One Hour Heating And Air Conditioning Of Northern Va (Aka Modern Mechanical Llc)
HVAC Services in Ashburn
One Hour Heating and Air Conditioning of Northern VA (aka Modern Mechanical LLC) specializes in Carrier HVAC installation, repair, and maintenance. Proudly serving Ashburn and the surrounding areas, we deliver reliable, certified HVAC solutions to meet your home's needs. As your local Carrier Factory Authorized Dealer, your satisfaction is our number one priority. That's why we stand behind our work with a 100% satisfaction guarantee. Equipped with certified technicians, we strive to exceed your expectations, whether performing routine maintenance or installing a new Carrier heating and cooling system.
Experience and Certifications
Experience and Certifications
Past President's Award Winner
The Carrier President's Award is Carrier's highest dealer honor. We have received the award within the past three years. It recognizes us as a Carrier Factory Authorized Dealer who exemplifies leadership, management, customer satisfaction, expertise, business growth, and operational excellence.
Factory Authorized Dealer
As a Carrier Factory Authorized Dealer, we have met Carrier's highest standards for superior skills, service, and we proudly offer a 100% satisfaction guarantee.
NATE Dealer
North American Technician Excellence (NATE) is the leading certification program for HVAC technicians and is the only test supported by the entire industry. We are proud to employ NATE certified technicians.
Cool Cash
We participate in Carrier Cool Cash rebates. With the support of Carrier, during select times of the year Cool Cash rebates might be available when you purchase a qualified Carrier heating and cooling system.
Certified Ductless Pro
As a Carrier Certified Ductless Pro, we met Carrier's criteria to sell, install, service, and maintain your Carrier ductless equipment.
Indoor Air Quality Experts
Proper indoor air quality requires more than an air conditioner. As Carrier Indoor Air Quality Experts, we have completed coursework and passed a comprehensive test to deliver a cleaner, healthier home environment.
Past President's Award Winner
The Carrier President's Award is Carrier's highest dealer honor. We have received the award within the past three years. It recognizes us as a Carrier Factory Authorized Dealer who exemplifies leadership, management, customer satisfaction, expertise, business growth, and operational excellence.Factory Authorized Dealer
As a Carrier Factory Authorized Dealer, we have met Carrier's highest standards for superior skills, service, and we proudly offer a 100% satisfaction guarantee.NATE Dealer
North American Technician Excellence (NATE) is the leading certification program for HVAC technicians and is the only test supported by the entire industry. We are proud to employ NATE certified technicians.Cool Cash
We participate in Carrier Cool Cash rebates. With the support of Carrier, during select times of the year Cool Cash rebates might be available when you purchase a qualified Carrier heating and cooling system.Certified Ductless Pro
As a Carrier Certified Ductless Pro, we met Carrier's criteria to sell, install, service, and maintain your Carrier ductless equipment.Indoor Air Quality Experts
Proper indoor air quality requires more than an air conditioner. As Carrier Indoor Air Quality Experts, we have completed coursework and passed a comprehensive test to deliver a cleaner, healthier home environment.
HVAC Repair and Services
Mini Split Repair
Rely on us for expert ductless mini split repair and service to keep your system running smoothly in every season. Our skilled technicians quickly diagnose issues, make reliable repairs, and optimize performance to ensure efficient comfort in your home.
AC Repair & Service
We specialize in fast, reliable air conditioner repair and service to keep your home cool and comfortable. Whether it’s a minor fix or a major repair, we're here to ensure your AC runs smoothly when you need it most.
Furnace Repair & Service
We provide expert furnace repair and service. Our skilled technicians are ready to quickly diagnose and resolve any issues, keeping your home warm and comfortable year-round.
Heat Pump Repair
Count on us for dependable heat pump repair and service to keep your home comfortable year-round. Our experienced technicians troubleshoot issues, perform timely repairs, and ensure your system is operating at its highest efficiency.
HVAC Maintenance
We offer annual HVAC maintenance to keep your system running efficiently and help prevent unexpected breakdowns. Through a thorough inspection and tune-up, we ensure your heating and cooling system is ready to keep you comfortable all year long.
HVAC Installation Services
Mini Split Installation
As a Carrier Certified Ductless Pro, we are trained specifically to install and service Carrier ductless equipment, ensuring your home stays comfortable year-round with efficient, reliable, and tailored climate solutions.
AC Installation
Enhance your home’s cooling and energy savings with our expert AC installation services. We install high-performance Carrier air conditioners and customize each system to match your home’s needs, helping ensure dependable comfort all summer long.
Furnace Installation
Stay warm and worry-free with our professional furnace installation services. We’ll guide you in selecting the best Carrier furnace for your home and complete the installation with expert care and precision.
Heat Pump Installation
Upgrade your home’s comfort and efficiency with our professional heat pump services. Our team installs top-quality Carrier heat pumps and tailors every system to fit your space, delivering reliable performance through every season.
HVAC System Installation
We provide expert HVAC installation to keep your home comfortable year-round. Whether you're replacing your current system or installing HVAC for the first time, we'll help you choose the right solution for your needs and handle the installation with precision and care.
Trusted HVAC Professional in Ashburn
Verified PurchaseGreat Value and Fantastic service
May 14, 2025
One Hour heating won my business though competitive bidding and provided an exceptionally smooth installation experience. The install team and subsequent service teams have been highly professional and very competent. Very satisfied.
Nicolas
Expertise (5)
Solve Problems (5)
Service (5)
Verified PurchaseHummel Install
April 22, 2025
Excellent work
Joseph
Expertise (5)
Solve Problems (5)
Service (5)
Verified Purchasefind another dealer - this dealer has no customer service and haggles customers
April 16, 2024
Worst customer service. Harasses customer
Mihon
Expertise (1)
Service (1)
Solve Problems (1)
Verified PurchaseAlways great service year after year.
March 12, 2024
I have many years with this team and it's my second carrier install with them. They are very professional, prompt, and neat. I highly recommend them.
Brian
Expertise (5)
Service (5)
Solve Problems (5)
Verified PurchaseGreat Service
January 24, 2024
They worked great and went above and beyond
Dario
Expertise (5)
Service (5)
Solve Problems (5)
Verified PurchaseWonderful people to work with
January 05, 2024
The new heating and air conditioner system that was installed was for my mother. My husband and I have used Modern Mechanical for the past several years and we knew they were the ones to call when my mother's furnace stopped working. Modern Mechanical has always done an excellent job with any service we have needed and we would highly recommend them. Their reps are very kind and respectful and we know they will do the job right.
Daniel
Expertise (5)
Service (5)
Solve Problems (5)
Verified PurchaseNew a/c and furnace. Installation and equipment first rate
December 12, 2023
We are very impressed with Modern Mechanical. They are very businesslike and professional. Communications are excellent.
STEPHEN
Expertise (5)
Service (5)
Solve Problems (5)
Verified PurchaseAmazing service and quick turn-around.
May 31, 2023
Amazing service and extremely knowledgeable
Jamie
Expertise (5)
Service (5)
Solve Problems (5)
Verified PurchaseOutstanding Service
May 30, 2023
Great customer service
Edward
Expertise (5)
Service (5)
Solve Problems (5)
Verified PurchasePoor post sale customer service
May 15, 2023
At the time of the Carrier 5 Ton Variable Speed Infinity Air Handler FE4ANF006L00, the air handler was defective. I was reluctantly told by the installer that the heat element had a module or resistor that was made for a commercial unit and the system failed system checks. The heat from this air handler would not work until this was corrected. The installer could not get a replacement part for several days. When they arrived and installed the replacement module it had the same issue. Another week went by before a third attempt was made. This time it did work. I had to take three days off from work for this installation. The installer (Modern Mechanical) would do nothing to compensate for my time and aggravation. The salesmen stated that "I wanted to let you know that we did not manufacture these units we just put in what is given to us. We understand things happen, maybe the guy who puts this part together was having a bad day who knows!" I don't consider these statements to be an endorsement for the installer or the manufacturer.
Mark
Expertise (2)
Service (2)
Solve Problems (2)
Verified PurchaseMy experience is average.
May 23, 2022
I have a broken door because of maintenance guys trying to open left side. The did not resolve my issue.
TIZIANA
Expertise (4)
Service (3)
Verified PurchaseSuperb job
April 03, 2022
Very professional, courteous, high\-quality installation
SEAN
Expertise (5)
Service (5)
Solve Problems (5)
Verified PurchaseAMAZING Customer Experience
November 10, 2021
One Hour was amazing from the first contact to the final invoice. Everyone along the way was professional, helpful, and knowledgeable! We had several companies out to provide estimates and by far One Hour ranked above their competitors.
Meghan
Expertise (5)
Service (5)
Solve Problems (5)
Verified PurchaseGreat experience with our installer!
September 08, 2021
Modern Mechanical did a super job overall and there technicians in particular explained everything and made the process extremely smooth.
Ray
Expertise (5)
Service (5)
Solve Problems (5)
Verified PurchaseInstallation of an AC/ heating eating Unit at Lansdown Woods.
August 11, 2021
On time, Efficient, Our building Engineers complemented there work and they cleaned up before they called it a day. Mike R
Jeannie
Expertise (5)
Solve Problems (5)
Verified PurchaseKind, knowledgable service
May 20, 2021
Everyone has been so wonderful with this company. We've only had great experiences. We will certainly return for future needs.
THOMAS
Expertise (5)
Service (5)
Solve Problems (5)
Verified PurchaseInnovative Installation
May 20, 2021
Modern Mechanical performed an installation which required thinking outside the box. They removed the previously installed equipment which had been mounted on concrete blocks and plywood then they correctly installed the Carrier unit.
David
Expertise (5)
Service (5)
Solve Problems (5)
Verified PurchaseNothing but the best....
May 13, 2021
Nothing but the best.
John
Expertise (5)
Service (5)
Solve Problems (5)
Verified PurchaseQuality Work
April 01, 2021
Daniel \& Ron were very professional and did quality work. I had positive experience and would recommend them.
Dmytro
Expertise (5)
Service (5)
Solve Problems (5)
Verified PurchaseAshamed product
March 23, 2021
Best quality and affordable cost
Khagendra
Expertise (4)
Service (4)
Solve Problems (4)
Verified PurchaseOutstanding
March 23, 2021
Contractor was very professional from the estimate phase, installation phase and the follow\-up visit to correct a minor installation mistake. Both management and tech staff were extremely professional. Well done!!
Ray
Expertise (5)
Service (5)
Solve Problems (5)
Verified PurchaseHeating/Cooling Installation
March 18, 2021
Excellent Work!
Ed
Expertise (5)
Service (5)
Solve Problems (5)
Verified PurchaseMajor issues with new infinity furnace that took days to resolve while we went without heat. No real communication from anyone.
February 12, 2021
From what I understand Carrier shipped out a new model of the infinity furnace that we ordered with bad inducer motors. Three days after installation the furnace would turn on, ignite, then turn off. Modern Mechanical came out and replaced the inducer motor 3 times but it kept burning out. After several days without any heat on our main floor, which we had to use multiple electric space heaters to keep from freezing, they replaced the motor with a different brand. Since that point the unit has worked but I have very little confidence in this system and really wish we had gone with a different brand. Plus I am dreading the power bill for running 3 electric space heaters all day. While I understand the issue was a manufacturer defect we were left without heat for several days in the middle of 20\-30 degree days. After our last carrier install didn't go well I was very hesitant to do it again and I can now say for sure I will never buy carrier again. Horrible experience.
Eric
Expertise (3)
Service (3)
Solve Problems (3)
Verified PurchaseA Professional, Knowedgeable Team
October 07, 2020
When my a/c broke this summer, I had to replace it quickly during our 90 degree days. Modern Mechanical responded and a new system was installed by their skilled technicians. I would recommend this company.
Gerogia
Expertise (5)
Service (5)
Solve Problems (5)
Verified PurchaseGreat service and product
August 07, 2020
On time and professional. Would definitely utilize again.
Lance
Expertise (5)
Service (5)
Solve Problems (5)
Verified PurchaseGreat overall experience
August 06, 2020
Wonderful experience from estimate, to install, to after service. Highly recommend.
Cindy
Expertise (5)
Service (5)
Solve Problems (5)
Verified PurchaseFrom Start to Finish, a Great Experience
July 16, 2020
From the sales meeting to installation, One Hour Heating \& Air Conditioning was professional and informative. They did a great job installing the furnace and AC.
Douglas
Expertise (5)
Service (5)
Solve Problems (5)