Hours: We are open 24/7

2183 West Terra Lane, O'fallon, MO 63366

(314) 513-0385

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First opening our doors in 1972, Reliable Heating and Cooling has emerged as a well-established, proven and trusted heating and cooling contractor. We offer a complete range of residential and commercial HVAC expertise, taking on jobs big and small with the same determination to do what’s right and what’s best for our customers. As a family-owned business, we take pride in the quality of the products we install, workmanship we provide and loyalty we earn.

Heating & Air Conditioning Service You Can Count On in Creve Coeur, MO

Founded by husband and wife team, Ken and Marilyn Patterson, we prioritize energy efficiency, cost-savings and system reliability, striving to make everyday that much easier and more enjoyable. We hope you’ll get in touch to make improvements, solve problems and protect the long-term performance of all makes and models of heating, cooling, indoor air quality and water heating equipment. Our NATE-certified techs are up to all challenges, including new construction installation, replacement, repairs and maintenance.

Reliable Heating and Cooling has achieved recognition as a Carrier Factory Authorized Dealer. By meeting strenuous requirements for training, product awareness, industry protocols and customer treatment, we are able to offer the best prices on the most innovative options in temperature control. Ask us about modern smart technology, high-efficiency models, zone control, wifi accessibility and the perfect solution for every residential home or commercial facility. We answer the weather in Creve Coeur with ease.

24 Hour AC Service in Creve Coeur, MO | Air Conditioning Repair

HVAC Service, Furnace Repair, Air Conditioning Repair, AC Service & Heating Installation in Creve Coeur, MO

Central Air Repair in Creve Coeur, MO | Air Conditioning Repair

Central Air RepairCentral Air Conditioning Service24 Hour AC Service ∴ Creve Coeur, MO

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Customer Reviews
What our customers are saying

I had a system malfunction on Sunday evening December 12, 2022 on my Carrier Infinity ICS purchased in 2008.I am a first time caller to Reliable. Marty called me back and had his Tech dispatched at 8 AM the next day. The unit had failed and was dangerous to use. He had a new system by the next morning. They installed it and I was completely satisfied with their service and response time. I overwhelmingly recommend Reliable and will be using them from now on.


Have been with them for more than 10 years. They provide exceptional service…from the time they call to remind you about setting an appointment to the actual service day. Derek (and all their other technicians) are knowledgeable, professional, prompt, and open to listening to questions and pay attention to details. Never had a problem with anything. Thank you for a job well done. Good pricing.

Seema Chouhan

Reliable has installed and maintained our last 2 furnaces and AC. Our experience with them has been great. Just yesterday we had an issue with our AC. I talked to Marty and he said he’d have someone out the next day. They even were able to accommodate us with an afternoon call. Derrick arrived promptly on time and had us up and going again in 15 minutes (bad capacitor on the condenser unit fan motor). With the prediction of high 90 temps, we were so thankful to have AC working again.

Keith Scherer

We have used Reliable Heating and cooling for all of our heating and cooling needs. We needed some water heater work and Ralph came out and took care of it right away. Ralph was very professional and knowledgeable. He got the job done very quickly and everything is working great! I always recommend Reliable to family and friends. They truly are Reliable!

Chris Lopez

We had a emergency water leak problem with our AC unit in the basement of our recently purchased condo. Called Reliable and Derrick was there within a couple of hours. He was polite, knowledgeable, and friendly. Derrick quickly found the problem and repaired it. He also checked the system overall, pointed our some concerns and answered all my questions. I can’t say enough about how satisfied we were with Derrick and Reliable Heating & Cooling! We would definitely recommend them!!! Thanks again!!!!

Terry Mills

Had a small gas leak for a property I was helping a friend sell and we found out late last night. We reached out to Reliable H&C and Derrick was over first thing in the morning. He was friendly, professional and knowledgeable. He answered my questions with a smile. Derrick was a rock star. Will absolutely call him again. Bravo

Connor Kapp

Central Air Repair

24 Hour AC Service

Central Air Conditioning Service

Creve Coeur, MO