Top-rated thermostat installers and replacers.

Get matched with top thermostat installers and replacers in your area

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Thermostat installers and replacers in Williamstown

Avatar for Harris Plumbing, Heating, Air & Electrical
Harris Plumbing, Heating, Air & Electrical
38 Cooper Street, Unit 204
4.47(
16
)
Approved Pro
Harris Plumbing, Heating, Air & Electrical
38 Cooper Street, Unit 204
4.47(
16
)
Approved Pro
Customers say: Quick response
343 local quotes requested
37 years of experience

Harris Plumbing, Heating, Air & Electrical is proud to be a locally owned and operated business that has been serving the community since 1988! With years of experience and unmatched expertise, we can help with any and all of your HVAC, Plumbing and Electrical needs. Since opening our doors we have built our business on providing our customers with the highest quality products and service at a fair price. From installations to service, you can count on our techs to be timely, tidy, and when the job is done, that you will be 100% satisfied with the work. Let us show you the Harris way, get in touch today!

"Where do I start... First to know this company is not BBB accredited. Contacted Harris as I was having A/C trouble in the middle of a heat wave. A representative promptly came out did a quick evaluation and stated it would be best to replace the unit instead of basically putting a stop gap to fix the problem. I agreed on what needed to be replaced and at the time was appreciative of the prompt service. Additional work had to be installed downstairs to update what was an older configuration of the home. Unfortunately, nothing was addressed upstairs in any of the rooms. Air vents, returns, flow system. The representative reached out to finance and I agreed basically over the phone and via mobile device to approve for terms of the transaction and work. The finance representative did not come out to my home which I was told by Harris should not have happened."

Don E on January 2025

Harris Plumbing, Heating, Air & Electrical is proud to be a locally owned and operated business that has been serving the community since 1988! With years of experience and unmatched expertise, we can help with any and all of your HVAC, Plumbing and Electrical needs. Since opening our doors we have built our business on providing our customers with the highest quality products and service at a fair price. From installations to service, you can count on our techs to be timely, tidy, and when the job is done, that you will be 100% satisfied with the work. Let us show you the Harris way, get in touch today!

"Where do I start... First to know this company is not BBB accredited. Contacted Harris as I was having A/C trouble in the middle of a heat wave. A representative promptly came out did a quick evaluation and stated it would be best to replace the unit instead of basically putting a stop gap to fix the problem. I agreed on what needed to be replaced and at the time was appreciative of the prompt service. Additional work had to be installed downstairs to update what was an older configuration of the home. Unfortunately, nothing was addressed upstairs in any of the rooms. Air vents, returns, flow system. The representative reached out to finance and I agreed basically over the phone and via mobile device to approve for terms of the transaction and work. The finance representative did not come out to my home which I was told by Harris should not have happened."

Don E on January 2025


Avatar for D'amato, Inc.
D'amato, Inc.
1200 SW Blvd
4.95(
19
)
Approved Pro
D'amato, Inc.
1200 SW Blvd
4.95(
19
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
51 local quotes requested

D'amato, Inc., is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!

"Very satisfied!"

Rusty C on October 2023

D'amato, Inc., is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!

"Very satisfied!"

Rusty C on October 2023


Avatar for One Hour Heating & Air Conditioning
One Hour Heating & Air Conditioning
100 North Franklin Boulevard
4.39(
70
)
Approved Pro
One Hour Heating & Air Conditioning
100 North Franklin Boulevard
4.39(
70
)
Approved Pro
Customers say: Quick response
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
25 local quotes requested

One Hour Heating & Air Conditioning promises you that we're always on time, or you don't pay a dime. For your peace of mind, our employees' backgrounds are checked, and they are tested for drug use.

"Very friendly people and knowledgeable"

Karen P on September 2024

One Hour Heating & Air Conditioning promises you that we're always on time, or you don't pay a dime. For your peace of mind, our employees' backgrounds are checked, and they are tested for drug use.

"Very friendly people and knowledgeable"

Karen P on September 2024


Avatar for Laury Heating Cooling & Plumbing
Laury Heating Cooling & Plumbing
511 E Plum St
4.84(
171
)
Approved Pro
Laury Heating Cooling & Plumbing
511 E Plum St
4.84(
171
)
Approved Pro
Customers say: True professional
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
267 local quotes requested

For over 75 years, Laury Heating Cooling & Plumbing, a family owned and operated local business, has been entrusted by South Jersey residents to meet your heating, cooling and plumbing needs. A fully licensed and insured company, our courteous and professional staff will provide you with quick and reliable service for your home and business comfort, all at a guaranteed price. Laury Heating Cooling & Plumbing provides the best value with competitive pricing and outstanding service. We are proud to be associated with exceptional suppliers including Carrier, Mitsubishi, WaterFurnace, Weil-McLain and more. Our skilled engineers and technicians regularly attend workshops, schools and seminars furnished by heating, cooling and plumbing manufacturers, distributors and NJ state associations, allowing us to provide you with sales and maintenance on the latest technologies.

"We use Laury for repair and maintenance of our heating and cooling units for our rental properties and each time we need something done, the staff at Laury never cease to provide quality service. The technicians are always knowledgeable, thorough, courteous and pleasant. We recently had an HVAC system installed in one of our units and the home is rather large and is over 100 years old and there was not a whole lot of empty space to work with. The guys at Laury were able to install the system and all of the duct work and components involved neatly with the age and make-up of the home in-mind. They were pleasant throughout the entire installation which took almost a week. They were always on time and always communicated the process with us. Laury is a trusted business with many years of experience behind them. Prices are also extremely reasonable given the cost of services right now. Warren you are the man!"

Jacqueline J on November 2023

For over 75 years, Laury Heating Cooling & Plumbing, a family owned and operated local business, has been entrusted by South Jersey residents to meet your heating, cooling and plumbing needs. A fully licensed and insured company, our courteous and professional staff will provide you with quick and reliable service for your home and business comfort, all at a guaranteed price. Laury Heating Cooling & Plumbing provides the best value with competitive pricing and outstanding service. We are proud to be associated with exceptional suppliers including Carrier, Mitsubishi, WaterFurnace, Weil-McLain and more. Our skilled engineers and technicians regularly attend workshops, schools and seminars furnished by heating, cooling and plumbing manufacturers, distributors and NJ state associations, allowing us to provide you with sales and maintenance on the latest technologies.

"We use Laury for repair and maintenance of our heating and cooling units for our rental properties and each time we need something done, the staff at Laury never cease to provide quality service. The technicians are always knowledgeable, thorough, courteous and pleasant. We recently had an HVAC system installed in one of our units and the home is rather large and is over 100 years old and there was not a whole lot of empty space to work with. The guys at Laury were able to install the system and all of the duct work and components involved neatly with the age and make-up of the home in-mind. They were pleasant throughout the entire installation which took almost a week. They were always on time and always communicated the process with us. Laury is a trusted business with many years of experience behind them. Prices are also extremely reasonable given the cost of services right now. Warren you are the man!"

Jacqueline J on November 2023


Avatar for LIV AIR
LIV AIR
5.00(
6
)
Approved Pro
LIV AIR
5.00(
6
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2958 local quotes requested

Air Conditioning and Heating Services - We're a team of experienced and qualified HVAC technicians dedicated to providing exceptional service, expert repairs, and top-notch installations for your Cooling and Heating systems.

"Liv Air was very professional and friendly! I would hire them again!"

Leticia P on November 2024

Air Conditioning and Heating Services - We're a team of experienced and qualified HVAC technicians dedicated to providing exceptional service, expert repairs, and top-notch installations for your Cooling and Heating systems.

"Liv Air was very professional and friendly! I would hire them again!"

Leticia P on November 2024


Avatar for Quality Choice HVAC LLC
Quality Choice HVAC LLC
Https://dot.cards/quality_choice_hvac_
New on HomeAdvisorNew on Angi
Approved Pro
Quality Choice HVAC LLC
Https://dot.cards/quality_choice_hvac_
New on AngiNew on HomeAdvisor
Approved Pro
446 local quotes requested
5 years of experience

Our mission is to be a provider 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. We can help you with all types and sizes of HVAC projects. As a locally owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. Call or message us to schedule an estimate today!

Our mission is to be a provider 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. We can help you with all types and sizes of HVAC projects. As a locally owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. Call or message us to schedule an estimate today!


Avatar for Green Mechanical LLC
Green Mechanical LLC
2430 Butler ST Unit 402
5.00(
1
)
Approved Pro
Green Mechanical LLC
2430 Butler ST Unit 402
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
953 local quotes requested

At Green Mechanical, we pride ourselves in being honest and transparent. Our focus is honesty, quality and integrity. We personally take the time to make sure you are 100% happy with our services! " We are a family-owned company who takes pride in ourselves for being forthright and transparent. Our focus is honesty, quality and integrity. ''

"A Raving Review for Green Mechanical LLC! If you’re looking for the absolute best HVAC service around, look no further than Green Mechanical LLC! This company is truly a gem, and I couldn’t be more thrilled with the incredible service they provided. My heater had been misdiagnosed by another company, leaving my family and me in the cold—literally! Thankfully, I called Green Mechanical LLC, and they completely turned things around. From the moment I called, I knew I was in good hands. Devin Green, the owner himself, came to my house to personally assess the issue. This level of dedication and care is something you just don’t see every day! Devin’s professionalism, deep expertise, and genuine commitment to solving the problem made all the difference. He didn’t just slap on a temporary fix or rush through the job—he made sure to thoroughly diagnose the issue and explain every step of the process to me. A huge shoutout to Jacob and G, who also worked on my system. They were punctual, knowledgeable, and incredibly respectful of my home. Their teamwork and attention to detail were top-notch, and it was clear they take immense pride in their work. Thanks to Devin, Jacob, and G, my heater is now working perfectly, and my family can finally enjoy a warm, comfortable home again! I also want to emphasize how important it is to support small businesses like Green Mechanical LLC. These are the companies that truly care about their customers and their communities. Devin and his team are local experts who go above and beyond to deliver top-notch service, and they deserve every bit of your trust and business. If you need HVAC services—whether it’s a repair, installation, or just regular maintenance—do yourself a favor and call Green Mechanical LLC. Their commitment to excellence, fair pricing, and outstanding customer service make them a company you’ll want to recommend to everyone you know. Thank you, Devin, Jacob, and G, for your amazing work and dedication. You’ve earned a lifelong customer! 🌟"

ELEANOR R on January 2025

At Green Mechanical, we pride ourselves in being honest and transparent. Our focus is honesty, quality and integrity. We personally take the time to make sure you are 100% happy with our services! " We are a family-owned company who takes pride in ourselves for being forthright and transparent. Our focus is honesty, quality and integrity. ''

"A Raving Review for Green Mechanical LLC! If you’re looking for the absolute best HVAC service around, look no further than Green Mechanical LLC! This company is truly a gem, and I couldn’t be more thrilled with the incredible service they provided. My heater had been misdiagnosed by another company, leaving my family and me in the cold—literally! Thankfully, I called Green Mechanical LLC, and they completely turned things around. From the moment I called, I knew I was in good hands. Devin Green, the owner himself, came to my house to personally assess the issue. This level of dedication and care is something you just don’t see every day! Devin’s professionalism, deep expertise, and genuine commitment to solving the problem made all the difference. He didn’t just slap on a temporary fix or rush through the job—he made sure to thoroughly diagnose the issue and explain every step of the process to me. A huge shoutout to Jacob and G, who also worked on my system. They were punctual, knowledgeable, and incredibly respectful of my home. Their teamwork and attention to detail were top-notch, and it was clear they take immense pride in their work. Thanks to Devin, Jacob, and G, my heater is now working perfectly, and my family can finally enjoy a warm, comfortable home again! I also want to emphasize how important it is to support small businesses like Green Mechanical LLC. These are the companies that truly care about their customers and their communities. Devin and his team are local experts who go above and beyond to deliver top-notch service, and they deserve every bit of your trust and business. If you need HVAC services—whether it’s a repair, installation, or just regular maintenance—do yourself a favor and call Green Mechanical LLC. Their commitment to excellence, fair pricing, and outstanding customer service make them a company you’ll want to recommend to everyone you know. Thank you, Devin, Jacob, and G, for your amazing work and dedication. You’ve earned a lifelong customer! 🌟"

ELEANOR R on January 2025


Avatar for Hutchinson Plumbing Heating Cooling LLC
Hutchinson Plumbing Heating Cooling LLC
621 Chapel Ave
4.19(
237
)
Approved Pro
Hutchinson Plumbing Heating Cooling LLC
621 Chapel Ave
4.19(
237
)
Approved Pro
Customers say: Quality work
3065 local quotes requested
77 years of experience

George H. Hutchinson, Sr., and sons William A. Hutchinson, Sr. and George H. Hutchinson, Jr. founded the Hutchinson family business in 1948. George and his sons started Hutchinson Engineering with their accumulated wealth – $35 in a cigar box – in rural Haddonfield, New Jersey. Serving all of South Jersey, Philadelphia, & Hunterdon, Middlesex, Monmouth, Ocean, Somerset, & portions of Warren & Westchester Counties.

"Company is way to expensive and the work was not mediocre. They use GoodLeap for financing, and they rip you off with that contract as well. Stay away!"

ROBERT B on March 2025

George H. Hutchinson, Sr., and sons William A. Hutchinson, Sr. and George H. Hutchinson, Jr. founded the Hutchinson family business in 1948. George and his sons started Hutchinson Engineering with their accumulated wealth – $35 in a cigar box – in rural Haddonfield, New Jersey. Serving all of South Jersey, Philadelphia, & Hunterdon, Middlesex, Monmouth, Ocean, Somerset, & portions of Warren & Westchester Counties.

"Company is way to expensive and the work was not mediocre. They use GoodLeap for financing, and they rip you off with that contract as well. Stay away!"

ROBERT B on March 2025


Avatar for Horizon Services
Horizon Services
17 Roland Avenue
4.41(
75
)
Approved Pro
Horizon Services
17 Roland Avenue
4.41(
75
)
Approved Pro
Customers say: Super punctual
2207 local quotes requested
38 years of experience

Horizon Services is the region’s largest and most well respected plumbing, heating and air conditioning company, with nearly 600 employees serving tens of thousands of homeowners throughout Delaware, Southeastern Pennsylvania, Southern New Jersey, and Northeastern Maryland. After a quarter of a century in business, Horizon Services remains fully committed to setting the industry standard for customer service, installation, and focusing on things that are important to busy homeowners: respect for their time, their home and their property; up-front pricing, and an unconditional 100% money back guarantee.

"Stellar service from a company with a well-earned reputation for solid workmanship. These guys are the real deal. Ramon was exceptionally knowledgeable and spent a great deal of time explaining what needed to be done. Once I signed the contract, everything happened at lightening speed. The servicemen showed up on time, were careful to not damage the doors, walls, or hardwood floors when they hauled in the new gas boiler and water heater, and left the basement in spotless condition. After I sold the oil stored in my old oil tank, Horizon was out the very next day to cut up the tank, clean the inside of it, and haul it onto the driveway for inspection. Not a single drop of oil was spilled. They are that meticulous about their work. A shout out not only to the remarkably zenlike Ramon, but also to Robert, who patiently and respectfully dealt with an unnecessarily finicky inspector."

Susan C on February 2024

Horizon Services is the region’s largest and most well respected plumbing, heating and air conditioning company, with nearly 600 employees serving tens of thousands of homeowners throughout Delaware, Southeastern Pennsylvania, Southern New Jersey, and Northeastern Maryland. After a quarter of a century in business, Horizon Services remains fully committed to setting the industry standard for customer service, installation, and focusing on things that are important to busy homeowners: respect for their time, their home and their property; up-front pricing, and an unconditional 100% money back guarantee.

"Stellar service from a company with a well-earned reputation for solid workmanship. These guys are the real deal. Ramon was exceptionally knowledgeable and spent a great deal of time explaining what needed to be done. Once I signed the contract, everything happened at lightening speed. The servicemen showed up on time, were careful to not damage the doors, walls, or hardwood floors when they hauled in the new gas boiler and water heater, and left the basement in spotless condition. After I sold the oil stored in my old oil tank, Horizon was out the very next day to cut up the tank, clean the inside of it, and haul it onto the driveway for inspection. Not a single drop of oil was spilled. They are that meticulous about their work. A shout out not only to the remarkably zenlike Ramon, but also to Robert, who patiently and respectfully dealt with an unnecessarily finicky inspector."

Susan C on February 2024


Avatar for RG3C, LLC
RG3C, LLC
Located In:
4.83(
6
)
Approved Pro
RG3C, LLC
Located In:
4.83(
6
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1484 local quotes requested

We specialize in handyman services, carpentry, home repairs, home improvements, and more! We pride ourselves on the quality work we provide, while delivering great customer service. Please see some the services we offer below and call -or- click to schedule a free estimate today!

"Robert was great. He was punctual and communicated what to expect prior to the job being done. He answered any questions I had honestly and provided all receipts needed for supplies. I already plan on hiring him again for a future job and have referred others to him. Don't hesitate to reach out to him for services as he is professional and does quality work."

Jade P on May 2025

We specialize in handyman services, carpentry, home repairs, home improvements, and more! We pride ourselves on the quality work we provide, while delivering great customer service. Please see some the services we offer below and call -or- click to schedule a free estimate today!

"Robert was great. He was punctual and communicated what to expect prior to the job being done. He answered any questions I had honestly and provided all receipts needed for supplies. I already plan on hiring him again for a future job and have referred others to him. Don't hesitate to reach out to him for services as he is professional and does quality work."

Jade P on May 2025

...
Showing 1-10 of 973

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.
technician repairing solar panel on roof
Apr 30, 2025
Apr 30, 2025
Budget for solar panel repair costs based on factors such as system type, panel size, accessibility, repair type, labor, parts, inspections, and more.
new solar panels installed on roof of home
Apr 30, 2025
Apr 30, 2025
Budget for solar panel installation costs based on factors such as system size, panel type, electrical requirements, location, rebates, maintenance, and more.
dryer vent on the exterior of a home
Apr 25, 2025
Apr 25, 2025
Budget for dryer vent installation costs based on factors such as location, materials, vent type, hose length, labor, potential repairs, and more.
heat pumps installed on the side of a brick house
Apr 24, 2025
Apr 24, 2025
Budget for heat pump costs based on factors such as labor, pump capacity, efficiency rating, location, pump type, tax incentives, and more.
Aerial view of a Solar photovoltaic panels on a wood house roof surrounded by green vegetation
Nov 18, 2022
Nov 18, 2022
HomeAdvisor’s Solar Panel Cost Guide explores the cost of solar panels in California. Use our guide to find out how much solar panels cost in your city.
heat pump being repaired on the side of house
Apr 19, 2025
Apr 19, 2025
Use this guide to budget for heat pump repair costs based on factors such as problem type, part, heat pump type, professional labor, and more.
Share project details to get started.