Open 24/7 for emergencies
For heat pump repair in Hamilton, 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 Hamilton, SwiftPro is rated 5.0 stars across 1,130 reviews and works under Virginia Class A contractor license 2705192276. Heat pump repair in Hamilton and the countryside around it, where half the homes run on electric heat and the pumps come from three different decades. 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.
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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 Hamilton
Over half the owner homes in Hamilton’s ZIP heat with electricity, which here mostly means a heat pump, and nearly all of them are detached houses. What stands out is the spread. About four houses in ten were built before 1980 and about four in ten since 2000. The median owner home is from 1988, but that number hides a lot. We think of Hamilton as three towns of equipment, and the repair depends on which one you are in.
In the oldest houses, the heat pump was added to a house that started with something else, and the ducts, the wiring and the thermostat are all older than the pump. On those jobs a failure is as likely to be a tired blower or a loose connection as the refrigerant system, and we trace it step by step. If the pump predates 2010 its label may say R-22, which the EPA stopped making in 2020, and big leaks on those are where we talk about replacing it.
The 1980s and 90s houses are where the capacitor and contactor calls come from. Those parts wear with every start, and a heat pump starts all year, summer and winter alike. A hum with a fan that won’t turn is the classic sign, and it is a quick, cheap fix if you shut the unit off before the motor cooks. The newest pumps, set in the last twenty years, show up with sensor and board faults, and those are mostly worth repairing.
Out in the country a heat pump that won’t restart after a power outage is a real call. Switch the thermostat off, wait a few minutes, and turn it back on before you decide it is broken; a compressor often needs that pause. If it still won’t start, the cause is usually a breaker, the contactor or a safety lockout, and we check them in that order.
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
ZIP 20158 as a whole: every Hamilton address, the Town and the countryside around it. The Census place for the Town alone has too few homes for steady figures.
What you’d notice
After an outage or a power flicker, a unit that starts and drops out within a minute has usually tripped a safety, or has a contactor chattering. Don’t keep cycling it at the thermostat; each try works the compressor harder. Call, and the diagnostic is $99.
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.
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 Hamilton?
A person answers day and night. See this month’s deals before you call.
Choosing who fixes it
Questions worth asking anybody who comes out, us included.
In a Hamilton house the pump could be 15 or 35 years old. A tech who asks the year, and reads the refrigerant off the label, is deciding whether the repair makes sense. One who quotes first is just selling a part.
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 by Tyler and Team. Right from pricing to performing professional installation of new Heat Pump.
Where we work
Next door to Hamilton: Paeonian Springs, Purcellville, Leesburg, Lovettsville and Round Hill.
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
Usually, yes, after a short delay that protects the compressor. If it doesn’t within about five minutes, check the breaker, then call. A contactor at $290 to $425 is a common reason the outdoor half stays dead.
Call us for either; the visit tells you which is failing. If the pump is past saving, a replacement is priced next to the repair.
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 Hamilton 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.