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 Catharpin, ZIP 20143, priced from a published book before any panel comes off.
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.
What’s different in Catharpin
Hail up to ping pong ball size fell near Catharpin on August 18, 2011, and a second report that afternoon reached golf ball size. Stones like that dent the thin aluminum fins on an outdoor coil, and bent fins choke the airflow the unit needs to shed heat. If your condenser has dents or combed-flat patches, a unit that struggles in July may be showing damage from a storm years back.
Thunderstorms are hard on the electrical side. The June 22, 2020 storm blew down numerous large trees near Catharpin with winds estimated near 69 mph, and trees came down on Sanders Lane on May 22, 2022. A power surge can pit the contactor, the relay that switches the outdoor unit on, and weaken the capacitor beside it. A contactor replaced is $290 to $425.
Dulles logs 32.7 days a year at 90 degrees or hotter, and Manassas, a similar distance away, runs closer to 40.5. July nights bottom out near 66.8 degrees, so a unit gets little rest. The median owner home dates to 1986, but a bit under four in ten were built from 2000 on, and condensers from those years are reaching the age where parts begin to fail.
Electric is the leading heat in ZIP 20143, at 46% of owner homes. Where that means a heat pump, the outdoor unit works through January as well as July, so a cooling complaint and a heating complaint can be the same part. A defrost control that sticks leaves it iced over on a morning near the January average low of 25.2 degrees, and a defrost repair runs $450 to $1,150.
What you’d notice
A hum with a still fan usually points to the capacitor, and a click without a start points to the contactor. Switch the system off at the thermostat rather than letting it keep trying. In a Catharpin July a stuck motor running hot can cost you the compressor, which is the expensive part.
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.
That’s an airflow problem far more often than a refrigerant problem: a clogged filter, a matted coil, or a blower wheel packed with dust.
Choosing who fixes it
Questions worth asking anybody who comes out, us included.
After a stormy season, a unit that won’t start is often a small part, not the compressor. A technician who reads the capacitor and checks the contactor first saves you paying for the wrong repair. Ask for the readings, and ask what finding a refrigerant leak would run: $1,850 to $2,700.
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.
Elvis did excellent work repairing my heater and air conditioner. I couldn’t be happier!
Where we work
Next door to Catharpin: Gainesville, Haymarket, Centreville, Chantilly and Bristow.
Questions
Yes. Bent fins don’t stop a unit, they choke the airflow over the coil, so it runs longer and cools less. The August 18, 2011 hail near Catharpin is a reminder of what these units sit out in. A diagnostic visit shows how much capacity you’ve lost before you decide anything.
Prince William County treats a condensing unit swapped for the same type in the same spot as an ordinary repair that needs no permit. Moving it, or turning an air conditioner into a heat pump, changes the type or the place, and that lands on the county’s permit side. Tell us what you have now when you book.
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 Catharpin 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.