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Thermostat installers and replacers in Chantilly
Mayday HVAC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.
"Provided great service when it was an emergency at my mothers house and got here AC back up and running right away and was also able to service my unit same day. He showed me exactly what was wrong and was very honest and fair with the pricing and repairs. Saved my mother a lot of money!!! He definitely has a customer for life with me. His knowledge and professionalism is excellent!!!! I would recommend him to anyone!"
Mesay B on March 2024
Mayday HVAC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.
"Provided great service when it was an emergency at my mothers house and got here AC back up and running right away and was also able to service my unit same day. He showed me exactly what was wrong and was very honest and fair with the pricing and repairs. Saved my mother a lot of money!!! He definitely has a customer for life with me. His knowledge and professionalism is excellent!!!! I would recommend him to anyone!"
Mesay B on March 2024
Appleton Campbell is the local name you can count on for all of your plumbing, heating, cooling and electrical needs.
"Yes the job was completed and worked. The plumber that they sent out was not professional."
Gail D on February 2025
Appleton Campbell is the local name you can count on for all of your plumbing, heating, cooling and electrical needs.
"Yes the job was completed and worked. The plumber that they sent out was not professional."
Gail D on February 2025
When your business or home comfort system breaks down, you need a solution—fast. At SwiftPro, we help homeowners in Fairfax, VA and across Northern Virginia get back to comfort with reliable, professional service they can trust. As a local, family-owned business, we take pride in doing the job right—with clear communication, upfront pricing, and respect for your time and your home. Whether it's a quick AC repair, a new air conditioning installation, or help with water heaters, heating systems, or full HVAC replacements, we're here to guide you every step of the way. Our expert technicians deliver solutions that are fast, fair, and built to last—because your comfort and peace of mind matter. 📍 Serving Fairfax, Chantilly, Centreville, Herndon, Vienna, Burke, and surrounding Northern Virginia communities. 📅 Schedule your service today and experience the SwiftPro difference—where family values meet five-star service.
"Competent and efficient technician. Owner made sure everything was done properly"
Daniel D on January 2025
When your business or home comfort system breaks down, you need a solution—fast. At SwiftPro, we help homeowners in Fairfax, VA and across Northern Virginia get back to comfort with reliable, professional service they can trust. As a local, family-owned business, we take pride in doing the job right—with clear communication, upfront pricing, and respect for your time and your home. Whether it's a quick AC repair, a new air conditioning installation, or help with water heaters, heating systems, or full HVAC replacements, we're here to guide you every step of the way. Our expert technicians deliver solutions that are fast, fair, and built to last—because your comfort and peace of mind matter. 📍 Serving Fairfax, Chantilly, Centreville, Herndon, Vienna, Burke, and surrounding Northern Virginia communities. 📅 Schedule your service today and experience the SwiftPro difference—where family values meet five-star service.
"Competent and efficient technician. Owner made sure everything was done properly"
Daniel D on January 2025
We provide services to homeowners and businesses throughout Northern Virginia, Washington D.C. and Maryland. We spend time during each call asking questions to fully assess the situation, and are usually able to determine the best course of action before we send a truck out to your home or business. We’ve been in the business of employing the most knowledgeable, professional, attentive, and courteous electricians in all of “DMV”. It’s our attention to service and quality, Each appointment made with one of our clients is set up by one of our experienced electricians.
"Kevin did very excellent and thorough installation of the EV charging outlet."
Yuhong W on March 2025
We provide services to homeowners and businesses throughout Northern Virginia, Washington D.C. and Maryland. We spend time during each call asking questions to fully assess the situation, and are usually able to determine the best course of action before we send a truck out to your home or business. We’ve been in the business of employing the most knowledgeable, professional, attentive, and courteous electricians in all of “DMV”. It’s our attention to service and quality, Each appointment made with one of our clients is set up by one of our experienced electricians.
"Kevin did very excellent and thorough installation of the EV charging outlet."
Yuhong W on March 2025
At SwiftPro, we prioritize your comfort and peace of mind. Serving Fairfax and the greater Northern Virginia area, we offer fast, reliable HVAC and plumbing services tailored to your specific needs. Our expert technicians provide efficient solutions for heating, cooling, water heaters, and more, with a commitment to clear communication and upfront pricing. With a focus on customer-first service, we respect your time and home, delivering honest, high-quality work that gets your space back to optimal comfort quickly. Whether you need a quick repair or a new system installation, SwiftPro is here to help Northern Virginia residents keep their homes running smoothly. Schedule your service today and experience the SwiftPro difference! Call or Text Us Now!
"Courteous, Professional, and Knowledgeable HVAC Installer - Needed to replace a 25+ year old HVAC system in the coldest months of the year and SwiftPro was the right choice. I live in a condo with a tricky indoor/outdoor HVAC set-up. Tyler worked with me to ensure I had the right system that 'fit' in the area left after removing the old system. Workers were completely professional and knowledgeable during installation and dare I say - courteous. Installation was supposed to be same-day, but one part was unavailable at the time. Tyler and his staff hunted across the local area for the part and even sent an employee out to buy a space heater to spare me from the below-20 degree night. Part came in next day and installation was complete. Very satisfied with the outcome of the project."
James B on May 2025
At SwiftPro, we prioritize your comfort and peace of mind. Serving Fairfax and the greater Northern Virginia area, we offer fast, reliable HVAC and plumbing services tailored to your specific needs. Our expert technicians provide efficient solutions for heating, cooling, water heaters, and more, with a commitment to clear communication and upfront pricing. With a focus on customer-first service, we respect your time and home, delivering honest, high-quality work that gets your space back to optimal comfort quickly. Whether you need a quick repair or a new system installation, SwiftPro is here to help Northern Virginia residents keep their homes running smoothly. Schedule your service today and experience the SwiftPro difference! Call or Text Us Now!
"Courteous, Professional, and Knowledgeable HVAC Installer - Needed to replace a 25+ year old HVAC system in the coldest months of the year and SwiftPro was the right choice. I live in a condo with a tricky indoor/outdoor HVAC set-up. Tyler worked with me to ensure I had the right system that 'fit' in the area left after removing the old system. Workers were completely professional and knowledgeable during installation and dare I say - courteous. Installation was supposed to be same-day, but one part was unavailable at the time. Tyler and his staff hunted across the local area for the part and even sent an employee out to buy a space heater to spare me from the below-20 degree night. Part came in next day and installation was complete. Very satisfied with the outcome of the project."
James B on May 2025
Call today for FREE Estimates for new heating and cooling systems, water heaters, water filtration and electrical panels and whole home generators. Founded in 1976 by Jim Appleton, grandfather of current President Mike Appleton—Appleton Campbell has remained a locally owned and operated business dedicated to their customers, employees and communities. Honesty, integrity, and experience are the cornerstones on which Appleton Campbell was built and on which it continues to grow today. Committed to outstanding customer service Appleton Campbell provides: - Highly trained technicians who treat you and your home with courtesy and respect - Flat-rate pricing—the price you are quoted up front is the price you will pay—there are no surprises - Guaranteed service and customer satisfaction
"Being a MVP customer was time for Heating/Cooling safety inspections. Kevin Stanley was the HVAC Service Tech assigned to the job. He went over a few issues on our older unit he found during his inspection. I never felt pressured to have the work done and so glad he resolved them on the same day. He definitely went out of his way doing a great job. He explained everything to me that he was doing and also answering all the questions I had. The price was reasonable. Will definitely call Appleton Campbell when needing home repairs, this is our 3rd project they’ve taken care of. Thanks again"
cindy s on May 2025
Call today for FREE Estimates for new heating and cooling systems, water heaters, water filtration and electrical panels and whole home generators. Founded in 1976 by Jim Appleton, grandfather of current President Mike Appleton—Appleton Campbell has remained a locally owned and operated business dedicated to their customers, employees and communities. Honesty, integrity, and experience are the cornerstones on which Appleton Campbell was built and on which it continues to grow today. Committed to outstanding customer service Appleton Campbell provides: - Highly trained technicians who treat you and your home with courtesy and respect - Flat-rate pricing—the price you are quoted up front is the price you will pay—there are no surprises - Guaranteed service and customer satisfaction
"Being a MVP customer was time for Heating/Cooling safety inspections. Kevin Stanley was the HVAC Service Tech assigned to the job. He went over a few issues on our older unit he found during his inspection. I never felt pressured to have the work done and so glad he resolved them on the same day. He definitely went out of his way doing a great job. He explained everything to me that he was doing and also answering all the questions I had. The price was reasonable. Will definitely call Appleton Campbell when needing home repairs, this is our 3rd project they’ve taken care of. Thanks again"
cindy s on May 2025
Family owned and operated. We’ll get the job done right and in a timely manner. We respect your home, from the planning stages of an installation to cleanliness during any visit. We respect your busy schedule and punctuality is important to us. That is why we’ve made a commitment to be local. We respect your trust. That is why we work efficiently and at the very highest standard for our customers, and we stand by our work. Ask your neighbours about their experience with Polar Bear Air Conditioning & Heating. It will be our pleasure to do business with you.
"Joe was clearly very experienced with knowledgeable about old row houses like mine, and he gave me a ton of confidence in his professional opinion. His quote was also very affordable, and we are happy with the work his guys did installing a new central AC system in our home."
Sarah D on February 2025
Family owned and operated. We’ll get the job done right and in a timely manner. We respect your home, from the planning stages of an installation to cleanliness during any visit. We respect your busy schedule and punctuality is important to us. That is why we’ve made a commitment to be local. We respect your trust. That is why we work efficiently and at the very highest standard for our customers, and we stand by our work. Ask your neighbours about their experience with Polar Bear Air Conditioning & Heating. It will be our pleasure to do business with you.
"Joe was clearly very experienced with knowledgeable about old row houses like mine, and he gave me a ton of confidence in his professional opinion. His quote was also very affordable, and we are happy with the work his guys did installing a new central AC system in our home."
Sarah D on February 2025
Family owned & operated. Financing available. Credit cards. All work done by experienced professionals to ensure consistent high quality. Award winning company at your service.
"Snell installed our new HVAC and we were initially pleased. However, the unit failed a county inspection. When Snell reached out to set up a repair, our window was 10am-2pm. The technician showed up at 4pm without the materials he needed. He promptly left having done nothing, said he would get what he needed and return. We heard nothing."
Dian B on August 2024
Family owned & operated. Financing available. Credit cards. All work done by experienced professionals to ensure consistent high quality. Award winning company at your service.
"Snell installed our new HVAC and we were initially pleased. However, the unit failed a county inspection. When Snell reached out to set up a repair, our window was 10am-2pm. The technician showed up at 4pm without the materials he needed. He promptly left having done nothing, said he would get what he needed and return. We heard nothing."
Dian B on August 2024
F.H. Furr provides residential products and services in the plumbing, heating, air conditioning, and electrical business. They put their customers first and provide them with quality products from trained technicians. F.H. Furr has committed to the highest degree of professional development and training in the industry, to work diligently in exceeding every expectation of the client in need. Based out of Manassas, Va., the company has expanded throughout Northern Va., Rockville, Md., Fredericksburg, and Richmond, Va. Whether you need plumbing, heating, cooling, or electrical repairs or replacements, call on F.H. Furr for "Absolutely The Best" service!
"I contacted FH Furr because my HVAC ( a Trane XV80) which is less than 5 years old had stopped working. Specifically, the indoor unit would not blow; the compressor worked just fine and was producing cold air. The technician, Jarib Badia, arrived at 10 AM and told me that the unit had a defective blower motor that was likely damaged by a power surge and that Trane would not cover the replacement because it was an Act of God. He then said I needed to spend 3000 dollars on a new motor. I reluctantly agreed to the repair because I needed the HVAC fixed even though the technician’s hypothesis that a power surge caused the damage appeared to lack any evidence. Nevertheless, the technician proceeded to spend 10 HOURS trying to fix the HVAC, even after he replaced the supposedly damaged blower motor. At the end of the day, he admitted that he didn’t have the unit completely fixed but that he was able to get the unit to cycle on low speed. He said he would need additional parts in the AM to completely fix it but that the unit was properly cycling. Nothing could be farther from the truth. After he left at 7:45 PM, I noticed that the HVAC blower motor was not turning off, even when the compressor shut off after the thermostat reached proper temperature. I turned the system to the “off” setting in hopes of getting the blower motor to shut off. This did not work. I now had an HVAC with a constant on blower motor. The only way to shut off the blower motor was to turn off the entire system at the circuit breaker. I immediately called FH Furr to tell them that their technician had totally botched the repair after charging me 3700 dollars and wasting 10 hours of my day. I was told that they could not send a technician until the morning and that a service manager would call me. I have yet to receive that phone call. So I now have an HVAC that is in worse than when the day started and I am out 3700 dollars. I need FH Furr to fix their botched repair or issue a refund."
Chris T on May 2025
F.H. Furr provides residential products and services in the plumbing, heating, air conditioning, and electrical business. They put their customers first and provide them with quality products from trained technicians. F.H. Furr has committed to the highest degree of professional development and training in the industry, to work diligently in exceeding every expectation of the client in need. Based out of Manassas, Va., the company has expanded throughout Northern Va., Rockville, Md., Fredericksburg, and Richmond, Va. Whether you need plumbing, heating, cooling, or electrical repairs or replacements, call on F.H. Furr for "Absolutely The Best" service!
"I contacted FH Furr because my HVAC ( a Trane XV80) which is less than 5 years old had stopped working. Specifically, the indoor unit would not blow; the compressor worked just fine and was producing cold air. The technician, Jarib Badia, arrived at 10 AM and told me that the unit had a defective blower motor that was likely damaged by a power surge and that Trane would not cover the replacement because it was an Act of God. He then said I needed to spend 3000 dollars on a new motor. I reluctantly agreed to the repair because I needed the HVAC fixed even though the technician’s hypothesis that a power surge caused the damage appeared to lack any evidence. Nevertheless, the technician proceeded to spend 10 HOURS trying to fix the HVAC, even after he replaced the supposedly damaged blower motor. At the end of the day, he admitted that he didn’t have the unit completely fixed but that he was able to get the unit to cycle on low speed. He said he would need additional parts in the AM to completely fix it but that the unit was properly cycling. Nothing could be farther from the truth. After he left at 7:45 PM, I noticed that the HVAC blower motor was not turning off, even when the compressor shut off after the thermostat reached proper temperature. I turned the system to the “off” setting in hopes of getting the blower motor to shut off. This did not work. I now had an HVAC with a constant on blower motor. The only way to shut off the blower motor was to turn off the entire system at the circuit breaker. I immediately called FH Furr to tell them that their technician had totally botched the repair after charging me 3700 dollars and wasting 10 hours of my day. I was told that they could not send a technician until the morning and that a service manager would call me. I have yet to receive that phone call. So I now have an HVAC that is in worse than when the day started and I am out 3700 dollars. I need FH Furr to fix their botched repair or issue a refund."
Chris T on May 2025
Relax HVAC, Inc. is a fully insured and licensed heating and air conditioning firm in Ashburn, Virginia, composed of Master Technicians led by Kamal. He and his team provide round-the-clock emergency services for residential and commercial customers, including those in the Iranian, Arabic, and Palestinian communities. With more than 25 years of experience in providing air conditioning services, Kamal takes pride in making customers feel good about his company. He does this by giving them quality and honest services at great prices. His services are approved and recommended by the Loudoun County Fire Department.
"My AC failed and I had limited time to find a good solution, I made a phone call to Relax HVAC based on the online reviews and it was a great decision. Nasser came to check the situation, he gave a very detailed and comprehensive overview of the situation and provided with the options I had. I decided to replace the unit, Nasser went above and beyond to find a unit delivery service but there was nothing available over the weekend so this gentleman went for unit pick up himself and finished the installation within a day from my initial call. Moreover, the provided price was very reasonable.I can't be more happy with the outcome and highly recommend Relax HVAC"
Navid P on July 2024
Relax HVAC, Inc. is a fully insured and licensed heating and air conditioning firm in Ashburn, Virginia, composed of Master Technicians led by Kamal. He and his team provide round-the-clock emergency services for residential and commercial customers, including those in the Iranian, Arabic, and Palestinian communities. With more than 25 years of experience in providing air conditioning services, Kamal takes pride in making customers feel good about his company. He does this by giving them quality and honest services at great prices. His services are approved and recommended by the Loudoun County Fire Department.
"My AC failed and I had limited time to find a good solution, I made a phone call to Relax HVAC based on the online reviews and it was a great decision. Nasser came to check the situation, he gave a very detailed and comprehensive overview of the situation and provided with the options I had. I decided to replace the unit, Nasser went above and beyond to find a unit delivery service but there was nothing available over the weekend so this gentleman went for unit pick up himself and finished the installation within a day from my initial call. Moreover, the provided price was very reasonable.I can't be more happy with the outcome and highly recommend Relax HVAC"
Navid P on July 2024
Thermostat installations and replacements FAQs
It's often worth replacing your old thermostat with a newer model that can enhance your home's comfort and energy efficiency. Upgrading to a programmable or smart thermostat can save you up to $200 per year on energy bills. Plus, smart thermostats offer convenient features like remote control and learning capabilities, making your home more comfortable and easier to manage.
Signs of a bad thermostat include your HVAC system not turning on when it's supposed to or failing to reach the desired temperature. If the thermostat's display is blank or not functioning properly, it could be malfunctioning. Another indicator is the HVAC system running continuously without shutting off or cycling on and off too frequently. You might also notice uneven temperatures throughout your home, with some rooms being too warm or too cold. These issues suggest that the thermostat is failing and may need repair or replacement to ensure your HVAC system operates efficiently.
A thermostat should last between 10 to 20 years, depending on its quality and how well it's maintained. Over time, dust, wiring issues, and general wear can affect its performance. Even if a thermostat is still functioning after 10 years, you might choose to replace it to take advantage of newer energy-saving technologies and smart home integrations. Upgrading to a modern thermostat can improve efficiency, offer more control over your home's climate, and potentially lower energy bills.
The number of thermostats you need depends on your home's size, layout, and heating and cooling zones. In a standard single-zone HVAC system, one thermostat controls the temperature for the entire home. However, larger homes or those with multiple floors might benefit from multiple thermostats linked to a multi-zone HVAC system. This setup can offer better comfort and energy efficiency: It lets you customize the temperature in different areas, so you're only heating or cooling the spaces you're using.
Replacing a thermostat typically takes a professional technician about one to two hours to complete. If you're swapping out an existing thermostat for a similar model with compatible wiring, the process can be done in less than an hour. However, installing a new thermostat that requires additional wiring, such as a smart thermostat, or moving the thermostat to a new location can extend the time to two hours or more. Complex installations may also involve cutting into drywall or integrating with other home systems, which can add to the duration.
There are a few things that can cause your home thermostat to fail. The most simple one is age and cleanliness. Dirt, grease, dust, and other small particles can clog sensors and cause malfunctions in readings. You may also have a failing power supply and loose connections, and the simplest cause is that it isn't installed in the right place in your home so it can't properly sense air temperature. Repairing a thermostat costs around $210.
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