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AC, Heat Pump & Furnace Maintenance Plans in Reston, VA

Heating and cooling equipment manufacturers engineer their products for exceptional performance through many years of dependable service. However, complex machines with many moving parts are subject to stress and wear, especially when the outdoor weather is severe. Regardless of age, your HVAC equipment needs regular maintenance to operate efficiently and avoid unexpected breakdowns.

The Benefits of Regular Maintenance

Preventative maintenance is a critical element in optimizing efficiency and maximizing the life of the equipment. It is also a vital component in an effective indoor air quality strategy. On a periodic basis, our NATE certified and factory trained technicians visit your home or office and provide a variety of important HVAC maintenance services.

Routine HVAC maintenance can help improve indoor comfort, lower energy costs, and extend the life of the equipment. For customers in: Ashburn, VA; Bethesda, MD; Chantilly, VA; Fairfax, VA; Germantown, MD; Leesburg, VA; Potomac, MD; Reston, VA; Rockville, MD; and South Riding, VA; Mannix Heating and Cooling is the best choice in HVAC maintenance, installation, service, and repair.

Our Maintenance Services

Basic Plan ( Plan A)

Designed to help a homeowner or landlord make sure the home’s HVAC system is being properly cared for and minimize the chance of unexpected repairs.

  • Priority Scheduling over non Service Agreement customers
  • Discounted pricing on service and repairs
  • Discounts on new equipment
  • Two scheduled maintenance visits per year (one Spring, one Fall)

Work performed on our Spring visit:

  • Check refrigerant levels and proper pressures
  • Inspect and clean condenser coil
  • Inspect evaporator coil
  • Check air filter and replace if you have one available
  • Inspect and test condenser fan motor, compressor and contactor
  • Check voltage and amperage draw of the unit
  • Flush and check condensate drain

Work performed on our Fall visit:

  • Clean and adjust gas burners
  • Inspect furnace heat exchanger
  • Inspect and check wiring connections
  • Check air filters and replace if you have one available
  • Check and adjust gas pressure for proper combustion
  • Inspect and check ignitor or pilot light
  • Inspect blower and blower compartment
  • Check refrigerant levels on a heat pump system

Premium Plan (Plan B)

Designed to help eliminate unexpected repair charges that may occur during the normal lifespan of a home’s HVAC equipment.

Everything included in Plan A plus most Parts and Labor coverage (Exclusions for Plan B: Refrigerant coils, compressors, reversing valves and heat exchangers are not covered if they are over 10 years of age or out of the manufacturer’s part warranty. Motorized damper systems are not included in this agreement. Acts of nature, unauthorized repairs or modifications, discontinued or unavailable parts and operating costs are not covered by this agreement.)

Humidifier Coverage: (in addition to either plan)

  • Clean, check and adjust for proper operation
  • Replace pad on evaporative humidifier or canister on steam humidifiers

Water Heater Maintenance

Maintenance of your water heater will help maintain performance and life span of the water heater. Our maintenance visit includes:

  • Flushing 5 gallons of water from bottom of heater will help remove sediment. *
  • On gas water heaters, gas burners will be cleaned and flue inspected to ensure proper draft.
  • Electric water heaters will have element checked.
  • Water pressure will be checked and discharge temperature of water adjusted, if needed.

*If your water heater is over 5 years old and there is no proof of prior flushing or if the water heater has a plastic drain valve, flushing will not be possible. Plastic drain valves do not re-seal and large deposits of sediment (from lack of flushing) will prevent the valve from closing properly and will cause consistent leaking.

To read more about water heaters, click here. To schedule an appointment for maintenance of your existing water heater or for a new installation, call us at (703) 777-9211.

All service (except emergency NO HEAT), including Spring and Fall maintenance visits will be performed during normal business hours (Monday thru Friday, 8am to 5pm, except holidays). Service plans will automatically renew unless canceled by either party. Maintenance visits are considered “Use it or lose it”, and must be performed in Spring or Fall time frame.

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Customer Reviews

Shondra J ones

They were lifesavers!!! My furnace went out and after three days of dealing with the home warranty company and the unscrupulous vendor they sent to my home, I called Mannix. The service technician was friendly, efficient but most of all honest. He found the problem after twenty minutes, saving me thousands in unnecessary replacement costs. It is refreshing to know that honest people still exist.

Lynne Wilson

I contacted Mannix from a referral of a friend who has benefitted from the excellent service this company provides. I found out a couple I know in Vienna had their heat pump stop working a few months ago and needed to be replaced. I called up the Mannix office later in the day on Monday 11/30/20 and provided information needed. I had a proposal in my email the next morning 12-01-20. This will enable me to discuss with my friends how they wish to proceed with fair financing options available too. This is EXCELLENT customer service and I would like Mr. Mannix to know that Sarah is an amazing professional face for his company. I plan to become a customer of theirs by signing up for the annual maintenance plan which is very reasonable priced. Sincerely, Lynne Wilson

Philip Slingerland

Been a happy Mannix customer for a few years now, but recently had them replace our aging HVAC system. The whole process was very painless, from Eric helping us decide which system was right for our home, to the efficient and professional installation by Billy and Matt. I am very pleased with the new system and very impressed with the level of service, communication, and detailed information I received from everyone involved. Highly recommend!


Before dealing with Mannix I used two very well-known and “reputable” HVAC companies who did nothing but rip us off over the years. I was frustrated and found Mannix Heating & Cooling about 10 years ago. They installed a new HVAC system in my old home, and installed a water heater and various other items in my new home. They also have been doing yearly maintenance for years. Their employees are the most honest, reliable, and knowledgeable individuals in this industry. We recently had an issue with our HVAC system and they came out within a few hours on an emergency call. The technician was prompt, kind, professional, and very fair. He figured out what was wrong with our system quickly and remedied it immediately. Do not hesitate to call them if you need anything–you won’t regret it!

Wendy Collins

Mannix has always been professional from service calls to repairs and replacements. The technicians are always polite and knowledgeable. They consistently exceed our expectations.

Gary Hendricks

Mannix proved very responsive in fixing my A/C system. The tech, Erick, was very professional by taking the time showing and explaining to me the system problem prior to taking action replacing the coil. Ashleigh, customer service, was excellent in addressing and following through on concerns in order to achieve total customer satisfaction.

M. Reyzer

My 24-year-old heat pump finally decided to stop working. I sent a request for a replacement estimate late one night through the Mannix website and received a phone call early the very next morning to set up an appointment. Eric Holzworth stopped by my house the next day to go over my options. He was wonderful and so easy to work with and answered every question I had. He definitely listened to me and my concerns did not push me into purchasing a high-end system which I didn’t need. The technicians arrived at 8am and were finished with the entire installation by 1pm. They were very courteous and left my house in pristine condition. I HIGHLY recommend Mannix! They always returned my calls and emails right away, and Eric made sure I received all of my equipment on time–even with Carrier factory delays/limited supplies due to COVID. So glad I chose Mannix. I love my brand new Carrier system and my cold house during these hot and humid days.


We were in desperate need of a fix on our AC system during the July heatwave. The issue arose on a Saturday. Mannix came to the rescue in short order, fixed it, and at a reasonable price.

Silvio G was the technician, and he was GREAT.

We would definitely use Mannix again!

Patricia Ryan

I have been using Mannix for years. They have replaced my HVAC system and I have them do maintenance twice a year. The past couple of visits have been done by Ramiro. He is professional, polite, knowledgeable, and very helpful in assisting me with tips on the best ways to operate my system. Today, he installed a water safety device and taught me exactly how it works and how to reset it. I’m so impressed with him! I will continue with Mannix for years to come as I find them to be very reputable and reliable. Thank you!

Rachel Craft

I’ve been using Mannix for years and have never been disappointed. They’ve replaced my HVAC, hot water heater and installed a humidifier on my furnace. Whenever I need them, they can get me on the schedule in a timely manner. All the personnel are great and I trust Jerry and his team with their recommendations and the work they do. Would highly recommend.

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