Stay Cozy with Heritage Heating & Cooling
Our Awards
  • American Standard Authorized Dealer
  • BBB A+ Accredited
  • Home Advisor Screened & Approved
  • Nextdoor Neighborhood Favorite
  • Yelp!

    Serving O'Fallon and beyond Air Conditioning Service O'Fallon

    When it comes to your air conditioning system, regular service is the key to uninterrupted comfort and efficiency. Heritage Heating & Cooling’s comprehensive AC services are designed to keep your air conditioner in prime condition, ensuring it runs smoothly throughout the year.

    Thorough inspections and maintenance can extend the lifespan of your air conditioning system, while also identifying potential issues before they escalate into big problems or total breakdowns. Heritage Heating & Cooling’s AC services can also help make sure your system is running at peak energy efficiency.

    Heritage Heating & Cooling: Your Local AC Service Company

    As your local AC service company, Heritage Heating & Cooling is committed to protecting your comfort—and your wallet—with quality workmanship by licensed and insured professionals.

    Ready for top-tier AC service? Call (618) 356-2781 to schedule your next appointment with Heritage Heating & Cooling. We look forward to helping you!

    O'Fallon AC Service
    Call for More Information Today!
    618-356-2781
    Customer Reviews
    • C
      "Luke was prompt and courteous"
      Luke was prompt, courteous, efficient. Phone people are great also.
      C&C Realty
    • J
      "Great Service!"
      Friendly and did their absolute best.
      Joey Moore
    • D
      "Quick and Efficient"
      Tyler was on time, quick, and efficient. Took time to show me the problem and the replacement part.
      Demond Connors
    • O
      "Excellent service, keep you informed"
      Excellent service, keep you informed. I trust them to not overcharge.
      O'Fallon Relief Society
    • D
      "Outstanding job by Heritage Heating and Cooling"
      Heritage Heating and Cooling did an OUTSTANDING job. Their customer service was great.
      Don Long
    • B
      "Very Happy with the Service"
      Tyler fully explained the results of the service.
      Barbara Moore
    • H
      "Excellent service as usual"
      Prompt service from a local HVAC pro. Have been using them for 5+ years.
      H Lam
    • P
      "Fast, reliable, and professional service."
      Fast, reliable, and professional service. I will definitely be a repeat customer.
      Paula Grant
    • m
      "Can't beat the service"
      As always super service. Can't beat the service honestly and prices.
      michael weymouth
    • p
      "Highly recommend their services"
      Heritage’s techs are very professional and knowledgeable. Highly recommend their affordable services.
      pamala funk
    • s
      "Highly Recommend Calling Heritage"
      Tyler identified the problem right away and fixed it quickly on site.
      scottsl84
    • J
      "Great Service!"
      They came out within 24 hours to fix.
      Jeff Reedy
    • J
      "Highly recommend Heritage"
      Brian was well-trained and quick to answer all questions. Highly recommend Heritage and picked them because Veteran owned.
      Jeff Parker
    • S
      "Technician was courteous"
      Technician arrived earlier and was courteous and respectful.
      Steve Cruse
    • M
      "Prompt and Efficient Service"
      Tyler came to the house promptly and did his work efficiently.
      Mark Valenzuela
    • S
      "You have a customer for life"
      Colin went above and beyond to help me.
      Sarah S
    • J
      "Service was early, quick, and efficient"
      The service was early, quick, efficient, knowledgeable, and good-humored by Brian!
      Jo Apida
    • D
      "Heritage always is amazing!"
      The technician, Brian, was courteous and professional. He explained everything he was doing in terms I understood.
      Diane Chalberg
    • J
      "Colin was excellent"
      He answered our questions thoroughly and made the necessary updates to improve our furnace.
      Jared Kniepkamp
    • M
      "Awesome company"
      Awesome company, very thorough and been using them for about 10+ years.
      Michelle Kregeloh
    • J
      "Personable and likable man"
      Impressed with his understanding of the basics and ability to test all systems.
      John Moore
    • J
      "Highly recommend!"
      Heritage has helped us on more than one occasion when our heat or AC had completely stopped working.
      Jennifer Foster
    • L
      "Highly Recommend Heritage"
      I felt I received a very honest assessment.
      Lesa Carter
    • K
      "Colin did an excellent job!"
      Colin came out and did an excellent job!
      Kelly Harris
    • G
      "Brian is Awesome"
      Brian is awesome. Highly recommend.
      Gregory Cole
    • D
      "Excellent Service From Start to Finish"
      Very professional, trustworthy, and excellent service from start to finish!
      David Leisure
    • N
      "Colin Was the Best HVAC Guy"
      Colin was the best HVAC guy I've ever had. Courteous and professional, explained everything in detail I could understand.
      Nancy Davis
    • K
      "Highly recommend this company"
      The issue was resolved and we were up and running very quickly.
      Katie Rench
    • G
      "Excellent explanation of options"
      Colin was courteous and did an excellent job explaining the problem and the options to solve it.
      Gordon Wagner
    • J
      "He was here that afternoon"
      Tyler is pleasant, a good communicator, and very thorough.
      Jann Gillingham
    Luke was prompt and courteous
    Luke was prompt, courteous, efficient, will use this company again. Phone people are great also.
    C&C Realty
    Great Service!
    Great Service! Friendly and did their absolute best to get our system back up quickly.
    Joey Moore
    Quick and Efficient
    Tyler was on time, quick, and efficient. Took time to show me the problem and the replacement part.
    Demond Connors
    Excellent service, keep you informed
    Excellent service, keep you informed. I trust them to not overcharge.
    O'Fallon Relief Society
    Outstanding job by Heritage Heating and Cooling
    Heritage Heating and Cooling did an OUTSTANDING job. Their customer service was great. They communicated clearly and effectively every step of the way with texts, email, and if necessary, phone calls. The guys did an excellent job on the install! I had a major home install. They tore out the old AC unit, coils and all, and most of the duct work, installed a new unit, and reconstructed the duct, making the system run more efficiently and effectively. The job was done in three days, saving me a lot. I can't say enough about Jim, Larry, and all the team at Heritage. Thank you!
    Don Long
    Very Happy with the Service
    Tyler and Luke arrived during the scheduled appointment time. Both were respectful, willing to answer my questions, and efficient in servicing my AC system. Afterwards, Tyler fully explained the results of the service, which he does every time. His input helps me understand what is normal and what isn’t when it comes to my AC efficiency. I am very happy with the service performed.
    Barbara Moore
    Excellent service as usual
    Excellent service as usual. Prompt service from a local HVAC pro. Have been using them for 5+ years to maintain system and haven’t had any issues through brutally hot summers and freezing winters.
    H Lam
    Fast, reliable, and professional service.
    Fast, reliable, and professional service. I will definitely be a repeat customer.
    Paula Grant
    Can't beat the service
    As always super service. Can't beat the service honestly and prices. Recommend over any other service company I've ever done business with.
    michael weymouth
    Highly recommend their services
    Heritage’s techs are very professional and knowledgeable. Highly recommend their affordable services.
    pamala funk
    Highly Recommend Calling Heritage
    I called Heritage, and Tyler came out within hours of my phone call, identified the problem right away, and fixed it quickly on site. He even showed me how to read my system’s error codes so I can see what’s going on if anything ever happens again. I highly recommend calling Heritage if you have an HVAC problem.
    scottsl84
    Great Service!
    We had an issue with the outside unit not defrosting, and they came out within 24 hours to fix. Great service!
    Jeff Reedy
    Highly recommend Heritage
    Happy with quick response fire help. Brian was the tech who worked on the furnace. Very well-trained and quick to answer all questions. Liked his honest, forthcoming demeanor. Highly recommend Heritage and picked them because Veteran owned. Got lucky in this random pick of vendors.
    Jeff Parker
    Technician was courteous
    Technician arrived earlier at the given time. He was courteous and respectful.
    Steve Cruse
    Prompt and Efficient Service
    Tyler came to the house promptly and did his work efficiently. He did a good job explaining what he did for annual maintenance of our furnace. The payment options were reasonable.
    Mark Valenzuela
    You have a customer for life
    They are amazing. I called them this morning and someone answered. They were able to have a technician out within a few hours. Turns out my HVAC is fine; the issue was a roof issue. Colin went above and beyond to help me. You have a customer for life. Thanks!
    Sarah S
    Service was early, quick, and efficient
    Brian let me know he was in the area with another customer; a text was sent to let me know when he was on his way. The service was early (Yea!), quick, efficient, knowledgeable, and good-humored by Brian!
    Jo Apida
    Heritage always is amazing!
    Details of when they would be arriving were shared. The technician, Brian, was courteous and professional. He explained everything he was doing in terms I understood. Heritage always is amazing!
    Diane Chalberg
    Colin was excellent
    Colin was excellent. He answered our questions thoroughly, informed us of the issues we were having, and made the necessary updates to improve our furnace.
    Jared Kniepkamp
    Awesome company
    Awesome company, very thorough and been using them for about 10+ years.
    Michelle Kregeloh
    Personable and likable man
    I stayed with Brian throughout the visit. He impressed me with his understanding of the basics and his demonstrated ability to test all the systems. A very personable and likable man. He fielded all my questions and his answers were couched for the non-professional person. Much appreciated.
    John Moore
    Highly recommend!
    Heritage has helped us on more than one occasion when our heat or AC had completely stopped working. On one occasion, a tech came out right after we got a bunch of snow, slip-slided around our neighborhood before the plows ever made it to us, and had us up and running quick. They have gone above and beyond so many times for us. Highly recommend!
    Jennifer Foster
    Highly Recommend Heritage
    Brian was very polite. I felt I received a very honest assessment of the situation. He fixed my immediate problem and showed me what to watch for in the future so I can plan for it. It came away a lot less expensive than I expected. I will definitely recommend them to anyone I know needing HVAC service. Colin and Tyler followed up today and installed my new HVAC system. I cannot say enough compliments about these men and this company. The price was very reasonable. The men were very knowledgeable. They had to move my water heater out of their way to do the job and then reattach all of that (and didn’t complain at all). The job was finished before 4 pm (arrival time just after 8 am or so). They left the area spic and span clean. My house is nice and cozy while it’s 20 degrees outside.
    Lesa Carter
    Colin did an excellent job!
    I contacted Heritage Heating to perform a furnace tune-up. Colin came out and did an excellent job! He explained the process in great detail.
    Kelly Harris
    Brian is Awesome
    Brian is awesome. Very repeatable of property and ownership. Highly recommend.
    Gregory Cole
    Excellent Service From Start to Finish
    Very professional, trustworthy, and excellent service from start to finish! It’s tough to find a company that can honestly deliver on all three these days the way Heritage does!
    David Leisure
    Colin Was the Best HVAC Guy
    Service was great, especially on a 25-degree day. Colin was the best HVAC guy I've ever had come to the house. He was courteous, professional, and explained everything that was wrong and what he fixed in detail that I could understand! I will be a lifetime customer.
    Nancy Davis
    Highly recommend this company
    I can’t recommend this company highly enough. We woke up this morning with our thermostat at 64 and falling. It is 27 degrees with snow falling outside and I have young kids in the house. They got us in today and were here earlier than anticipated. The issue was resolved and we were up and running very quickly. The technician was incredibly kind, professional, and knowledgeable. The front office was as well when I called. They have our business if we ever need the help again. Also, they offer a military discount which they don’t have to, but it is incredibly kind to do.
    Katie Rench
    Excellent explanation of options
    Colin was on time, courteous, and did an excellent job explaining the problem and the options to solve it.
    Gordon Wagner
    He was here that afternoon
    We had an issue the day before Thanksgiving and called Heritage. Tyler is our technician, and he was here that afternoon. He takes great notes, is pleasant, a good communicator, and very thorough.
    Jann Gillingham
    Why Trust Our Services?
    • Family-Owned Since 2011

      Providing HVAC solutions with personal care.

    • 24/7 Emergency Services

      HVAC support whenever you need it.

    • Expert Technicians You Can Trust

      Background-checked and highly trained staff.

    • Special Discounts Available

      Veteran, military, and senior discounts offered.

    Common Areas We Serve
    • O'Fallon
    • St. Clair County
    • Belleville
    • Fairview Heights
    • Collinsville
    • Swansea
    • Shiloh
    • Granite City
    Call Us Today! 618-356-2781
    or Contact
    We’re Here to Help
    • By submitting, you agree to receive text messages from Heritage Heating & Cooling at the number provided, including those related to your inquiry, follow-ups, and review requests, via automated technology. Consent is not a condition of purchase. Msg & data rates may apply. Msg frequency may vary. Reply STOP to cancel or HELP for assistance. Acceptable Use Policy