Hours: We are open 24/7

2183 West Terra Lane, O'fallon, MO 63366

(314) 513-0385

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HVAC Service for St. Louis, MO

Reliable Heating and Cooling is your expert source of HVAC services in St. Louis, Missouri, supporting modern innovation with the knowledge gained by way of extensive hands-on experience. We continue more than five decades of providing satisfying, successful and sustainable solutions to year-round temperature control. Contact us by way of our quick and simple online form or call us at (314) 513-0385 for information and scheduling of residential and light commercial assistance, including 24/7 emergency repairs.

Trust our Team of Professionals

Our team of NATE-certified, ACCA-certified, factory trained technicians are prepared for all challenges. By meeting the strict standards of a Carrier Factory Authorized Dealer, we answer heating, cooling, ventilation and indoor air quality needs with energy-efficient, “green” options. We get excited to share the advantages of Greenspeed intelligence, adaptable-speed technology, zoning and all sorts of features that make everyday life more affordable and comfortable.

Contact Reliable Heating and Cooling today!

From new installation and replacements to seasonal maintenance and repairs, Reliable Heating and Cooling is always the right choice for every make, model and style of residential and light commercial equipment. Water heaters, furnaces, air conditioners, heat pumps and ductless mini-splits are a small sample of our proficiency. Fully licensed, bonded and insured, Reliable Heating and Cooling serves your best interests with unmatched determination and dedication. Trust us to deliver satisfaction on every job.

AC Service, AC Maintenance, HVAC Service, Furnace Repair & Air Conditioning Replacement in St. Louis, MO

Central Air Conditioning Service in St. Louis, MO | HVAC Service

Central Air RepairCentral Air Conditioning Service24 Hour AC ServiceHeating InstallationHeating Service ∴ St. Louis, MO

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Customer Reviews
What our customers are saying

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

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

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

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.


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

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