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

Save More With Our Specials

$100 OFF

Air Purification
System

Expires on

$50 OFF

Whole Home Humidifier

Expires on

$25 OFF

First Service
Call

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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

Jacob and Cole were courteous and professional
Dardenne Retriever Club
Excellent and friendly crew, great work!
J Quinlan
Cole and Nathan were the techs. They arrived on time and went straight to work. no breaks or even lunch. They worked hard to make sure everything was done correctly even when they encountered a problem. The price was very competitive. I couldn't be happier with their service.
Barb Moore
Cole & Jacob were Very very professional and reached out to schedule Installation of Humidifier. I appreciated their ability to educate me on my HVAC system and how I can get the most value out of it then based on the info did go with yrly maintenance which has more value..I do recommend Stay Cool For sure…!
Prakash Cheerla
Great customer service
John Hummel
The best!
Douglas Brewer
On time. Nice. Knowledgeable. Upfront. Great service and no up selling. Did what they said and great advice for things to look out for down the road. Highly recommend!
Treat Box Guy
I noticed this morning my furnace stopped blowing hot air, after changing the air filter the problem wasn't solved. I called Stay Cool on a Saturday Morning at 7am and at 12pm my furnace is back working again! Super helpful to have a great company local to O'Fallon with excellent service, quick response times, and reasonable prices. Shout Out to Cole, my technician, he was very knowledgeable and very professional. I'd recommend using this business!
Billy Roland
Cole and Jacob were very professional and reached out to schedule my yearly furnace tune up. I appreciated their ability to educate me on my HVAC system and how I can get the most value out of it.
JC Dove

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

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

Jeremy W.

Jeremy W.

Heat and air conditioning replacement options o fallon Missouri #StayCool #StayComfortable

Near Timber Oaks Trail, O'Fallon, MO 63368
O'Fallon, MO - Heat and air conditioning replacement options o fallon Missouri #StayCool #StayComfortable
Cole W.

Cole W.

Full System Replacement In Wentzville

Near Donna Marie Dr, Wentzville, MO 63385
Jeremy W.

Jeremy W.

Air conditioning and heat estimate o fallon Missouri. #StayCool

Near Thoreau Blvd, O'Fallon, MO 63366
O'Fallon, MO - Air conditioning and heat estimate o fallon Missouri. #StayCool
Jacob A.

Jacob A.

Heat pump and Air handler installation, heating and cooling O’Fallon Missouri

Near Technology Dr, O'Fallon, MO 63368
O'Fallon, MO - Heat pump and Air handler installation, heating and cooling O’Fallon Missouri
Cole W.

Cole W.

Full System Install in Ofallon

Near Bryan Ln, O'Fallon, MO 63368
O'Fallon, MO - Full System Install in Ofallon

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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