"I've been working with Ali and team at 911 Air-Care for a couple years now for seasonal maintenance. I recently had a recurring issue crop up with one of my mini-splits that previous companies had failed to properly address. I told Ali my concerns with previous repair attempts, and he and his techs dug deeper and found the potential root cause, rather than just replacing parts. Their solution seemed logical and much more likely to be a long term fix. Time will tell if that's the case, but I am very pleased with the process and work."

Your heat or AC quit. We pick up.
911Air-Care repairs, replaces and maintains furnaces, air conditioners, heat pumps, ductless systems and water heaters from Herndon across Northern Virginia. A live person answers the phone 24/7, and the techs explain your options before they touch anything.
- 4.9/5153 Google reviews
- 4.9/5222 Thumbtack reviews
- Top ProOn Thumbtack in 2024 and 2025
- Class CVirginia contractor license #2705-193952
Customers remember the tech by name.
Ali, Parsa and the rest of the crew come up again and again. These are copied as customers wrote them on Google and Thumbtack. Read more reviews
"I needed to find out what was going on with my hvac system in my condo. Parsa was so helpful with diagnosing the problem. And gave me great recommendations. He even went above and beyond with speaking to the maintenance workers and to my upstairs neighbor whose hvac system was leaking into mine. The price quoted was also very reasonable. Personable and Professional! I highly recommend 911Air-Care"
"Same-day service on tankless water heater. Quick, great service, and easy pricing. Would recommend and use again."
"The tech Ali gave a lot of helpful suggestions and was very knowledgeable about the system. I called for estimates on changing the HVAC register box in an apartment. Ali gave me several options to get better performance out of a system that previously has been giving me several problems and I was questioning whether the building was suitable for central air. I appreciate being advised on different options to choose instead of just making a fix that would have to be redone in a few months."
"AC broke and 911 was the first available despite already being late in the day. They figured out the issues quickly and even had the right part. I like them so much I had them come back to do some routine maintenance that was sorely needed."
"Parsa diagnosed my Heating issue quickly, And only charge the diagnostic fee. He also gave me ideas of next steps in the event of future Issues"
"Quick, efficient and good value. They came out two hours after inquiry, fixed the issue and we are pleased with the service. Thank you!"
"Great experience. They gave me a 3-hour window for service and showed up on time. I'm a new landlord, and this was for a maintenance check on the HVAC system, so I'm happy to work with reliable folks on projects. Thanks for everything!"
"Our technician Parsa was super friendly and knowledgeable. He fixed our problem in a jiffy and took the time to give us advice on how to avoid the problem in the future."
Heat, cool, and the hot water too.
Our logo is a flame over a snowflake for a reason. We fix and install everything that keeps the house warm in January and cool in August, and the water heater in the next closet over.
Heat + coolHeating and AC repairNo heat, no cooling, strange noises, warm air from the vents. Furnaces, air conditioners and heat pumps of every major brand, 24/7.
Heat + coolNew systemsA new furnace, air conditioner or heat pump when the old one is past saving, sized for your house and installed clean.
Heat + coolDuctless mini-splitsHeating and cooling for rooms the ducts never reached: additions, basements, attics, garages and older homes.
Indoor airIndoor air qualityWhole-house purifiers, humidifiers, dehumidifiers, fresh-air ventilators and smart thermostats that work with the system you have.
Hot waterWater heatersTank, tankless and heat pump water heaters, plus expansion tanks, mixing valves and recirculation pumps. Same-day service is common.
Hot waterWater qualityElectronic water descalers, faucet aerators and hot water packages that fight scale and wait time at the tap.
Heat + coolMaintenance plansTune-ups before summer and before winter, front-of-the-line service and discounts on repairs. From $15.75 a month per system.
Pick a plan and see your year.
These are our maintenance plans at the prices we publish. Choose one, tell us how many systems your home has, and see what a year costs and what comes with it.
- 15% off emergency repairs
- 5% off a new full system
- Same-day timing
- $49.80 diagnostic fee
- Front-of-the-line service
- One-year labor warranty on replaced parts
- Price stays put while the plan is active
- 20% off emergency repairs
- 10% off a new full system and add-ons
- Same-day timing
- $29.80 diagnostic fee
- First in line
- No extra charge for night or weekend emergency calls
- One-year labor warranty on replaced parts
- Price stays put while the plan is active
- Filters included: four standard 1-inch or two media filters
- 20% off emergency repairs
- 10% off a new full system and add-ons
- Same-day timing
- $29.80 diagnostic fee
- First in line
- No extra charge for night or weekend emergency calls
- One-year labor warranty on replaced parts
A new full system gets its first year of plan fees free. Partial systems pay 25% to 50% less. Plans renew yearly until you cancel.
Photos from our own jobs.
Every photo on this site comes from a 911Air-Care job: rooftop condensers, closet furnaces, basement water heaters and the rest.









From your call to the fix.
Every call goes the same way, so you know what happens next.
- 01You call
A real person answers, day or night. Tell them what the system is doing and when you can be home.
- 02You get a confirmation
We send a booking confirmation with your arrival window, so you aren't waiting around all day.
- 03We are on the way
Your tech calls before heading over and sends a GPS link, so you can watch the van come to you.
- 04You pick the fix
We find the cause, explain your options in plain language, and do most repairs on the spot once you choose.
Herndon and the rest of Northern Virginia.
We are based in Herndon and work from Leesburg to Alexandria. These towns have their own pages. We also cover Vienna, Tysons, Falls Church, Arlington, Alexandria, Manassas, Centreville, Woodbridge and Washington, DC.
Not sure we reach you? Call (571) 910-9901 and ask.
No heat, no cooling, or no hot water?
Call and a real person picks up, any hour. We find the cause and give you your options before any work starts.
Yes. The office keeps regular hours Monday to Saturday, 8:00 am to 5:30 pm, but the phone is answered by a live person 24 hours a day and emergency service runs every day. If the heat is out in January, call (571) 910-9901.
We are based in Herndon and work across Northern Virginia: Reston, Sterling, Ashburn, Leesburg, Fairfax, Vienna, Tysons, Falls Church, Arlington, Alexandria, Manassas, Centreville and Woodbridge, and into Washington, DC. Not sure about your street? Call (571) 910-9901.
We service all the major brands of furnaces, air conditioners, heat pumps and ductless systems. You will see Goodman, Carrier and Daikin equipment in our job photos, along with Rheem and Navien water heaters, but we are happy to look at whatever is in your house.
Yes. A visit starts with a diagnostic fee, and that covers finding the problem and walking you through your options. Plan members pay less, $49.80 or $29.80 depending on the plan. Call for the current fee for a one-time visit.
Yes, a lot. We work on closet air handlers and rooftop condensers in condos, apartments and townhouses, and we will talk to your building's maintenance staff or a neighbor when a problem crosses units.
911Air-Care LLC holds a Virginia Class C contractor license, number 2705-193952, and our license is verified on Thumbtack. We are glad to show it when we arrive.
We take credit cards, cash, check, Zelle, Venmo, Apple Pay, Google Pay and Samsung Pay.
Tell us what the system is doing.
Call, email or send the form and we will set a time. If the heat is out in winter, the AC is down in a heat wave, or water is coming from the unit, call. A live person answers 24/7.
- Phone(571) 910-9901
- Other lines(703) 772-8384 · (571) 524-0276
- Emailinfo@911air-care.com
911aircare@gmail.com - OfficeMon to Sat, 8:00 am to 5:30 pm. Phone and emergency service 24/7.
- Address1210 Autumn Pl, Herndon, VA 20170
