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Find Thermostat installers and replacers in Cumming

Avatar for Casteel Heating, Cooling, Plumbing & Electrical

Casteel Heating, Cooling, Plumbing & Electrical

4.79(
89
)
Approved Pro

Casteel Heating, Cooling, Plumbing & Electrical

4.79(
89
)
Approved Pro
Customers say: Super punctual
101 local quotes requested
39 years of experience

At Casteel Heating, Cooling, Plumbing and Electrical, we provide world-class service to our customers, just as we have since 1987. Founded by Jan and Bob Casteel, our company was built on honesty and customer-focused care. To this day, we offer our Amazing Care Guarantee: We’ll take amazing care of you or we’ll refund your service call fee. Our expert team of plumbers, electricians, HVAC technicians, and system design managers performs top-quality repairs and installations while ensuring you are completely satisfied with your entire customer service. Because we offer so many services under one roof, you’ll save time and money by making one phone call to Casteel. Formerly: Knight Air Conditioning and Heating Company

"did a great job"

Christopher K on February 2026

At Casteel Heating, Cooling, Plumbing and Electrical, we provide world-class service to our customers, just as we have since 1987. Founded by Jan and Bob Casteel, our company was built on honesty and customer-focused care. To this day, we offer our Amazing Care Guarantee: We’ll take amazing care of you or we’ll refund your service call fee. Our expert team of plumbers, electricians, HVAC technicians, and system design managers performs top-quality repairs and installations while ensuring you are completely satisfied with your entire customer service. Because we offer so many services under one roof, you’ll save time and money by making one phone call to Casteel. Formerly: Knight Air Conditioning and Heating Company

"did a great job"

Christopher K on February 2026


Avatar for Happy Handyman, LLC.

Happy Handyman, LLC.

4.83(
66
)
Approved Pro

Happy Handyman, LLC.

4.83(
66
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
3 years of experience

I have been in the construction industry for over 25 years. As a homeowner needing to get things done that I do not have time to do, I tried to hire people to do the work for me. If I contacted companies, they did not answer the phone and if you left a message they did not call back. If they did call back or they would schedule appointments and never show up or if they did show up you would never hear from them again. If I was lucky to find one that provided an estimate, they did not know how to do the projects requested. Larger companies do not want to do the "little" things. At the point of getting so frustrated, I decided to start this business so that other homeowners would not have to go through this. I have hired professional and qualified people; drug test and background checks have been performed on them to ensure clients safety. The technician comes out, accesses the work and pricing is given on site. If pricing is accepted, the technician will perform the work immediately. You do not pay for the work until the job has been completed to your satisfaction.

"Lots of different kinds of outdoor work."

Jayne C on August 2025

I have been in the construction industry for over 25 years. As a homeowner needing to get things done that I do not have time to do, I tried to hire people to do the work for me. If I contacted companies, they did not answer the phone and if you left a message they did not call back. If they did call back or they would schedule appointments and never show up or if they did show up you would never hear from them again. If I was lucky to find one that provided an estimate, they did not know how to do the projects requested. Larger companies do not want to do the "little" things. At the point of getting so frustrated, I decided to start this business so that other homeowners would not have to go through this. I have hired professional and qualified people; drug test and background checks have been performed on them to ensure clients safety. The technician comes out, accesses the work and pricing is given on site. If pricing is accepted, the technician will perform the work immediately. You do not pay for the work until the job has been completed to your satisfaction.

"Lots of different kinds of outdoor work."

Jayne C on August 2025


Avatar for Keep Smiling Plumbing, Electric, Heating & Cooling

Keep Smiling Plumbing, Electric, Heating & Cooling

4.52(
46
)
Approved Pro

Keep Smiling Plumbing, Electric, Heating & Cooling

4.52(
46
)
Approved Pro
Customers say: Quick response
41 years of experience
Emergency services offered

Since 1985, Keep Smiling Plumbing Electric Heating and Cooling has been providing Gwinnett County and the surrounding community with any ad all of their home service needs. We pride ourselves on quality workmanship, provided by a friendly, licensed, professional service experience delivered on time, at a fair price. We are equipped to handle every residential and light commercial service, including plumbing electrical heating and cooling services. Our team of professionals is pre-scheduled from the office to guarantee convenient appointment times and a phone call when we are headed to your home. Your service professionals are uniformed and arrive in a well-marked company vehicle. Our team members are prescreened, drug tested, and highly trained to ensure your experience is fast, effective, and affordable. We look forward to earning your business. -$39 Diagnostic Fee

"⭐️⭐️⭐️⭐️⭐️ I want to start by highlighting the *above and beyond* service I received from Keep Smiling Heating & Air. In the midst of a brutal Atlanta heatwave, I called in a panic because my newer AC unit had suddenly stopped blowing cold air. From the first point of contact, the experience was incredibly professional and reassuring. I received a confirmation text, a follow-up call when the technician was in route, and even a text introduction with a picture and background info on the technician. Who does that? **Keep Smiling does.** Technician **Byron Solares** was exceptional—knowledgeable, professional, and genuinely empathetic. I explained that I have my elderly father with a breathing condition living with me, and Byron not only resolved the issue efficiently, but took the time to explain everything clearly. Thanks to his quick work, we’re resting comfortably tonight."

Dwayne J on August 2025

Since 1985, Keep Smiling Plumbing Electric Heating and Cooling has been providing Gwinnett County and the surrounding community with any ad all of their home service needs. We pride ourselves on quality workmanship, provided by a friendly, licensed, professional service experience delivered on time, at a fair price. We are equipped to handle every residential and light commercial service, including plumbing electrical heating and cooling services. Our team of professionals is pre-scheduled from the office to guarantee convenient appointment times and a phone call when we are headed to your home. Your service professionals are uniformed and arrive in a well-marked company vehicle. Our team members are prescreened, drug tested, and highly trained to ensure your experience is fast, effective, and affordable. We look forward to earning your business. -$39 Diagnostic Fee

"⭐️⭐️⭐️⭐️⭐️ I want to start by highlighting the *above and beyond* service I received from Keep Smiling Heating & Air. In the midst of a brutal Atlanta heatwave, I called in a panic because my newer AC unit had suddenly stopped blowing cold air. From the first point of contact, the experience was incredibly professional and reassuring. I received a confirmation text, a follow-up call when the technician was in route, and even a text introduction with a picture and background info on the technician. Who does that? **Keep Smiling does.** Technician **Byron Solares** was exceptional—knowledgeable, professional, and genuinely empathetic. I explained that I have my elderly father with a breathing condition living with me, and Byron not only resolved the issue efficiently, but took the time to explain everything clearly. Thanks to his quick work, we’re resting comfortably tonight."

Dwayne J on August 2025


Avatar for Appliance Installations Plus

Appliance Installations Plus

5.00(
26
)
Approved Pro

Appliance Installations Plus

5.00(
26
)
Approved Pro
Super Service Award
Customers say: Quick response
2 years of experience
Free onsite estimate

Appliance Installations Plus can help you with all home appliance installations plus small electric and plumbing jobs as well as a wide variety of handy man services. David, our owner has 18+ years experience installing appliances and 20+ years of handyman work experience. Appliance Installations plus is insured and ready to help you bring your dreams to fruition today! Let us know how we can help!

"Repaired door latch and changed garage door opener lightbulb. Great service. Knowledgeable and respectful. Highly recommend!"

Lori S on February 2026

Appliance Installations Plus can help you with all home appliance installations plus small electric and plumbing jobs as well as a wide variety of handy man services. David, our owner has 18+ years experience installing appliances and 20+ years of handyman work experience. Appliance Installations plus is insured and ready to help you bring your dreams to fruition today! Let us know how we can help!

"Repaired door latch and changed garage door opener lightbulb. Great service. Knowledgeable and respectful. Highly recommend!"

Lori S on February 2026


Avatar for JAMES ALTMAN HANDYMAN

JAMES ALTMAN HANDYMAN

4.71(
145
)
Approved Pro

JAMES ALTMAN HANDYMAN

4.71(
145
)
Approved Pro
Customers say: Super punctual
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
21 years of experience

Looking for a reliable handyman in Atlanta? Look no further! James Altman Handyman offers a wide range of home repair and maintenance services. With expert craftsmanship and a commitment to quality, we're here to address all your handyman needs. Contact us today!

"I know I just reviewed James, so coming right back with a second one should give you a pretty good idea about how much my wife and I think of his work, and him, personally. James is professional, does quality work, including thinking outside the box to come up with innovative ways to fix issues others either couldn’t, or created."

Glenn W on July 2023

Looking for a reliable handyman in Atlanta? Look no further! James Altman Handyman offers a wide range of home repair and maintenance services. With expert craftsmanship and a commitment to quality, we're here to address all your handyman needs. Contact us today!

"I know I just reviewed James, so coming right back with a second one should give you a pretty good idea about how much my wife and I think of his work, and him, personally. James is professional, does quality work, including thinking outside the box to come up with innovative ways to fix issues others either couldn’t, or created."

Glenn W on July 2023


Avatar for A&K Handyman

A&K Handyman

4.94(
16
)
Approved Pro

A&K Handyman

4.94(
16
)
Approved Pro
Super Service Award
Customers say: Quality work
2 years of experience
Free onsite estimate

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. 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!

"Courteous, punctual, professional attitude, efficient and excellent work. The BEST experience I have had with a hired hand...thank you Andres. I will recommend his services whenever I can. "

Terry A on February 2026

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. 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!

"Courteous, punctual, professional attitude, efficient and excellent work. The BEST experience I have had with a hired hand...thank you Andres. I will recommend his services whenever I can. "

Terry A on February 2026


DMC Construction

5.00(
4
)

DMC Construction

5.00(
4
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Home remodeling. Interior & exterior restoration. New construction

Home remodeling. Interior & exterior restoration. New construction


James Service Repair & Changeout Inc

No reviews yet

James Service Repair & Changeout Inc

No reviews yet
19 years of experience

James Service Repair & Changeout Inc is licensed and insured company based in Jonesboro, GA providing HVAC services on reasonable and competitive prices. Call us for more infromation. (404) 550-6410

James Service Repair & Changeout Inc is licensed and insured company based in Jonesboro, GA providing HVAC services on reasonable and competitive prices. Call us for more infromation. (404) 550-6410


Gonzalez painting

4.00(
1
)

Gonzalez painting

4.00(
1
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Exterior and interior painting pro service

"very well, showed up on time, worked hard and completed in a timely manner."

Kenneth C on June 2019

Exterior and interior painting pro service

"very well, showed up on time, worked hard and completed in a timely manner."

Kenneth C on June 2019


Avatar for Trees Plus LTD.

Trees Plus LTD.

4.74(
53
)

Trees Plus LTD.

4.74(
53
)
Customers say: Super punctual
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers

All estimates provided by experienced Arborist / Horticulturist. Please visit our website www.treesplusltd.com Specializing in helping the homeowner understand which trees are valuable to their landscape; identifying dangerous trees and maintenance issues. Locally family owned & operated

"They did an excellent job."

Virginie M on August 2020

All estimates provided by experienced Arborist / Horticulturist. Please visit our website www.treesplusltd.com Specializing in helping the homeowner understand which trees are valuable to their landscape; identifying dangerous trees and maintenance issues. Locally family owned & operated

"They did an excellent job."

Virginie M on August 2020

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FAQs for thermostat installation and replacement projects in Cumming, GA

Smart thermostats may be worth it for many homeowners. They come with various features, including voice control and smartphone apps. Vacation mode can help lower energy usage when you’re out of town for an extended period. Alert warnings let you know about major spikes or drops in temperature. Smartphone apps can track energy usage, and smart thermostats can learn your routine over time to adjust your temperature and reduce wasted energy consumption automatically.

You typically do not need more than one smart thermostat. While it’s common to see multiple mechanical thermostats throughout a large home, multiple smart thermostats may try to override each other. This can lead to problems with the HVAC system. Ensure the unit you buy has the option for dual- or multi-zoned systems to avoid compatibility issues.

Installing a programmable or smart thermostat may save you $180 per year in utility costs. A big part of this comes from a smart thermostat’s ability to learn and adapt to your regular routines. With smartphone apps or web-based interfaces, you also have the option to control your thermostat when you’re not home.

The Cumming, GA homeowners’ guide to thermostat installations and replacements

From average costs to expert advice, get all the answers you need to get your job done.