Hours: We are open 24/7

2183 West Terra Lane, O'fallon, MO 63366

(314) 513-0385

How can we help?

When you’re in need of HVAC services in University City, MO, Reliable Heating and Cooling is where you find expert solutions and total satisfaction. We are a family-owned heating and cooling business begun in 1972 and continue to thrive due to quality of workmanship and customer care. Our years on the job prepare us for all challenges and ensure the resources, capabilities and determination to achieve swift and successful outcomes.

Professional Heating & Air Conditioning Solutions in University City, MO

Reliable Heating and Cooling upholds qualification as a Carrier Factory Authorized Dealer. We regularly meet exacting criteria for technician education, customer approval ratings and updated product knowledge. Our NATE-certified team specializes in the most-recognized and progressive heating, cooling and air quality technology on the current market, including high-efficiency air conditioners, furnaces, heat pumps, ductless mini-splits and the perfect fit for you.

Contact us for heating and cooling installation, service, and repairs

Get in touch at (314) 513-0385 for heating and air conditioning repair, replacement and maintenance. Schedule a convenient time to resolve indoor air quality concerns, issues with your water heater and a complete range of residential and commercial HVAC services. With prompt response, integrity of recommendations, competitive pricing and a never-quit attitude, Reliable Heating and Cooling makes sure you’re happy with everything we do.

Central Air Conditioning Service in University City, MO | AC Maintenance

AC Service, AC Maintenance, HVAC Service, Heating Installation & Heating Service in University City, MO

Central Air Repair in University City, MO | HVAC Service

24 Hour AC ServiceCentral Air Conditioning ServiceCentral Air Repair ∴ University City, MO

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Customer Reviews
What our customers are saying

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

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

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

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

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

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