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Top-Rated Thermostat installers and replacers in Alpharetta - Updated Nov 2026

Avatar for Keep Smiling Plumbing, Electric, Heating & Cooling
Keep Smiling Plumbing, Electric, Heating & Cooling
4.6(
171
)
Thermostat - Install or Replace

Serving Alpharetta, GA and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1985

Emergency services offered

Warranties offered

"Keep Smiling sent me Roy Wint and I'm very glad they did. Roy installed a replacement ceiling fan as well as four recessed lights. The result of the project is a much better lit and livable living room. I want to extend special kudos to Roy. He was very professional, polite, and friendly. A joy to have working on my home. He went out of his way to avoid creating any holes in the ceiling other than those housing the lighting fixtures. And he also did a safety inspection of my home's fuse box. I can't say enough good about this young man. I'll definitely be calling him the next time I need electrical work done in my home."
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+2

324 neighbors recently requested a quote
Recommended by75%of homeowners
Avatar for Rashad Ac and Heating, LLC
Rashad Ac and Heating, LLC
4.5(
159
)
Thermostat - Install or Replace

Serving Alpharetta, GA and surrounding areas

Approved

In business since 2017

Free estimates

Credit card accepted

"Purchased two Nest thermostats for my home and installed them myself. The first one was installed with no issue. The second one was having power issues. Attempted to troubleshoot myself. To no avail. Called Rashad's company and he came out there next day. Very prompt and professional. Rashad diagnosed the problem as a defective thermostat very quickly."
Response time12 hrs
5 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for 4 Seasons Heating & Air
4 Seasons Heating & Air
4.2(
110
)
Thermostat - Install or Replace

Serving Alpharetta, GA and surrounding areas

Approved (Corporate)

In business since 2007

Free estimates

Credit card accepted

"I got some good information from the technician that came out to the house. He gave me several options regarding repairing my AC unit as well as explained some issues with the previous installation that was causing my current problems."
Trane
Trane
Trane
Trane
Transition

+25

Response time1 day
Recommended by98%of homeowners
Avatar for JAMES ALTMAN HANDYMAN
JAMES ALTMAN HANDYMAN
4.7(
153
)
Thermostat - Install or Replace

Serving Alpharetta, GA and surrounding areas

Approved

In business since 2005

Credit card accepted

Customers say: Super punctual

"While replacing the flooring upstairs I ran into an issue with the transition to the staircase. James was able to cut off the step overhang, cut and install the stair riser to fit along with trim. He then installed the stair transition along with a handful of hardwood boards to ensure it connected well to the rest of the flooring. James was quick to answer or respond throughout the scheduling process and arrived right on time for our appointment. He went about the job efficiently and finished in about 5 hours which included a trip to Home Depot to get some supplies that I did not have on hand. Overall I felt that James was very professional, showed a respect for his customer's time, and completed the job as quickly as possible while still doing a thorough job."
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+12

Response time1 day
Recommended by95%of homeowners
Avatar for All Airs Home Services
All Airs Home Services
4.6(
11
)
Thermostat - Install or Replace

Serving Alpharetta, GA and surrounding areas

Approved

In business since 1980

Free estimates

Warranties offered

All Airs Home Services is a family-owned and operated HVAC and plumbing company proudly serving homeowners and businesses across North Georgia. With decades of experience managing successful home service businesses, our owners understand the unique needs of Georgia families. Our team is committed to doing the job right the first time. Whether you're facing an "AC not cooling" emergency in the summer, a "furnace not heating" issue during winter, or need a complete HVAC system replacement, we deliver fast, dependable service with upfront pricing and a 100% satisfaction guarantee.

HVAC Install
HVAC Install
HVAC Install
HVAC Install
Recommended by33%of homeowners
Avatar for United Air Temp, Air Conditioning and Heating
United Air Temp, Air Conditioning and Heating
New to Angi
Thermostat - Install or Replace

Serving Alpharetta, GA and surrounding areas

Approved (Corporate)

In business since 1992

Free estimates

Emergency services offered

United Air Temp 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.\n

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FAQs for thermostat installation and replacement projects in Alpharetta, 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 Alpharetta, 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.