Save More With Our Specials

$100 OFF

Air Purification

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$50 OFF

Whole Home Humidifier

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$25 OFF

First Service

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Why Choose Us as Your O’Fallon HVAC Company?

When you work with us you can be confident that you will receive personalized solutions tailored to your needs, goals, and budget. 

Our O’Fallon heating and AC technicians will take the time to listen to your needs and offer the best options for your home. We continue to stay up to date on the latest processes and technologies, and complete over 100 hours per year of continued education for safety and equipment–so you can be confident that you will be working with professionals who have your best interests in mind.

Serving the Complete Heating and Air Conditioning Needs of O’Fallon, Missouri

Stay Cool Climate Control offers full-service heating, air conditioning, and air quality solutions throughout the O’Fallon, MO area.

Our services include:

We also provide:

  • Free HVAC inspections on future home purchases

  • Water heater safety checks (included with furnace installation)

  • Thermostat labor and set-up included on new system installations

  • Safety concern recommendations

  • Virtual diagnostics (when applicable)

  • AC/Heater Loaner Program

  • Humidity testing

Gold Stars

What Our Clients Are Saying

I was very satisfied with the service provided! The technician was very knowledgeable and informative. I would use the company again and highly recommend them to my friends and neighbors. Jacob and Cole were great!
Susan Franklin
Cole and Jacob arrived exactly on time, were very professional and knowledgeable, explained everything and actually kept me from over buying what I really needed to obtain the results I wanted. The job was completed quickly and cleaned up after themselves. A great family owned business with high ethics. I very highly recommend them.
Amy Manring
I'm so happy with this company this is the second time I've used them and they are always one time and professional. They went though and explained everything to me about what is going on and what they saw. Jacob and Cole were amazing and definitely going to look into getting their package for 2 yearly maintenance and more.
Miranda Kling
The guys that came for routine heating check up were extremely nice, professional, thorough. Great experience.
Christopher Flores
Cole was a pleasure to work with. He demonstrated expertise and uncovered crucial issues with my system.As a follow-up, their team did a great job not only installing a new system, but relocating it to a better position for my basement.
Nick Forrest
Our experience w/ SCCC has been fabulous once again!
carrie moore
The guy who came was very informative and professional
Mike Marre
Replaced entire HVAC system . Group was professional, knowlegable, cusotmer focused, and experts of their trade. I would certainly recommend Stay Cool for HVAC services .
Ray Tober
Outstanding service from Stay Cool Climate Control. This is the only company that service my HVAC. Pricing is fair and reasonable and they ensure that the work is safely and meticulously done to my satisfaction. Thumbs up to Cole and Jeremy performing a root cause analysis on my furnace.
Kayode Akinbobola

Reasons To Choose


Personal Attention

From the moment we answer the phone until the completion of the project, we will make sure your experience with us is simple, straightforward, and stress-free.


Honest Service

Our foundation is built on honesty and integrity. All of our services are backed by fair pricing, high-quality workmanship, and a team that takes pride in delivering exceptional results.


Peace of Mind Guaranteed

We use state of the art equipment and tools and continue to keep up with industry standards, practices, and advancements to ensure your peace of mind with every job.

Give us a call today for heating, cooling, and indoor air quality services you can trust in O’Fallon, MO.

Real Time Service Areas

Local Reviews

Stay Cool Climate Control Rated 5.0 out of 5 stars based on 2 customer reviews

Great service

Review of Stay Cool Climate Control

Jeremy got us taken care of quickly when our ac went out. Great company with quality service

O'FallonMO63366 38.8125-90.7075

Fabulous Service

Review of Stay Cool Climate Control

During a heat wave they were able to get me in sooner than my appointment time. Jeremy was professional, informative and a pleasure to work with

O'FallonMO63368 38.76-90.7725

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You get the best and
quality service

Don’t hesitate to reach out to us for the comprehensive solutions you need. We are happy to discuss any concerns you may have and will provide the honest, professional advice you need to help you make the best decision for your home.

Contact us today to schedule a free second opinion, request an estimate, or book an immediate appointment for heating and air conditioning services in O’Fallon, Missouri.

Contact Us Today!

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