Virginia & Maryland Heating, Air Conditioning & Plumbing
Cost of Regular Maintenance Too High? We Believe in Affordable Rates

Heating & AC Maintenance in Sterling, VA

Ensure Longer-Lasting Equipment, Lower Utilities, & Cleaner Air!

At Donmar Heating & Cooling, our Sterling AC maintenance team is dedicated to making sure all of our customers are breathing the cleanest air possible at all times. The best way to ensure that your heating and air conditioning system runs effectively and efficiently is by scheduling regular preventive maintenance. We believe everyone should be able to afford preventive maintenance and reap its benefits.

Some of the benefits of regular heating & AC maintenance on your systems include:

  • Longer equipment life – Just like getting regular oil changes for your car, keeping up with heater and air conditioner tune-ups extend the lifespan of your unit.
  • Reduced utility bills – Because regular maintenance enables your system to run more efficiently and use less energy, your utility bills won’t increase year after year. In fact, many people see a decrease in their bills after enrolling in a maintenance plan.
  • Less-frequent repair – With regular HVAC tune-ups minor issues can be caught and fixed before they become major issues, which saves you from breakdowns and repair calls down the road. So not only will you deal with less repairs, but they'll be less costly as well.
  • Helps you stay under warranty - A lot of warranties for HVAC units out there require your unit to get maintenance checks at least once per year. Staying in compliance of these warranties can save you thousands on everything from minor repairs to replacement.
  • More predictable costs - If you're the kind of person that likes to budget ahead of time for expenses, then consult our Sterling, VA AC maintenance specialists today. A little bit of planning ahead of time will give a better idea of how much you'll be spending on HVAC each year.

That is exactly why we offer plans starting at just $178 per year. At a price that low, there is no reason not to invest in your Northern Virginia home HVAC system and your family’s comfort!

Preventive Maintenance Checklist

Our Sterling AC maintenance technicians recommend twice-yearly system tune-ups, which include one in the spring for your air conditioning unit and one in the fall for your home heating system. When one of our NATE-certified technicians comes to your home on a preventive maintenance call, he or she will go through an extensive checklist to make sure that your systems are running at maximum efficiency.

Our preventative maintenance checklist includes:

  • Check your thermostat to be sure it is measuring the temperature in your home properly
  • Perform an electrical check and tighten loose or faulty connections
  • Lubricate your system’s moving parts for smooth, efficient operation
  • Inspect the condensate drain for clogs to ensure proper indoor humidity
  • Test safety controls to ensure long-term system efficiency
  • Check refrigerant and fuel (for heating) levels

Do-It-Yourself Preventative Maintenance

In addition to professional tune-ups, the most important maintenance task is one you can do yourself – check and change your air filters. Many homeowners forget this simple task or do not perform it often enough. Dirty air filters impede air flow, reduce efficiency and negatively affect indoor air quality. We recommend changing your filter once a month for the best possible results.

To learn more about maintenance plans, and to get a free estimate, call our Sterling, VA AC Maintenance Experts at (703) 457-8676 in Virginia or 301-250-1899 for Maryland residents.

Don't Just Take Our Word for It!

See What Our Customers Have to Say About Our Service
  • “They are honest and straightforward with their recommendations and always give us various options. ”

    Samia K.
  • “Great company — replaced my furnace very efficiently and effectively. ”

    Chris C.
  • “It is so hard to find a trustworthy AC repair company and I think i have finally found it.”

  • “Really appreciate your crew. They answered all my questions and concerns, and the work appears to be impeccable!”

    Jeffrey N.
  • “Donmar Company defines customer service excellence to a higher level.”

    Scott H.
  • “Your customer service is outstanding and everyone that I spoke to or met in person speaks to the nature of your company.”

  • “This company is very attentive to the customer and respond to their concerns quickly.”

    Natalie M.
  • “I am thankful for Paul’s service and HIGHLY RECOMMEND Donmar Company to anyone with an HVAC issue!”

  • “We've been pleased with the units, but its your employees that have made the real impression - they've been uniformly fantastic!”


Creating Happy Customers Since 1990

Why We Are the #1 Trusted HVAC Company in Northern Virginia
  • Emergency HVAC Services 7 Days a Week

  • NATE Certified Technicians

  • Offering Free Estimates On Replacements

  • Flexible Financing Options with Approved Credit

  • Quality Service With Honest Values

  • Affordable Service Management Agreements

  • Over 30 Years of HVAC Experience

  • We Are On Time, Every Time