defrost board $450 to $1,150, from our published price book.
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
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 Annandale
Only about a quarter of Annandale owners heat with electricity, yet ductless mini-splits are a bigger part of our work here than anywhere else we go regularly. That’s the 1960s at work. Eight in ten homes went up before 1980, mostly ramblers and split-levels with one furnace and ducts that never reached the addition, the sunroom or the finished lower level. Owners filled those gaps with a mini-split, and a mini-split is a heat pump.
A wall head that stops heating usually tells you why, if you know where to look. Most blink a light in a pattern or show a code on the display. Count the blinks or note the code before you turn it off. A head that drips inside in winter, or an outdoor unit that runs while the head blows room air, points to a sensor, a board or low refrigerant, and each of those starts with the code.
The remote catches people out too. A mini-split set to cool, dry or fan mode will happily run all day and never warm the room, and the little remote is easy to bump. Check the mode first. Then check the outdoor unit: these sit low, often tucked against the foundation by a patio, and snow or leaves pile against them fast. A blocked coil can’t pull heat from outside air.
For the central heat pumps in Annandale’s gas houses, the common complaint is that the air feels cool. Folks who grew up with a gas furnace expect hot air from the registers. A heat pump sends air that’s warm but noticeably milder, and that’s normal. Cold air, though, or a house that can’t hold the thermostat setting, is a real fault. Ask the tech to read the supply temperature for you so you know which one you have.
Neighborhood by neighborhood
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 |
|---|---|---|---|---|
| Annandale | 1967 | single-family houses, about 5 in 10 | gas, about 7 in 10 | Mostly gas: heat pumps here often sit over a furnace. |
| Wakefield | 1968 | single-family houses, nearly all | gas, about 8 in 10 | Mostly gas: heat pumps here often sit over a furnace. |
| Woodburn | 1968 | single-family houses, about 4 in 10 | gas, about 6 in 10 | Mostly gas: heat pumps here often sit over a furnace. |
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
In an Annandale house where a mini-split heats the addition or the lower level, the furnace keeps everything else warm, so a failed head only shows up in one room. Check that room’s head for a blinking light before assuming the furnace is short on heat.
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.
Cool air for a few minutes on a frosty morning is the unit defrosting. Cool air for an hour is not. Check that the thermostat is on heat, not cool or auto, then call.
Need heat pump repair in Annandale?
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Choosing who fixes it
Questions worth asking anybody who comes out, us included.
Plenty of Annandale houses have both. Ask whether the company services mini-splits, can read their fault codes, and carries the parts for the brand on your wall. A central-only shop will often just tell you to replace the head.
Anyone can check on the state’s license lookup. Ours is Virginia Class A contractor license, on every van.
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.
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
5.0 stars across 1,130 reviews. Read them on our reviews page.
Excellent work done honestly and efficiently. Efrain the technician was great. Was able to diagnose the problem quickly and get my older Amana gas furnace system working again.
Where we work
Next door to Annandale: Falls Church, Springfield, Burke, Arlington and Fairfax Station.
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
Write down the blink pattern first. Then turn it off at the breaker or disconnect for a few minutes and back on. If the same code comes back, call, and tell us the brand and the code. The diagnostic is $99.
On a central heat pump, a capacitor runs $240 to $370 and a thermostat $300 to $640. Mini-split parts vary by brand, so the tech prices the part in writing before ordering it. If a repair doesn’t make sense, we’ll show you replacement pricing next to it.
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.
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
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 Annandale 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.