Recent Jobs and Reviews
At a glance
CW Mossor Heating and Cooling has completed 25 jobs between August 2026 and October 2026.
The 15 customer reviews shown here average 5.0 out of 5.
The most recent job was on October 10, 2026.
Recent work covers Stephens City, VA, Winchester, VA, Middleburg, VA, Middletown, VA and Whitacre, VA.
Job Locations and Reviews
Carl M.
Heating maintenance call. Performed natural gas tuneup on Bryant / Carrier. Completed humidifier maintenance on Aprilaire 700 and replaced water panel / pad.
Stephens City, VA 22655
Carl M.
I performed a detailed heating maintenance service on a high-efficiency natural gas boiler. I inspected and cleaned the burners and heat exchanger, adjusted the air-to-fuel ratio, and calibrated control settings for precise temperature regulation. The flue system was thoroughly checked for blockages or damage. Operational tests confirmed the boiler's correct and efficient function. A comprehensive report detailing the maintenance and future care recommendations was provided to the customer.
Winchester, VA 22601
Carl M.
Propane service call. House propane pressure was too low. Adjusted exterior LP regulator to provide proper gas pressure to the home.
Middletown, VA 22645
Carl M.
I conducted a comprehensive oil boiler maintenance service on a Burnham and Beckett oil burner. This included a thorough tune-up, replacement of the oil nozzle, and cleaning of the electrodes with adjustments. The burner assembly was meticulously cleaned, and the oil filter was replaced. A smoke test was performed to ensure proper operation. Additionally, I adjusted the combustion air and flue draft damper, and completed a combustion analysis to optimize performance and efficiency.
Woodstock, VA 22664
Carl M.
Heating maintenance call. Performed natural gas tuneup on Goodman equipment. Chemically clean the blower wheel and tested system operation.
Lake Frederick, VA 22630
Carl M.
Air-conditioning maintenance call. Performed AC tuneup on Rheem for WAIW radio tower station, a Nexstar Media Group.
Linden, VA 22642
Carl M.
I performed a detailed natural gas furnace maintenance on a Rheem unit. Starting with a meticulous inspection, I examined the burners, heat exchanger, and airflow systems. Filters were replaced , electrical connections checked, and all components verified for proper function. The thermostat was calibrated, and safety controls tested. After ensuring everything was in order, I restarted the furnace to confirm it operated efficiently, ensuring optimal heating performance and extending the appliance's lifespan.
Stephens City, VA 22655
Carl M.
Humidifier installation call. Installed Aprilaire Power Humidifier with automatic control on Goodman equipment.
Middleburg, VA 20117
Carl M.
Heating maintenance call on Rheem. Performed heating tuneup on natural gas furnace.
Leesburg, VA 20176
Carl M.
Heating maintenance call. Performed heating tuneup on Lennox natural gas furnace.
White Post, VA 22663
Carl M.
Gas Furnace Maintenance Call. Performed heating maintenance inspection on Goodman natural gas furnace and Aprilaire 700 humidifier. Replaced humidifier water panel.
Lake Frederick, VA 22630
Carl M.
Furnace repair call. Replaced heat exchanger that had acid holes in in it on Carrier.
Middleburg, VA 20117
Carl M.
Air conditioning service call. Found condensation piping obstructed. Cleaned pipe. Removed dirty air filter that caused additional problems on Carrier.
Hume, VA 22639
Carl M.
Heating maintenance call. Perform natural gas furnace tuneup on Goodman.
Stephens City, VA 22655
Carl M.
Gas furnace maintenance call. Perform heating tuneup on a propane, Goodman furnace.
Middleburg, VA 20117
Carl M.
Heat pump maintenance inspection call. Performed heat pump tuneup on Carrier.
Middleburg, VA 20117
Carl M.
Gas furnace maintenance inspection. Performed natural gas furnace maintenance on Lennox.
Stephenson, VA 22656
Carl M.
Heat pump maintenance call. Performed heat pump maintenance inspection on Lennox equipment. Replace thermostat with corroded batteries.
Stephenson, VA 22656
Carl M.
Air conditioning service call. Found thermostat with no display. Replaced existing Braeburn thermostat with a new Honeywell Home thermostat which corrected issue and now home is cooling with Rheem equipment.
Warrenton, VA 20187
Carl M.
Air conditioning service call. Found low pressure switch had failed although refrigerant pressures were adequate and static position. Repaired refrigerant pressure switch on Carrier.
Whitacre, VA 22625
Carl M.
Air conditioning service call. Found compressor exploded at the wiring harness connection on Carrier.
Winchester, VA 22603
Carl M.
Air conditioning service call. Found improper solder / brazed refrigerant joint that was leaking refrigerant from the previous installation company on Daikin.
Shenandoah Farms, VA 22642
Carl M.
Heat Pump System Replacement Call. Replaced Goodman heat pump system with a Rheem heat pump system.
Whitacre, VA 22625
Carl M.
Air-conditioning service call. Found Goodman air conditioning, frozen up with ice.
Whitacre, VA 22625
Carl M.
Air conditioning service call. Performed AC repair on Trane. Found EZ trap obstructed, which had triggered the safety and shut the system down. Cleaned EZ trap and system began operating.
Winchester, VA 22602
Review
Carl was here within about 20 minutes of the initial call This was 100° day and my air-conditioning was completely out Carl had everything back up and running very quickly You’re not going to find better service or technician than Carl Mosher and sons
Response from CW Mossor Heating and Cooling:
Thank you for the wonderful feedback about Carl's quick response and excellent service on such a hot day, we truly appreciate you taking the time to share your experience with us.
Review
Excellent service
Response from CW Mossor Heating and Cooling:
Thank you.
Review
Carl was very helpful and understanding. He was able to fix our AC problem the same day.
Review
Very professional and thorough
Review
HVAC replacement install. Carl was prompt, courteous and constantly kept me in the know of what was going on. Some issues arose with the install but Carl worked through them with patience. The install took longer than planned, but Carl worked diligently. I will use him in the future for servicing this unit as well as my other unit. Carl is meticulous and detailed in his work. He does not cut corners and does the job required. Pricing is very fair. His quote included a few other things other installers did not even consider and his price was even a little lower than other installers for similar equipment.
Response from CW Mossor Heating and Cooling:
Thank you. I am very happy that you are pleased with the work and hope to continue providing excellent service in the future as well.
Review
It’s been 3 years since I started using Carl’s service, and I’ve never been disappointed. Honest, hard working, and a true professional. You receive an arrival time, and it’s not a 4 hour window. If he says 10am, you can trust he will be there. Thank you
Review
Came the same day that I had my issue and followed up until the job was done very professional, clean and courteous
Response from CW Mossor Heating and Cooling:
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.
Review
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.
Response from CW Mossor Heating and Cooling:
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.
Review
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
Response from CW Mossor Heating and Cooling:
Thank you. We are happy to bring you peace of mind and certainly would be glad to serve you in the future.
Review
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
Response from CW Mossor Heating and Cooling:
Thank you. It's always a pleasure to assist in making your life more enjoyable and comfortable.
Review
We received great service from Carl on our furnace today! We are ready for what the winter will bring.
Response from CW Mossor Heating and Cooling:
"Thank you for your kind words, Matthew! We're glad we could provide you with great service.
Review
Excellent service and responds to service calls quickly
Response from CW Mossor Heating and Cooling:
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
Review
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.
Review
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.
Review
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!
