Your Trusted Heating and Air Conditioning Experts in O’Fallon, Missouri

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 Heating and Air Conditioning 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 Heating and AC 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

What Our Clients Are Saying

Nathan and cole did great job will recommend this company to friends and family
Sharvil Patel
Trevor was professional and efficient
Michele Pidgeon
Trevor was my service tech. I was highly impressed by that young man knowledge and professionalism. I chatted with him briefly and it's rare to find someone that young to be so humble and respectful. My heart is truly full, I raved highly about him to my wife. #SaluteToYouTrevorCalvin
Calvin Payne JR
Trevor and Jacob showed up on time and were very polite , professional, patient with all my questions ! They also replaced a drain hose that was in bad condition and clogged ! Would not hesitate to have this young men do work for us again ! Thanks again Stay Cool for working me into your schedule !
Mark Sullivan
Cole and Jacob were professional and punctual
cody blount
Cole with Stay Cool showed up on time when others couldn't. He shared valuable insight and recommendations for upkeep and preventive maintenance for us to do in the future. Stayed to make sure that the repairs performed were working correctly. Also checked other items not directly related to the issue to be sure of his repair.10/10 would call again.
ansel wood
Very Happy! When installation was necessary, they had the product needed available. Prompt, on time service. Excellent response when follow up was needed.I recommend Stay Cool to anyone needing HVAC installation or service.
Ted Chibnall
Jeremy was on time, made sure to explain each of the steps he took to test and diagnose both my cooling and heating systems. He then explained all aspects of the processes he used to correct each of the deficiencies and allowed me to witness his procedures. All in all... I plan to stick with this company for my future heating and cooling needs.
Ken Saylor
Thankful to have found “stay cool climate control!” It was a great choice I made to have individual inspections of my new home versus one guy who knows a little bit about everything. It was reassuring to have Cole here for an hour and a half going through my whole system making sure everything was up to par! He went through everything with me including teaching me how to use a thermostat I’m not familiar with! It was nice having the individualized service! He made some recommendations but I never felt pressured to do any extra service with them. I would definitely recommend this company!
Laura Groom

Licensed, Bonded & Insured
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

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

Trevor B.

Trevor B.

Repair flue pipe and making sure another home is safe for furnace season. #staywarm O’Fallon,MO

Near Woodgrove Park Dr, O'Fallon, MO 63366
O'Fallon, MO - Repair flue pipe and making sure another  home is safe for furnace season. #staywarm O’Fallon,MO
Trevor B.

Trevor B.

Taco man and I our out making sure your furnace is safe in O’Fallon,MO.

Near Winding Stair Way, Dardenne Prairie, MO 63368
Dardenne Prairie, MO - Taco man and I our out making sure your furnace is safe in O’Fallon,MO.
Trevor B.

Trevor B.

Air Handler tune-up in O’Fallon,MO.

Near Piedmont Cir, St. Peters, MO 63304
St. Peters, MO - Air Handler tune-up in O’Fallon,MO.
Trevor B.

Trevor B.

Furnace tune-up in O’Fallon, MO.

Near Brook Mont Dr, O'Fallon, MO 63366
O'Fallon, MO - Furnace tune-up in O’Fallon, MO.
Trevor B.

Trevor B.

Checking in for a furnace tune up in O’Fallon,MO. #staywarm

Near Warrior Song Way, O'Fallon, MO 63366
O'Fallon, MO - Checking in for a furnace tune up in O’Fallon,MO. #staywarm

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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