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Thermostat installers and replacers in Arlington

Mayday HVAC, LLC
6503 TOWER DR APT 103
5.00(
3
)
Approved Pro
Mayday HVAC, LLC
6503 TOWER DR APT 103
5.00(
3
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
6 years of experience

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


Avatar for SwiftPro
SwiftPro
11350 Random Hills Rd, Suite 886
5.00(
14
)
Approved Pro
SwiftPro
11350 Random Hills Rd, Suite 886
5.00(
14
)
Approved Pro
Customers say: Quick response
1 years of experience
Free onsite estimate

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


Avatar for Elements Of Energy L.L.C.
Elements Of Energy L.L.C.
8913 Canberra Dr
5.00(
11
)
Approved Pro
Elements Of Energy L.L.C.
8913 Canberra Dr
5.00(
11
)
Approved Pro
Super Service Award
Customers say: Quick response
23 local quotes requested
3 years of experience

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


BlueStar Air Mechanical Inc.
11092 Lee Hwy
4.85(
26
)
Approved Pro
BlueStar Air Mechanical Inc.
11092 Lee Hwy
4.85(
26
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
575 local quotes requested

BlueStar Air Mechanical is a call away for your repair, maintenance and installation needs. We specialize in fixing and tuning up cooling, heating and plumbing systems for both residential homes and commercial establishments.

"I contacted Bluestar Air Mechanical for a second opinion after an appointment with Air One. I have a Carrier HVAC system, and the Air One technician recommended a complete system replacement, claiming the blower was bad, the furnace control board needed replacing, and that there were other issues. Since replacing the HVAC is a big investment, I wanted to get a second opinion. It was only after comparing the service from Bluestar that I realized Air One may have been pushing for a new system sale or lacked the expertise to properly diagnose and repair the actual problems. Isaac, the technician from Bluestar, spent about an hour thoroughly diagnosing and fixing the issues. He found burnt wiring in the furnace and discovered that the wrong capacitor had been incorrectly installed in the AC. Isaac replaced the burnt wiring in the furnace and the capacitor in the AC. After these repairs, my Carrier system was back up and running—without the need for a costly replacement. Bluestar, and Isaac in particular, demonstrated professionalism, expertise, and honesty. They focused on resolving the actual issues instead of pushing for an unnecessary system replacement. I highly recommend Bluestar for their reliable service and Isaac’s thorough and knowledgeable work."

James C on October 2024

BlueStar Air Mechanical is a call away for your repair, maintenance and installation needs. We specialize in fixing and tuning up cooling, heating and plumbing systems for both residential homes and commercial establishments.

"I contacted Bluestar Air Mechanical for a second opinion after an appointment with Air One. I have a Carrier HVAC system, and the Air One technician recommended a complete system replacement, claiming the blower was bad, the furnace control board needed replacing, and that there were other issues. Since replacing the HVAC is a big investment, I wanted to get a second opinion. It was only after comparing the service from Bluestar that I realized Air One may have been pushing for a new system sale or lacked the expertise to properly diagnose and repair the actual problems. Isaac, the technician from Bluestar, spent about an hour thoroughly diagnosing and fixing the issues. He found burnt wiring in the furnace and discovered that the wrong capacitor had been incorrectly installed in the AC. Isaac replaced the burnt wiring in the furnace and the capacitor in the AC. After these repairs, my Carrier system was back up and running—without the need for a costly replacement. Bluestar, and Isaac in particular, demonstrated professionalism, expertise, and honesty. They focused on resolving the actual issues instead of pushing for an unnecessary system replacement. I highly recommend Bluestar for their reliable service and Isaac’s thorough and knowledgeable work."

James C on October 2024


Avatar for Appleton Campbell
Appleton Campbell
285 Alwington Blvd
4.64(
320
)
Approved Pro
Appleton Campbell
285 Alwington Blvd
4.64(
320
)
Approved Pro
Customers say: Quick response
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
1055 local quotes requested

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


Avatar for Modern Mechanical
Modern Mechanical
21730 Red Rum Dr
4.33(
43
)
Approved Pro
Modern Mechanical
21730 Red Rum Dr
4.33(
43
)
Approved Pro
Customers say: Super punctual
793 local quotes requested
16 years of experience

Modern Mechanical is your trusted partner for all your heating and A/C needs in Washington D.C. With our Virginia Class A License 2705 134143A, we are committed to providing top-notch service and expertise. Contact us today for all your home comfort needs.

"I have been a customer for a very long time and this scheduled maintenance and dryer vent cleaning was done by Cesar. I have to say he is one very thorough technician and I was very pleased with his inspection and vent cleaning. His service was so different than some of the ones I've had before. I even had one inspector tell me he didn't need to check in my attic which houses one of our two units. Let me tell you about Cesar, he even cleaned up behind my dryer for me. This is something that is rare in customer service. I have my HVAC seasonally maintenanced and never had a inspector be as thorough as him. The pictures he took and explained to me and the one problem he found that no other inspector had found in all this time. I tried to spare him from the attic heat for the repair and have him return on another day in the morning but he didn't mind going back in there to fix the problem for us although it was in the dead heat of the day. I just hope the company sees this review and knows what a good technician they have in Cesar."

Deborah M on August 2023

Modern Mechanical is your trusted partner for all your heating and A/C needs in Washington D.C. With our Virginia Class A License 2705 134143A, we are committed to providing top-notch service and expertise. Contact us today for all your home comfort needs.

"I have been a customer for a very long time and this scheduled maintenance and dryer vent cleaning was done by Cesar. I have to say he is one very thorough technician and I was very pleased with his inspection and vent cleaning. His service was so different than some of the ones I've had before. I even had one inspector tell me he didn't need to check in my attic which houses one of our two units. Let me tell you about Cesar, he even cleaned up behind my dryer for me. This is something that is rare in customer service. I have my HVAC seasonally maintenanced and never had a inspector be as thorough as him. The pictures he took and explained to me and the one problem he found that no other inspector had found in all this time. I tried to spare him from the attic heat for the repair and have him return on another day in the morning but he didn't mind going back in there to fix the problem for us although it was in the dead heat of the day. I just hope the company sees this review and knows what a good technician they have in Cesar."

Deborah M on August 2023


Oliver Home Services
123 Main St.
5.00(
1
)
Approved Pro
Oliver Home Services
123 Main St.
5.00(
1
)
Approved Pro
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1 years of experience

We specialize in Handyman Services: TV installation Curtain Rod Hanging Picture Hanging Emergency Roof Tarping Roof Inspections Storm Restoration Roofing We pride ourselves on the quality work we provide, while delivering great customer service. Call - or - Click to schedule an appointment today!

"John did an excellent job of documenting storm damages to my roof and making the argument for a full roof replacement with insurance. He was professional, on-time, and very knowledgeable."

Madhu R on June 2024

We specialize in Handyman Services: TV installation Curtain Rod Hanging Picture Hanging Emergency Roof Tarping Roof Inspections Storm Restoration Roofing We pride ourselves on the quality work we provide, while delivering great customer service. Call - or - Click to schedule an appointment today!

"John did an excellent job of documenting storm damages to my roof and making the argument for a full roof replacement with insurance. He was professional, on-time, and very knowledgeable."

Madhu R on June 2024


Avatar for J&M Mheet Metal inc
J&M Mheet Metal inc
New on HomeAdvisorNew on Angi
Approved Pro
J&M Mheet Metal inc
New on AngiNew on HomeAdvisor
Approved Pro
910 local quotes requested
20 years of experience

In need for a local handy man to fix your home problems? Or maybe you're looking for someone to do your interior/ exterior work in your home? We are here to help! Our purpose for this company is to ensure high quality, trustworthy, and professional work. Tambien se tabla Español!!!

In need for a local handy man to fix your home problems? Or maybe you're looking for someone to do your interior/ exterior work in your home? We are here to help! Our purpose for this company is to ensure high quality, trustworthy, and professional work. Tambien se tabla Español!!!


Avatar for CIC
CIC
5.00(
14
)
Approved Pro
CIC
5.00(
14
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1086 local quotes requested

Our mission is to be a handyman that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. We won't leave until the job is done right! Call or click to schedule an estimate today!

"They replaced three large screens on our deck. He recommended using heavier gauge screen and attaching the screen more securely. The entire job was done professionally, on budget and on time. We were very pleased"

Dan g on April 2024

Our mission is to be a handyman that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. We won't leave until the job is done right! Call or click to schedule an estimate today!

"They replaced three large screens on our deck. He recommended using heavier gauge screen and attaching the screen more securely. The entire job was done professionally, on budget and on time. We were very pleased"

Dan g on April 2024


Avatar for McCrea Heating & Air Conditioning Services of VA
McCrea Heating & Air Conditioning Services of VA
5083 Lee Hwy
4.57(
363
)
Approved Pro
McCrea Heating & Air Conditioning Services of VA
5083 Lee Hwy
4.57(
363
)
Approved Pro
Customers say: Super punctual
1196 local quotes requested
89 years of experience

McCrea is a family owned business that has served our area since 1936. Financing and rebates are available on Trane systems installed by McCrea. Resistrictions apply and these are limited time offers call for details. "Its hard to stop a Trane"

"McCrea has been servicing my home unit for 9 years and every service appointment has been timely and informative. Scott has been the technician on-site for this period of time and he is outstanding; knowledgeable, personable, interactive and thorough with his inspections."

Tom S on April 2024

McCrea is a family owned business that has served our area since 1936. Financing and rebates are available on Trane systems installed by McCrea. Resistrictions apply and these are limited time offers call for details. "Its hard to stop a Trane"

"McCrea has been servicing my home unit for 9 years and every service appointment has been timely and informative. Scott has been the technician on-site for this period of time and he is outstanding; knowledgeable, personable, interactive and thorough with his inspections."

Tom S on April 2024

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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.

The homeowners guide to thermostat installations and replacements
From average costs to expert advice, get all the answers you need to get your job done.
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