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

If your heating or cooling system breaks, finding an experienced HVAC repair service to restore comfort in your home or office will be essential to restore peace. At Mannix Heating & Cooling, we customize each customer experience according to individual customer needs; with decades of experience we aim to give the best possible service that ensures your HVAC unit continues running at maximum capacity all year round!

Complete HVAC Repairs Services

Our technicians are certified professionals with expertise in diagnosing, repairing and maintaining various HVAC issues – everything from air conditioner failure in summer heatwaves to heating system breakdown during cold months. Examples:

Our HVAC service center in Virginia repairs all types of AC units so that your home stays cool and comfortable.

Heating System Repair: From furnaces and heat pumps, we provide comprehensive heating solutions that keep your home comfortable throughout the year. Our ductwork repair services ensure airflow remains uninterrupted. Our thermostat technicians offer calibration or replacement services as necessary.

Signs You May Require HVAC Maintenance or Repair

Know when professional HVAC repair is necessary can save yourself from major headaches by being aware of warning signs such as these:

Your HVAC system could need maintenance if certain rooms become overheated while others remain cold.

Unusual Noises – Grinding, banging and squealing noises could indicate mechanical problems within your system, requiring immediate professional inspection and repair.

Increased Energy Bills – If your energy costs suddenly increase unexpectedly, that could indicate your system is working harder than necessary, signaling potential mechanical issues or inefficiency. This could be caused by dirty filters, blocked ducts, refrigerant leaks, or aging components struggling to perform.

Poor Airflow – Weak or uneven airflow may indicate an obstruction such as clog in filter/duct or even motor failure. This issue can lead to reduced comfort, poor indoor air quality, and higher energy bills. Prompt inspection and maintenance by a professional technician can prevent further damage and restore your system’s efficiency.

Frequent cycling – If your HVAC system seems to switch on and off frequently, it could be having difficulty maintaining an ideal temperature setting.

Why Mannix Heating & Cooling? 

At Mannix Heating & Cooling, our aim is to deliver outstanding services with quality, reliability, and customer satisfaction being top priorities. Here’s why homeowners and businesses turn to us:

Certified and Licensed Techs – Our team is fully trained and certified to address any HVAC repair needs you might encounter, with prompt response times and efficient repairs to minimize downtime. Likewise, with transparent pricing that does not contain hidden fees you are guaranteed the best value possible.

Customer Satisfaction Guarantee – We stand behind our work and guarantee complete customer satisfaction. 

Emergency Service Provider – HVAC problems can arise at any time; therefore we offer emergency repair services. 

Preventative Maintenance Can Save Expensive Repair Bills

Maintenance services offered include replacing filters as necessary, checking refrigerant levels and tightening electrical connections as necessary, lubricating moving parts as necessary and providing any additional lubricants required by customers.

Mannix Heating & Cooling’s comprehensive HVAC maintenance will extend the life and efficiency of your system, giving it increased longevity.

Mannix Heating & Cooling‘s HVAC maintenance can extend the life and enhance efficiency of your system, as well as prolong its longevity and ensure its best possible functioning.

Get The Top HVAC Repair Service Now in Chantilly, VA

Don’t allow HVAC issues to spoil your day – Mannix Heating & Cooling’s experienced repair services team in Chantilly are ready and waiting. Contact them now to set an appointment, experience top quality services from certified experts, and experience comfort once more.

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

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Treasure Island, FL

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

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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
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
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
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
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 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
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
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
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
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
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
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