Hours: We are open 24/7

2183 West Terra Lane, O'fallon, MO 63366

(314) 513-0385

How can we help?

In order for your heating system to handle the long, tough winters in O Fallon, MO & surrounding communities, schedule fall maintenance from Reliable Heating and Cooling.  Our NATE-certified technicians optimize rewards and minimize problems, protecting you from unnecessary costs, disruption, and safety risks.  Whether you’re considering a comprehensive maintenance plan, or year-by-year upkeep, Reliable Heating and Cooling adheres to proven effective strategies, getting absolute peak performance from all makes and models of heating equipment.  Having earned distinction as a Carrier Factory Authorized Dealer, we consistently meet exacting standards for business practices, customer approval, and technical know-how.

Efficient heating service when you need it most!

Annual troubleshooting addresses minor issues before they become major problems, limiting repairs over the lifetime of your furnace, boiler, or heat pump.  Rather than reacting to sudden malfunctions, you choose a convenient appointment time.  Rather than dealing with hazardous conditions, property damage, or loss of heat, you enjoy complete peace of mind and total comfort.  You can also expect the system to last significantly longer and maintain higher efficiency levels, which adds up to lower cost of overall ownership.  And by scheduling proactive service in the fall, there’s plenty of time to install any necessary replacement parts.  To restore factory expectations for sound, efficiency ratings, and durability, Reliable Heating and Cooling relies on genuine Factory Authorized parts when possible.

Professional Heating Service Throughout O Fallon, MO & surrounding communities

Whatever type or age of heating equipment you rely on, it will heat your home more effectively and economically with regular, professional maintenance.  Not only can procrastination void your warranty coverage, it leads to the buildup of dust, debris, and contaminants on the internal workings.  Blocked airflow, friction, wear and tear, overheating, polluted air quality, carbon monoxide poisoning, shortened lifespan, and insufficient comfort, are some of the potential consequences.  You will certainly notice elevated sound of operation, higher energy bills, and a decrease in heating capacity.  Fortunately, the solution requires nothing more than a phone call to Reliable Heating and Cooling.  We make it simple, quick, and affordable.  We also make sure that every important step of your heating maintenance is performed accurately and with care. We offer you a variety of service plans to meet your exact requirements, and each one can be personalized with the addition of air quality accessories.  Contact us and speak to a friendly representative of our team for more information, convenient scheduling, and skilled service.   Reliable Heating and Cooling is a name you can trust.

Heating Maintenance & Heating Service in O Fallon, MO

At Reliable Heating and Cooling We Offer a Variety of HVAC Services:
Heating Repair
Heating Installation
Air Conditioning Service
Air Conditioning Repair
Air Conditioning Installation

Furnace Maintenance, Heater Maintenance, Furnace Service & Heating Service O Fallon, MO, Saint Peters, MO, Lake Saint Louis, MO, Wentzville, MO & Saint Charles, MO

Heating Maintenance & Furnace Maintenance in O Fallon, MO

Heating Maintenance ∴ Wentzville, MO ∴ O Fallon, MO ∴ Saint Charles, 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.


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

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

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

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!

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