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Thermostat installers and replacers in Haymarket

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
22 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


Avatar for Appleton Campbell, Inc.
Appleton Campbell, Inc.
285 Alwington Blvd
4.70(
46
)
Approved Pro
Appleton Campbell, Inc.
285 Alwington Blvd
4.70(
46
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
130 local quotes requested

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


Avatar for SwiftPro
SwiftPro
11350 Random Hills Rd, Suite 886
5.00(
9
)
Approved Pro
SwiftPro
11350 Random Hills Rd, Suite 886
5.00(
9
)
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 REO-SERVICEPRO, INC
REO-SERVICEPRO, INC
25571 Soft Mist Terrace
5.00(
38
)
Approved Pro
REO-SERVICEPRO, INC
25571 Soft Mist Terrace
5.00(
38
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1302 local quotes requested

REO-ServicePro, Inc. is a Virginia Class A Contractor. We provide a wide range of services that will enhance the value, appeal and quality of your home. Services included everything from repairs to a custom bathroom or kitchen, we do it all.

"These guys got the work done in a single long day, which was impressive. It was well done and the owner was very responsive. Really appreciated having a pro for playground equipment install that was a Class A contractor with all the insurance and licenses I was looking for."

Justin K on March 2025

REO-ServicePro, Inc. is a Virginia Class A Contractor. We provide a wide range of services that will enhance the value, appeal and quality of your home. Services included everything from repairs to a custom bathroom or kitchen, we do it all.

"These guys got the work done in a single long day, which was impressive. It was well done and the owner was very responsive. Really appreciated having a pro for playground equipment install that was a Class A contractor with all the insurance and licenses I was looking for."

Justin K on March 2025


Avatar for Powerhouse Homeimprovement
Powerhouse Homeimprovement
771 General Wallace Court
4.33(
6
)
Approved Pro
Powerhouse Homeimprovement
771 General Wallace Court
4.33(
6
)
Approved Pro
Customers say: Super punctual
5 years of experience
Free onsite estimate

Quality work and attention to detail and affordable prices. We are dedicated to providing good customer service to homeowners so that they are happy. Please see some of the services we offer below and call -or- click to schedule a free estimate today!

"This dude shows up on time, 5/5 on that. Leaves 10 minutes later without saying a word. I message him 3 hours later asking if we were still doing the job. 2 hours after that he messaged back saying he had his helpers cancel and we need to reschedule. I ask when he's thinking we can get it done. 3 days later I haven't heard back. I open a new project on Angi, and re-select this same guy by mistake. He replies promptly, gets all the details, and then once he gets my email no further contact. It feels like there's something personal here, or maybe he quoted too low for the project, but in any case I literally cannot imagine a less professional way of handling this whole situation. My guess is that he showed up to the job to scope it out, then went to find a couple day laborers to actually do the work. Maybe he couldn't find any, maybe he realized that this job was too big. In either case, just say so. Jesus."

Justin K on March 2025

Quality work and attention to detail and affordable prices. We are dedicated to providing good customer service to homeowners so that they are happy. Please see some of the services we offer below and call -or- click to schedule a free estimate today!

"This dude shows up on time, 5/5 on that. Leaves 10 minutes later without saying a word. I message him 3 hours later asking if we were still doing the job. 2 hours after that he messaged back saying he had his helpers cancel and we need to reschedule. I ask when he's thinking we can get it done. 3 days later I haven't heard back. I open a new project on Angi, and re-select this same guy by mistake. He replies promptly, gets all the details, and then once he gets my email no further contact. It feels like there's something personal here, or maybe he quoted too low for the project, but in any case I literally cannot imagine a less professional way of handling this whole situation. My guess is that he showed up to the job to scope it out, then went to find a couple day laborers to actually do the work. Maybe he couldn't find any, maybe he realized that this job was too big. In either case, just say so. Jesus."

Justin K on March 2025


Avatar for King General Contracting
King General Contracting
P.O. Box 1904
4.78(
36
)
Approved Pro
King General Contracting
P.O. Box 1904
4.78(
36
)
Approved Pro
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
1290 local quotes requested

Our services include: painting (interior & exterior), shingles (repair and replace), siding, vinyl, drywall, fencing, decks and more! We accept credit cards and also have coupons on our web site. We have 3 crews to cover a 100 mile radius. For the most prompt service, please call us directly at our main number. We look forward to hearing from you! Please visit us at https://kingconstructions.com/

"I liked Oscar and was happy with the finished product, he did additional work/fixes when I requested and at reasonable costs. I would hire them again. Make sure you have a detailed scope and discuss on site prior to starting, that would have saved both of us time on this project."

justin f on October 2022

Our services include: painting (interior & exterior), shingles (repair and replace), siding, vinyl, drywall, fencing, decks and more! We accept credit cards and also have coupons on our web site. We have 3 crews to cover a 100 mile radius. For the most prompt service, please call us directly at our main number. We look forward to hearing from you! Please visit us at https://kingconstructions.com/

"I liked Oscar and was happy with the finished product, he did additional work/fixes when I requested and at reasonable costs. I would hire them again. Make sure you have a detailed scope and discuss on site prior to starting, that would have saved both of us time on this project."

justin f on October 2022


Avatar for The Doctor House, LLC
The Doctor House, LLC
9290 Towerside Dr
4.56(
126
)
Approved Pro
The Doctor House, LLC
9290 Towerside Dr
4.56(
126
)
Approved Pro
Customers say: Quality work
880 local quotes requested
19 years of experience

The Doctor House, Handyman, we can do almost everything, using good materials, no job is to small if we can't do we have a business partners and we can help you with your Home Improvement or your HONEY DO LIST, also we am do interior and exterior painting, drywall repair and hanging, finishing, roof repair, light electric, and light pluming, deck repair, kitchen, basements, laundry rooms, and much more.

"Carlos was very friendly and knowledgeable. I will use him for a future project."

Liam T on April 2025

The Doctor House, Handyman, we can do almost everything, using good materials, no job is to small if we can't do we have a business partners and we can help you with your Home Improvement or your HONEY DO LIST, also we am do interior and exterior painting, drywall repair and hanging, finishing, roof repair, light electric, and light pluming, deck repair, kitchen, basements, laundry rooms, and much more.

"Carlos was very friendly and knowledgeable. I will use him for a future project."

Liam T on April 2025


Avatar for JW Home Improvement
JW Home Improvement
849 Quince Orchard Blvd
4.39(
5,499
)
Approved Pro
JW Home Improvement
849 Quince Orchard Blvd
4.39(
5,499
)
Approved Pro
Customers say: Quality work
7536 local quotes requested
24 years of experience

JWHI provides world-class customer service with consistent and superior workmanship. We strive to be the trusted market leader in the home improvement industry. Proudly, we are Super Service Award Winner for over a decade, and we plan to keep that streak going! Contact us today to discuss your next handyman or remodeling project. Our mission is to provide you with a happy home improvement experience!

"Fine it was fine"

Jonathan S on April 2025

JWHI provides world-class customer service with consistent and superior workmanship. We strive to be the trusted market leader in the home improvement industry. Proudly, we are Super Service Award Winner for over a decade, and we plan to keep that streak going! Contact us today to discuss your next handyman or remodeling project. Our mission is to provide you with a happy home improvement experience!

"Fine it was fine"

Jonathan S on April 2025


Avatar for Zee Servicing LLC
Zee Servicing LLC
New on HomeAdvisorNew on Angi
Approved Pro
Zee Servicing LLC
New on AngiNew on HomeAdvisor
Approved Pro
9 years of experience
Free onsite estimate

We are specialized in all type of maintenance, repairs, and remodeling, plumbing, drywall, painting and carpentry projects in DMV area. Our expert handyman are always ready around the clock to handle all of your needs on timely and professional manner. Zee Servicing LLC also do basement framing, kitchen and bathroom remodeling too.

We are specialized in all type of maintenance, repairs, and remodeling, plumbing, drywall, painting and carpentry projects in DMV area. Our expert handyman are always ready around the clock to handle all of your needs on timely and professional manner. Zee Servicing LLC also do basement framing, kitchen and bathroom remodeling too.


Avatar for A & V Handyman, LLC
A & V Handyman, LLC
5.00(
14
)
Approved Pro
A & V Handyman, LLC
5.00(
14
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
851 local quotes requested

Hello!!! I’m Alex Ruffing, welcome to my page! I’m a born & raised Northern Virginian with 19 years in construction services (and counting). I started young, with family, on area commercial jobs; Wolftrap, Metro Garages and Park & Rides, and many of our shopping plazas. Then spent some time traveling the east coast building in the industrial sector; concrete, sky rises. Now I am happy to be home and operating as a Handyman(+). Handyman because I mostly operate independently, preforming all kinds of repair and remodeling opportunities. (+) because I am well connected with reputable tradespeople in the area, and I always happy to discuss larger residential projects; backyard pavilions, outdoor kitchens, shotcrete pools, additions, movie theaters, bars, and wine cellars. My cell phone is (571)320-8605. Do not hesitate to call or text so we can discuss solutions regarding your home’s next repair, remodel, or improvement. With best wishes, thank you. I look forward to hearing from you.

"The work was excellent, and Alex was very personable. He explained everything he planned to do. He showed up when scheduled, and communicated everything. He also took the time to research what paint/stain would be best, and waited for the best time to apply it. He was quick and efficient, and the job came out perfectly, and exceeded our original expectations. We plan to have him back in the spring to do some house trim repair. If you need a handyman, hire Alex. You won't be disappointed."

Steve P on October 2024

Hello!!! I’m Alex Ruffing, welcome to my page! I’m a born & raised Northern Virginian with 19 years in construction services (and counting). I started young, with family, on area commercial jobs; Wolftrap, Metro Garages and Park & Rides, and many of our shopping plazas. Then spent some time traveling the east coast building in the industrial sector; concrete, sky rises. Now I am happy to be home and operating as a Handyman(+). Handyman because I mostly operate independently, preforming all kinds of repair and remodeling opportunities. (+) because I am well connected with reputable tradespeople in the area, and I always happy to discuss larger residential projects; backyard pavilions, outdoor kitchens, shotcrete pools, additions, movie theaters, bars, and wine cellars. My cell phone is (571)320-8605. Do not hesitate to call or text so we can discuss solutions regarding your home’s next repair, remodel, or improvement. With best wishes, thank you. I look forward to hearing from you.

"The work was excellent, and Alex was very personable. He explained everything he planned to do. He showed up when scheduled, and communicated everything. He also took the time to research what paint/stain would be best, and waited for the best time to apply it. He was quick and efficient, and the job came out perfectly, and exceeded our original expectations. We plan to have him back in the spring to do some house trim repair. If you need a handyman, hire Alex. You won't be disappointed."

Steve P on October 2024

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Showing 1-10 of 903

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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