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Find Thermostat installers and replacers in Lake Saint Louis

C Hatcher Construction
4.8(
8
)

Serving Lake Saint Louis, MO and surrounding areas

Angi Approved

Customers say: Quick response

"Clint started off strong as a handyman. His workmanship was excellent, his rates were fair, and he was pleasant to work with. Unfortunately, there began to be recurring issues with schedule management and timely communication, which negatively impacted my projects. A miscommunication ultimately led to offense being taken, and he abruptly discontinued work via text without notice to my surprise. Disappointed though I am, I?m thankful for the work he was able to do and wish him all the best as I start the process again to secure another handyman for my remaining items and to have on hand for regular maintenance in the long term. "
Response time2 days
Recommended by87%of homeowners
Avatar for ComfortWorks Heating and Cooling
ComfortWorks Heating and Cooling
5.0(
6
)

Serving Lake Saint Louis, MO and surrounding areas

Angi Approved

In business since 2015

Free estimates

Emergency services offered

"Lucas was prompt and professional. He diagnosed the issue and replaced my capacitor in less than 30 minutes! He also checked the freon as well. I highly recommend Lucas with ComfortWorks Heating and Cooling."
Heat Pump
Hanley HVAC Install
Hanley HVAC Install
Vans
Amana Variable Speed Gas Furnace

+3

Response time4 hrs
3 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Aire Serv of St. Louis
Aire Serv of St. Louis
5.0(
5
)

Serving Lake Saint Louis, MO and surrounding areas

Angi Approved

In business since 2024

Free estimates

Emergency services offered

Looking for reliable HVAC service in St. Louis? Aire Serv of St. Louis is your local expert for residential and commercial heating and cooling. From emergency AC repair during humid Missouri summers to furnace maintenance before the winter chill, our professional technicians are available to keep your home comfortable. We pride ourselves on transparent, upfront pricing, no overtime charges, and the "Done Right Promise." Whether you need a system replacement, duct cleaning, or a routine tune-up in Fenton, Webster Groves, or Kirkwood, we are the team you can trust. Breathe easy with Aire Serv—your comfort is our top priority. Call us today to schedule your service!

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10 neighbors recently requested a quote
Avatar for Schraer Heating and Air Conditioning
Schraer Heating and Air Conditioning
5.0(
3
)

Serving Lake Saint Louis, MO and surrounding areas

Angi Approved

In business since 1946

Free estimates

Emergency services offered

"I cannot say enough wonderful things about this amazing company! My daughter and I had been without a furnace for over 6 years. We used space heaters in the bedrooms, bathroom and kitchen, but the rest of the house stayed cold. Along with that, I had a constant fear of an electrical fire resulting from the units, because last year a young mother and her baby died in a house fire down the street from us, most likely caused from a space heater. When Schraer came to our home that offered to install gas furnace free off charge that was just sitting in their shop! We are truly Blessed and Grateful for their kindness and generosity! There are good people out there in the world, and the owners and employees of Schraer Heating and Cooling are some of best!"
Airlift rooftop unit
Duct installation
Geothermal job
Crane lift a rooftop unit
Finalize duct on a new construction

+3

Response time1 day
54 neighbors recently requested a quote
Avatar for Delmain Contracting, LLC
Delmain Contracting, LLC
New to Angi

Serving Lake Saint Louis, MO and surrounding areas

Angi Approved

Free estimates

Credit card accepted

Hi my name is James and I started drlmain contracting llc. Im the sole owner and local to Franklin County MO. I enjoy building fences and I work close with my customers. First responders military and seniors all get 5% discount on all work done by delmain contracting llc. Thank you.

Fence build
Fence build
Avatar for M2 Connected Homes LLC
M2 Connected Homes LLC
New to Angi

Serving Lake Saint Louis, MO and surrounding areas

Angi Approved

Free estimates

Small jobs welcome

At M2 Connected Homes, our mission is to provide cutting-edge security & smart home solutions tailored to the unique needs of modern homeowners. We believe that every home deserves a secure environment without compromising on style and functionality.

Audio/Data/CAT6E
SPEAKER CABLES
2 neighbors recently requested a quote
Avatar for ARCO Heating & Cooling
ARCO Heating & Cooling
New to Angi

Serving Lake Saint Louis, MO and surrounding areas

Angi Approved

In business since 1963

Free estimates

Warranties offered

For more than 60 years, ARCO Heating & Cooling has been the local HVAC company that residents and businesses turn to for their heating and cooling needs. What began as a small business has grown into a cornerstone of the St. Charles, St. Louis, & Illinois communities, providing dependable service designed to keep our neighbors comfortable year-round. As a family-owned, local HVAC company, we’re more than just a service provider—we’re part of the community. We live and work right here in the St. Charles, St. Louis, & Illinois Metro areas, so we understand the unique climate challenges our neighbors face. This local connection fuels our dedication to providing personalized service and dependable solutions that make life easier for our customers.

AC Data Plate
AC Wiring
AC Wiring 2
AC Voltage Readings
TitleAC Wiring 3

+20

Response time8 hrs
Avatar for CGX Overhead Door LLC
CGX Overhead Door LLC
4.9(
884
)

Serving Lake Saint Louis, MO and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"System installed 2 years ago. Tore out of wall. They advertise 24/7 emergency repair. Called for help after trying to fix it for an hour so I could at-least get my car out of the garage. This was a Sunday. Traveling home for holidays on Monday. Texted with Cory for some advice. Which didn’t work then he called me to try to help. Obviously at this time I was getting frustrated and panicked. Asked for someone to please come help me. And he said they don’t work on weekends and I was demanding. Definitely do not recommend"
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+7

Recommended by96%of homeowners
Avatar for Wesling Electric Corporation
Wesling Electric Corporation
5.0(
101
)

Serving Lake Saint Louis, MO and surrounding areas

In business since 1978

Free estimates

Emergency services offered

"I am so pleased with my choice to hire Wesling Electric. Robert was polite, professional and easy to work with. Of the three bids I received for my project, his bid was in the middle price-wise. I was confident hiring Robert because he seemed very competent and would be the same person who would be coming back to do the work. I didn't have to worry about job details getting mixed up or miscommunicated between a project manager and worker. As of March 2022 Wesling Electric was booking one week out (this was the same timeframe for all 3 companies I spoke with). The job took less than a day. Robert confirmed how I wanted the new switches to work and didn't mind me being picky with the placement of a ceiling fan. I will definitely contact this company again for future electrical projects in my home."
Additional Photos
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+87

Recommended by99%of homeowners
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FAQs for thermostat installation and replacement projects in Lake Saint Louis, MO

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 Lake Saint Louis, MO homeowners’ guide to thermostat installations and replacements

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