Open 24/7 for emergencies
The diagnostic visit is $99, and a run capacitor replaced is $240 to $370 from our published price book.
Get your price in writing
Send this and the office calls or texts you back to set a time.
We’ll call or text this number about your request. By sending it you agree to our terms and privacy policy.
Rather talk now? (703) 997-9757
AC and heat pump repair in Manassas, inside the City on its own power or out on the Prince William County side, priced from our book before work starts.
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.
Recent work
What our technicians found and fixed on visits in Manassas, from their notes on each job.
August 2026
No cooling: the indoor coil had iced over behind a very dirty filter. The drain and the electrical parts checked out; the fix was a clean filter and letting the coil thaw.
August 2026
A leak search found the refrigerant leak in the indoor coil, with repair and replacement options priced.
July 2026
A clogged condensate drain line cleaned out and flushed.
What’s different in Manassas
The City of Manassas heats half its owner homes with electricity, and in a house from around its 1985 median that usually means a heat pump, so roughly every other outdoor unit inside the city line runs in January as well as July. Past the line the balance tips: a little over half the county side’s owner homes burn gas, about three in four in Loch Lomond, and there the unit outside is a plain air conditioner leaning on the furnace’s blower.
The City also sells the electricity, and that can change an AC call. In its Load Management program, an enrolled central air conditioner carries a switch that, during a peak in demand, cycles the compressor off 15 minutes out of every half hour. Summer peaks usually fall between 4 and 6 p.m. on the month’s hottest days and last a few hours. So a City house that loses ground late on a scorching afternoon and catches up after dinner may simply be the switch at work.
Close to three in ten City homes are townhouses. In Sudley, just over the line in 20109, close to half are, with a 1977 median, so the condenser out back has likely been replaced more than once. In Bull Run half the homes are condos and apartments and two in three are rented: the outdoor unit may be on a roof or a balcony, so check whether the owner or the association handles the system before you book.
Downtown sits in the City’s largest historic district, whose design guidelines want outdoor HVAC equipment in an unobtrusive spot or screened with plantings or a fence. A repair doesn’t touch that. Moving a condenser to a new spot on a historic lot does, so talk to the City’s historic district staff before anybody pours a pad. A window unit in an existing window is one of the small changes the guidelines leave to City staff.
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 |
|---|---|---|---|---|
| City of Manassas | 1985 | single-family houses, about 4 in 10 | electricity, about 5 in 10 | Mostly electric heat: heat pumps that cool in summer and heat in winter. |
| Buckhall | 1995 | single-family houses, about 8 in 10 | electricity, about 5 in 10 | A mix of heat pumps and gas furnaces with a separate AC. |
| Sudley | 1977 | townhouses, about 4 in 10 | gas, about 6 in 10 | Townhouse streets: condensers side by side, air handler in a closet or attic. |
| Independent Hill | 2000 | single-family houses, nearly all | gas, about 6 in 10 | Newer houses: many original systems at 15 to 25 years. |
| Bull Run | 1995 | condo and apartment buildings, about 5 in 10 | gas, about 7 in 10 | Condo and apartment buildings: small splits and fan coils, roof or balcony condensers. |
| Yorkshire | 1984 | single-family houses, about 4 in 10 | gas, about 5 in 10 | 1980s and 90s houses, most on their second or third system. |
| Loch Lomond | 1968 | single-family houses, nearly all | gas, about 7 in 10 | Older houses on their third or fourth system, usually a gas furnace with a separate AC. |
By the numbers
From the Census Bureau’s 2020 to 2024 survey. Median year built and heat count owner-occupied homes only.
The whole City sits in ZIP 20110. It runs its own water, sewer and electric service.
Sudley and Bull Run in 20109, Yorkshire and most of Buckhall in 20111, Independent Hill in 20112, plus the county edges of 20110.
What you’d notice
On City power with a Load Management switch, that pattern can be the compressor cycling through the summer peak, which usually runs 4 to 6 p.m. If the house never catches up, if it’s warm in the morning too, or if ice forms on the copper lines outside, that’s a repair, not the switch.
Ice on the outdoor lines in July means low refrigerant or starved airflow. Shut it off to thaw and call; running it iced can take out the compressor.
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.
On City power it changes the first step: when an air conditioner enrolled in Load Management stops, the City’s program sends a service representative for a first-call diagnostic. A company that knows that will tell you to look for the City’s switch before booking you a visit.
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.
Excellent service and attention to detail. James was super thorough and explained everything to me. I highly recommend them for any plumbing needs
Jamie was great! Very helpful and informative; got our AC running again quickly and at a very reasonable price.
Where we work
Next door to Manassas: Bristow, Nokesville, Clifton, Centreville and Catharpin.
Questions
The City first, since its program sends a service representative for a first-call diagnostic on an enrolled air conditioner. If that visit points to a repair, or your system isn’t enrolled, call us. Our diagnostic visit is $99, and a contactor replaced runs $290 to $425.
Not to replace an electric one in a house: the City’s no-permit list covers swapping an appliance that burns neither gas nor oil. A first-time install is mechanical permit work, and in the historic district any permit for a change to the outside waits on the Architectural Review Board.
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 Manassas 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.