Reliable HVAC Services in Warrenton, VA
Warrenton, VA, is known for its charming downtown, rolling hills, and historic homes. Keeping your home comfortable throughout the changing seasons is essential, and CW Mossor Heating & Cooling is here to help. Whether you need a quick air conditioning repair, a furnace replacement, or duct cleaning, we provide expert HVAC services to keep your system running smoothly. Call us at 540-277-9920 , or contact us online to schedule your HVAC service today.
Air Conditioning Repair and Replacement in Warrenton
When the heat rises in Warrenton, a reliable air conditioning system is a must. Whether your AC isn’t cooling properly, is making strange noises, or won’t turn on at all, our technicians provide fast and reliable air conditioning repair to restore comfort to your home. If your AC system is outdated and inefficient, upgrading to a new energy-efficient model can save you money on your energy bills and improve overall comfort. Our air conditioning replacement service ensures that your new system is installed correctly for optimal performance.
After spending a day exploring the beautiful G. Richard Thompson Wildlife Management Area, the last thing you want is to come home to a broken AC. Trust us to keep your home cool during the hottest months.
Gas and Oil Furnace Repair and Replacement
When winter temperatures hit, you need a heating system you can rely on. CW Mossor Heating & Cooling offers expert gas and oil furnace repair and replacement services to keep your home warm and comfortable. If your furnace is making strange noises, struggling to heat your home evenly, or not working at all, we can quickly diagnose and fix the problem. If your furnace is nearing the end of its lifespan, we’ll help you choose an efficient replacement that fits your home’s needs.
Heat Pump Repair and Replacement
Heat pumps are popular in Warrenton for their ability to heat and cool homes efficiently. However, like any system, heat pumps require maintenance and occasional repairs. Whether your heat pump is failing to heat properly in winter or cool in summer, CW Mossor Heating & Cooling can provide expert heat pump repair to get it back to optimal performance. If your system is old or frequently breaking down, we also offer heat pump replacement to improve your home’s energy efficiency.
Gas and Oil Boiler Repair and Replacement
Boilers provide consistent warmth during the winter months, but when they malfunction, it can leave your home cold and uncomfortable. CW Mossor Heating & Cooling offers professional gas and oil boiler repair to ensure your home stays warm. If your boiler is showing signs of wear or is no longer operating efficiently, we can recommend and install a boiler replacement to provide better heating performance and reduce your energy costs.
Duct Cleaning and Indoor Air Quality Solutions
Your home’s air ducts can accumulate dust, allergens, and other pollutants over time, impacting your indoor air quality and HVAC system efficiency. Our duct cleaning services remove buildup from your ductwork, allowing your HVAC system to run more efficiently and improving the air you breathe. Additionally, we offer air filtration systems to further enhance indoor air quality, trapping particles like dust, pollen, and pet dander.
Why Choose CW Mossor for HVAC Services in Warrenton?
At CW Mossor Heating & Cooling, we take pride in serving the residents of Warrenton with reliable, affordable, and professional HVAC services. Our experienced technicians understand the specific heating and cooling needs of homes in the area and are committed to delivering solutions that improve your comfort and energy efficiency. We also offer flexible financing options to make necessary HVAC repairs and replacements more affordable.
Schedule Your HVAC Service Today
Don’t let HVAC problems disrupt your comfort. Whether you need air conditioning repair, furnace replacement, or duct cleaning, CW Mossor Heating & Cooling is here for homeowners in Warrenton, VA. Call us at 540-277-9920 , or contact us online to schedule your service today.
Recent Jobs and Reviews
Job Locations and Reviews


New air conditioner installed with R454B refrigerant on Rheem equipment.


Gas furnace heating service call. Performed gas furnace repair on Heil.

I repaired a heat pump that was cycling on and off. I checked the electrical connections, cleaned the coils, and adjusted the thermostat. The heat pump is now working properly.
Came the same day that I had my issue and followed up until the job was done very professional, clean and courteous
Thank you for your kind words, Pam! We're glad we could help you with your issue and that you were satisfied with our service. We appreciate your business and look forward to serving you again in the future.


Gas furnace maintenance call. Performed tuneup on gas furnace and zoning system. Replaced thermostat downstairs hallway. System serviced is Carrier.


Gas boiler service call. Replaced safety relief valve and zone control on Weil-McLain.


Heat Pump / AC Service Call. Performed heat pump / air conditioning repair on Rheem. Heat pump had electrical short.


Heat Pump/Air Conditioning maintenance call. Performed tune-up on American Standard.
Heater went down during a snow storm. Carl came out next day and diagnosed the issue and was able to fix it same day. I felt the price was very fair also. Would call again.
Thank you for your kind words, Travis. We appreciate your business and are glad we were able to get your heat pump fixed quickly and efficiently.


Heat Pump Service Call. No Heat because of electrical short in system.


Dehumidifier service call. Clean Comfort dehumidifier isn’t dehumidifying the home.


Heat Pump / Air Conditioning Service Call. Variable Speed Blower Motor had seized up. Replaced Heat Pump/ AC blower motor on Rheem.


Hydronic Boiler maintenance call on Burnham. Performed tune up on fuel oil water boiler.


Heat Pump / air conditioning maintenance call. Performed heat pump / air conditioning tune up on Lennox.


Boiler service call. Found air in the hydronic system. Bleed air free of water boiler on Weil-McLain


Heat Pump / Air Conditioning maintenance call. Performed heat pump / AC tune up on Amana.


High Efficiency gas furnace service call. Replaced pressure switch for flue gas draft on Heil high efficiency natural gas furnace.


Gas furnace maintenance call. Performed Propane furnace tune up on Heil.


Gas furnace service call. Found gas valve not allowing gas to flow to the burners. Electrical wiring to gas valve wasn’t making good contact.


Gas furnace maintenance call. Performed gas furnace tune up on Goodman.


Gas furnace maintenance call. Performed gas furnace tune up on Rheem.


Gas Furnace maintenance call.Evaluated natural gas furnace and found heat exchanger compromised. Inspected chimney and found no chimney liner of any type with gaps in bricks.

Installing a new 14 seer air conditioner
Mr Mossor was here on time as promised he was very good in checking my system out and finding two issues that needed immediate attention. He got the parts and fixed them in a short period of time and his prices we very reasonable and I would use him again
Thank you. We are happy to bring you peace of mind and certainly would be glad to serve you in the future.
Always helpful always on time fair pricing and always willing to help to do some extra things like changing a filter that I can’t reach. I always recommend Carl to other friends
Thank you. It's always a pleasure to assist in making your life more enjoyable and comfortable.
We received great service from Carl on our furnace today! We are ready for what the winter will bring.
"Thank you for your kind words, Matthew! We're glad we could provide you with great service.
Excellent service and responds to service calls quickly
Diane, thank you for your 5-star review! We appreciate your feedback and are committed to providing excellent service to all of our customers. We will continue to respond to service calls quickly and efficiently. Sincerely, Carl Mossor
Mr. Mossor always informed me of what he was doing each day he came to my house to replace my upstairs furnace and AC unit. Was on time everyday and took great care while working in my home. I could not have contracted with a better person.
Very customer friendly, did a great job on the repairs. Didn’t take long to get everything up and running properly. Would recommend using them. I would definitely call for any issues.
CW Mossor's contract price is reasonable and he scheduled a service/inspection appointment without delay. His invoice and report were thorough and professional. We hope to continue using Carl's company for years to come. Thank you!
I appreciate Carl's promptness, attention to detail, and explanations of service recommendations. I've never felt pressured from an "upsell" that I've encountered from some other HVAC companies.
Wonderful job ! Fast same day service !
Carl was able to get to our house on short notice on a weeknight when we sprang a radiator leak just before Thanksgiving with a houseful if guests on the way! Looked like a disaster looming but he got the problem stopped quickly and gave us an accurate estimate of the time it would take to get the radiator replaced. He always showed up on the date and time he promised. He was very clear in his communications via text messaging. All in all he did a first- class job! Will definitely call on him again in the future for our furnace & radiator care.
Carl was quick to respond to our request, he offered a fair comparable price to other companies and he was able to point out some installation issues for a new unit that other service techs had not noticed prior to beginning installation.
Carl is extremely professional, knowledgeable, courteous, organized, prompt, great communication, easy to work with, and was able to resolve any issues I had as well as answer any questions I had. I had many quotes but chose to go with Carl and his company to perform my HVAC work and highly recommend him and will definitely go to him with any other HVAC questions, concerns, or other work.
Carl is fantastic and my go to HVAC guy! Highly recommend!!