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Contact Mannix Heating and Cooling for HVAC and Pool Heat Pump Service Today!

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; Chantlly, 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

Maintenance Plan

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

Work performed on our Pool Heat Pump maintenance visit:

  • Clean the outdoor coils by washing with water and chemical cleaner.
  • Check the two capacitors for proper ratings
  • Check the amp draw of the fan motor and the compressor to ensure proper function
  • Check contactor to ensure terminals are clean
  • Check the temperature rise to ensure the unit is heating properly

Work performed on our Gas Pool Heater maintenance visit:

  • Check gas pressure at the gas valve for proper combustion
  • Clean and adjust gas burners
  • Inspect heat exchanger
  • Inspect and check ignitor assembly
  • Check the temperature rise to ensure the unit is heating properly

We’re in Your Neighborhood

Whether you’re in Gaithersburg, MD, Chantilly, VA, or Treasure Island, FL, our local teams are ready with 24-hour answering service and experienced technicians who keep your systems running when you need them most.

Gaithersburg, MD

7824 Beechcraft Ave
Gaithersburg, MD, 20879
(301) 260-6000

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Chantilly, VA

26955 Gum Spring Road
Chantilly, VA, 20152
(703) 777-9211

View Location

Treasure Island, FL

10625 1st Street E. Suite 200
Treasure Island, FL, 33706
(727) 999-7002

View Location

HVAC Maintenance

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Comprehensive Climate Control Solutions

Our comprehensive approach encompasses everything from routine maintenance to complete system overhauls, ensuring optimal performance throughout every season. We specialize in both residential and commercial applications, understanding that each environment presents unique challenges requiring customized solutions.

Mannix Rewards

Receive up to $100 Mannix Heating & Cooling Visa® Prepaid Card

Customer Referral Program

Customer Reviews
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...
Lynne Wilson Leave a Review
Customer Reviews
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...
Customer Reviews
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...
Philip Slingerland Leave a Review
Customer Reviews
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...
Gary Hendricks Leave a Review
Customer Reviews
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...
Customer Reviews
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!
Customer Reviews
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,...
Patricia Ryan Leave a Review
Customer Reviews
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...
Shondra J ones Leave a Review
Customer Reviews
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...
Rachel Craft Leave a Review
Customer Reviews
Mannix has always been professional from service calls to repairs and replacements. The technicians are always polite and knowledgeable. They consistently exceed our expectations.
Wendy Collins Leave a Review
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