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HVAC Services in Fairfax, VA – Heating & Cooling Experts
Last updated: November 2026
Need trusted HVAC services in Fairfax? From our office on Dorr Avenue, the AVS Heating and Air Conditioning team fixes, installs and services heating and cooling equipment for Fairfax homes and businesses. Site visits start at $90, most repairs cost $150 to $300 or more, and evening, weekend and holiday calls are priced the same as weekdays.
Family-owned since 1991, our team handles everything from AC breakdowns to furnace and heat pump problems, with same-day visits and 24/7 emergency repairs, based on availability.
Talk to AVS today
Tell us the problem and your address. We give you a time when you book and explain the cost before we repair.
VA 703-457-9028
MD 301-686-7129
Site visits start at $90. No extra charge for evenings, weekends or holidays.
- Family-owned since 1991
- Same-day service, based on availability
- NATE-certified, VA HVAC license 2705039269A
- 0% APR for up to 18 months on select units
Your Trusted HVAC Company in Fairfax, VA
A broken HVAC system can make your day hard. You need fast help from a team you can trust. AVS provides HVAC services in Fairfax for both homes and businesses, from our office at 2800 Dorr Ave, Suite R, Fairfax, VA 22031. We serve both the City of Fairfax and Fairfax County.
Does your AC blow warm air? Is your furnace not working? Or does your heat pump need repair? Our NATE-certified technicians find the issue, explain your options and give you the price before any work starts.
At a glance
Virginia HVAC license: 2705039269A
Main office: 2800 Dorr Ave, Suite R, Fairfax, VA 22031
Hours: 24 hours, 7 days a week, 365 days a year
Financing: 0% APR for up to 18 months on select units
Complete HVAC Services in Fairfax for Homes and Businesses
Your HVAC system works hard all year. Regular care and timely repairs keep it running well, whether you need a small repair or a new system.
Is your AC blowing warm air, leaking water or taking too long to cool your home? Our AC repair in Fairfax team finds and fixes the problem so your home is comfortable again.
A broken AC can make your workplace too hot for staff and customers. We repair cooling systems for shops, offices and other business spaces in Fairfax.
We provide furnace repair in Fairfax for gas and electric furnaces that fail to start, blow cold air or turn on and off too often, and help you choose a new one when replacement makes more sense.
For heat pumps, boilers and other heating systems that aren’t keeping your space warm, our heating repair service finds the fault and explains the best repair options.
We offer heat pump repair in Fairfax for units that make odd sounds or can’t hold the right temperature, plus new heat pump installations.
We repair heating equipment for offices, shops and other business spaces, then suggest a suitable fix.
Fairfax maintenance checkups are $79.95 and usually wrap up in under an hour. Our VIP maintenance plan adds two visits a year, priority service and repair discounts.
No hot water, or a tank that leaks or heats poorly? Our team finds and fixes common water heater problems.
Dust and debris build up inside ductwork over time. Our AC duct cleaning service clears it out.
Heating and Cooling Solutions for Fairfax Homes and Businesses
Fairfax has hot, humid summers and cold winters, which makes a working HVAC system vital all year. AVS helps local property owners keep their heating and cooling units in good shape.
Warm air, water leaks or strange sounds usually mean your AC needs repair. We check the system, find the cause and tell you whether a repair or a new unit is the better choice. Site visits start at $90; most repairs cost $150 to $300 or more, depending on the issue, parts and labor.
Small faults may only need a repair, but an old furnace with frequent issues can cost more to keep running than to replace. Our technician checks your furnace and explains both options and their costs before any work starts.
24/7 Emergency HVAC Repair in Fairfax, VA
HVAC problems don’t wait for a good time. Your AC may stop on a hot afternoon, or your furnace may fail on a cold night. AVS offers 24/7 emergency HVAC repair in Fairfax and takes calls at night, on weekends and during holidays. We also offer same-day service, based on our schedule and team availability.
Night, weekend and holiday calls carry no surcharge.
HVAC Permits in the City of Fairfax and Fairfax County
The City of Fairfax and Fairfax County have their own permit offices, so the rules for your HVAC project depend on your address and the type of work.
The county’s residential mechanical permit list includes new, replacement, repair or conversion of HVAC systems, duct installation and gas piping for equipment. Gas or oil appliance work may also need a Household Appliance permit and an inspection.
The city issues its own residential mechanical permits for new mechanical installations and modifications through its Code Administration office.
Our team checks the permit needs before work begins and explains which steps apply to your project.
What Happens When You Call
- You tell us the problem and your address. Describe what the system is doing, such as warm air, no heat, strange noises or a leak, and give your address so we know whether you are in the City of Fairfax or Fairfax County.
- We book your visit. We offer same-day service and give you a time when you book. For a no-heat or no-cooling emergency, say so and we treat it as an emergency call.
- We explain before we repair. The technician diagnoses the problem and explains the repair and the cost before starting. Site visits start at $90, and most repairs fall between $150 and $300 or more, with a custom quote for complex work.
Have this ready if you can (it helps, but you don’t need it to call): the age and brand of the system, what you noticed and when it started, and whether it has been serviced before.
Choose the fastest route for your problem:
- AC not cooling or blowing warm air: AC repair in Fairfax
- Furnace or heating not working: furnace repair or heating repair
- Heat pump problem: heat pump repair
- Planning a replacement: call for a free replacement estimate and ask about financing, including 0% APR for up to 18 months on select units
Why Choose AVS as Your HVAC Contractor in Fairfax?
Family-owned since 1991: AVS started in 1991 and still runs its main office right here in Fairfax.
Licensed and NATE-certified: AVS holds Virginia HVAC license 2705039269A, and our technicians are NATE-certified.
Same-day and emergency service: same-day visits when our schedule allows, and 24/7 emergency HVAC repair any day, at any hour.
Clear pricing: we explain the issue and share the repair cost before work begins.
Warranty on our work: coverage depends on the repair, parts and brand, and we explain the details before you approve the job.
Flexible financing: zero-down plans and 0% APR for up to 18 months on select units.
Rated 4.8★ from 354 Google reviews.
Fairfax Neighborhoods and ZIP Codes We Serve
AVS provides HVAC services across the City of Fairfax and the surrounding parts of Fairfax County.
Neighborhoods
ZIP codes
Our office at 2800 Dorr Ave, Suite R, Fairfax, VA 22031 is about four miles from Fairfax City Hall. Not sure if we serve your address? Give us a call and our team will confirm.
Fairfax HVAC FAQs
How do I know if my address is in the City of Fairfax or Fairfax County?
A Fairfax mailing address can be in either one. Your real estate tax bill shows which government assesses the property, and that office handles any permits.
Do you service condos and townhomes near George Mason University?
Yes. We work on condo and townhome systems across Fairfax, including units in closets and attics. Check whether your building needs advance notice for contractor access.
Can I visit your Fairfax office?
Our office is on Dorr Avenue in Fairfax, but almost all service happens at your home or business. Please call before stopping by so someone is there to help.
Do I need HOA approval before replacing an outdoor unit?
Many Fairfax HOAs ask for notice or approval when an outdoor unit changes size or location. Check your community’s rules before a replacement is scheduled.
Can one visit cover both my heating and cooling systems?
Yes. A technician can check the furnace or heat pump and the air conditioner during the same appointment, which is handy before a season change.
Do you install ductless mini-splits in Fairfax homes without ductwork?
Yes. Ductless systems heat and cool additions, finished basements and older homes that never had ducts, without major remodeling.
Schedule HVAC Service in Fairfax Today
Whether your AC just stopped, your furnace won’t start, or you’re planning a heat pump or furnace replacement, one call to AVS gets you a technician from a family-owned company based right here in Fairfax. We provide same-day service and 24/7 emergency repair, and after-hours visits cost nothing extra.
