Top-Rated HVAC Contractor in
O’Fallon, Missouri

I called late in the afternoon yet they still got Alex to my home in under an hour.
I've got an HVAC service company now.
A gentleman, and a fantastic representative of your company.
Extremely satisfied!

Shout out to Nathan and Johnnie. Very professional, polite, and patient on such a hot day. Couldn't ask for a better team of installers.

Update: since google won’t allow more than 1 review- I had to edit because my service today was so good.. since my original review a little over a year later I had new issues arise which caused some safety issues and replacement parts for my 30 year old system were a mess to find therefore I had a new system installed, it ran so efficient bills were lower I was so relieved but suddenly after a few months of using the ac it got hot and the fan wasn’t turning and I was sooo upset but stay cool came out promptly and Alex is a super professional all around nice guy who took his time and was so thorough in testing everything and figuring what caused the issue and it’s back cool in here!! Honestly people & warrenty! 🌮 bout service!😎!
I’m happy with this company and will refer them to anyone! Carter and every person I came in contact with by phone or text was patient and helpful. Cole and Brayden came out today for service and walked me through various options for repair vs replacement. They were prompt ( seriously prompt- beat me there). Super friendly and thoroughly explained everything with pictures. I opted for repair and they got it done on the spot. I’m not the best at names🙃 but was lucky to meet the owner of this company many years ago through a friend/ coworker before he started
after some bad hvac service experiences and he was so honest and knowledgeable and even corrected mistakes made by others in minutes, my ac never ran so well. This is my only choice from that day forward! Stay cool!

Wonderful experience!

Nathan and Johnny were awesome to work with during the install process. I was fortunate to have them.

AC went out last night with temps in the mid 90’s. With one call to Jeremy, he had a tech out first thing the next morning. Had me up and running again in less than an hour, and the house is already back to temp in less than 18 hours. Will definitely resume them again…prompt and reliable. Tech was super friendly…he also showed me a quick and simple fix I can do myself to prevent further damage down the road.

RECOMMEND! RECOMMEND!! RECOMMEND!!!
Great company, goes above and beyond, they don't money grab, they love pets.

My husband and I just bought our first home, we knew our A/C unit would eventually need replaced, next thing we know it was completely out in the middle of summer.

We reached out to Stay Cool and they showed up on time for both the initial inspection and the installation. Showed pictures of problem areas. Out the door price, taxes included. Very clean and professional. Even fixed our gas water heater exhaust because it was sketchy. Overall above and beyond what we expected.

I would also like to add again, THEY DONT MONEY GRAB! For the size of our home, the standard cheapest unit was a perfect fit. That is exactly what they recommended. They were very understanding of our finances as we just bought this house and even gave us different tips to help make this purchase easier.

We are so happy to know that we will not be having any issues any time soon! Thank you guys for all of your help and Stay Cool! 😉

Dalton was very professional and courteous. He explained everything in detail. He provided exceptional service. I will contact them in the future if I need any further service.

Jeremy was very professional and took the utmost care with the maintenance and repair of my home A/C. He was very thorough and didn’t try to push any services. He gave me my options and left the decision up to me! 10/10 great service.

I like that stay cool does their best to assign the same technicians to you each time. Jeremy was already up-to-date on my house and my systems, so there was no acclamation in order for him to begin service. I will continue to recommend stay cool to anyone that asks.

Very professional, very knowledgeable, great customer service. 4th time I have used them at different properties and recommend them to anyone having HVAC issues.

Everything was great! They are straightforward, honest and well priced! I couldn’t be happier with their service!

Appointment was easy to make and commutation by text told me exactly who was coming to my house- that was excellent!! Loved supporting local! Repairman was knowledgeable & offered us all the options available. Explained everything that needed tk be done and was excellent. Thank you so much!

It was unbelievable....5th day of the record heat and of course my 24 year old a/c had to go out...called in morning and they squeezed me in Travis came out did a super job and very knowledgeable and pleasant to chat with. Got it all fixed up and running great ...thanks Stay Cool....Jeremy for getting me in and Travis for coming out and fixing it.

Outstanding service from start to finish! Stay Cool Climate Control recently installed both our new air conditioning and heating systems, and we could not be happier. The entire team was professional, punctual, and highly knowledgeable. They took the time to assess our home's needs, explain our options clearly, and answer all of our questions.The installation process was flawless. The technicians were respectful of our property, worked efficiently, and left the area spotless. Both systems are running perfectly, and our home has never been more comfortable. If you want top-tier workmanship and reliable customer service, I highly recommend Stay Cool Climate Control!

Had a snake in my air conditioner. Called another company who said I would have to get pest control out to remove the dead snake before they would come out. Called Stay Cool and they came out quickly and removed the snake and got my AC running again. I was so thankful because it was so hot outside. I would recommend this company to everyone. There is a reason they have 5 stars!! Thanks Stay Cool!!

We had an old mini split removed amd a new unit installed. Great service, great guys!

Doug and Trey did a great job today. Very informative and done in 4 hours. Thanks

Cindy and Travis were amazing to work with. Cindy was polite and efficient in setting an appointment for a technician to come out. Travis showed up on time with a great attitude found the problem and fixed it in no time. I couldn’t be more satisfied with this company and how they treated us. Amazing work Stay Cool
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