My fan blower on my A/C died to an Ameren power surge. I called Comfort Works and got Luke who…read moreanswered the phone. I did not have to go through a line of people to get some information. He was kind, informative and promised me an appearance the same afternoon. His technician, Matt arrived on time and found my problem within a few minutes. He did not have the replacement part but assured me that he would order it and possibly put it in the very next day. Today is the very next day and he just completed his job. He left no mess, showed me how to clean my "complicated" filters and went on his way. If you ever have A/C issues... You are foolish not to start with these gentlemen.

From the owner: ComfortWorks Heating and Cooling supplies all of your heating cooling needs, from air conditioner…read moreand furnace repairs, installations, and preventative maintenance, we can handle it. We are your local family owned heating and cooling technicians serving St. Charles and St. Louis counties!

Jerry Kelly installed our new HVAC System in November 2017 and has been taking excellent care of us…read moreever since. Today their very personable technician, Dillion came out to check, maintain and clean our A/C unit. Dillion did a great job, very professional, friendly, engaging and thorough. We truly appreciate everything Jerry Kelly does. We highly recommend them for your heating and cooling needs.

In Sept 2026, during extreme heat, a Jerry Kelly technician diagnosed our non‑working A/C as having…read morea seized compressor and said repairs would exceed $6,000. We were then given a handwritten replacement quote on notebook paper with no brands listed and only vague "standard" vs. "high efficiency" categories. The quotes ranged from $19k-$23k, and we were pressured to make a decision immediately. When we said we planned to get other quotes, the lowest price suddenly dropped to $14k -- an immediate ~30% reduction that made it clear the original pricing was heavily inflated. Our home was over 90 degrees inside, and the only option offered was next‑day full system replacement. We called another HVAC company for a second opinion. Their technician found no seized compressor -- just a failed capacitor -- and repaired it within minutes for a couple hundred dollars, restoring cooling within an hour. He also arrived with a portable A/C unit to ensure our comfort if the repair wasn't possible. Jerry Kelly did refund our diagnostic fee and Maintenance Club membership after I contacted them, but consumers should be aware of the high‑pressure sales tactics, questionable diagnostic practices, inflated pricing, and the importance of getting a second opinion before agreeing to major HVAC repairs or replacements.

Always quick to react, and they dont try to push any unneeded parts or services…read more Mike and Dave have always done us a great job.

Our air conditioning went out in the evening during the last week in June when everyday was in the…read more'90s. We called this company the next morning and their service tech came out that afternoon. He repaired our 8-year-old air conditioner relatively quickly by replacing a bad capacitor and a cost that was very reasonable. The service tech was not very talkative and hopefully was just having a bad day (it was horribly hot) but he did the job we needed which was very appreciated!

Tim is very knowledgeable. He's easy to talk to. He explained everything that was wrong and he…read moreexplained everything he fixed. We are very pleased with his work.

We had a tankless water heater replaced. Paul was knowledgeable, kind and clean! He did a lot of…read moreextra work to get the new water heater covered from the previous warranty. We are very grateful for his help. Also, we have hot water again! Would definitely recommend and use again in the future.

Eureka Heating and Cooling did an excellent job replacing our HVAC air filters. The work was…read moreprofessional and done right. Special thanks to Tiffany at the front desk -- she was extremely professional, prompt, and made communication between our businesses seamless. Highly recommend them!

The following is a honest review of Aireserv Eureka a company that has stumbled in their service…read morenearly from the moment we bought an Amana HVAC unit from them in August of 2024. The original much more critical 1 star review is below and it is all still very true but they have as of mid August 2025 rectified some of their errors by honoring repairs and warranties that Amana refuses to honor. Does that completely erase all the errors that have been made along the road? Honestly no they do not, but I appreciate that they are currently doing their best to repair what was wrong. They very well might be a very good company but my wife and I's recent experience has been rocky at best. Update to a 3 -3.5 star rating. THIS IS THE ORIGINAL 1 STAR REVIEW. : Based off of positive reviews on Yelp and Google my wife and I chose to buy a new HVAC unit from Aireserv Eureka in August of 2024. In no less than 3 MONTHS our unit broke down, something was literally smoking, due to a failure to install the unit properly. Then in March of 2025 we discovered that they installed a unit that for natural gas, which we do not have, instead of propane WHICH THEY SHOULD HAVE KNOWN SINCE THE PIPES ARE APPARENTLY VERY DIFFERENT. So yet another overhaul was made. Then in June of 2025 we started to notice the coldest we could get the house was 75 degrees. So we called for another checkup and they "supposedly" fixed it, saying it had been improperly calibrated during installation. But one month later, in July, our unit broke down AGAIN. This time completely, leaving our house in the 90s. Now as I right this in August of 2025 THE HOTTEST PART OF THE YEAR they have yet to fix my unit. Week after week, yes you have read that correctly, it has been weeks since we called them to fix our unit, we have had to call them over 20 times. So far we are at week 3 and moving soon to 4. Airserve Eureka's horrible service has so far consistented of misdiagnosis, instillation of wrong parts, incorrect calibration of the unit, and long waits (4+ days) while a part ships. They have given an excuse for everything, always blaming someone else (Amana). According to them, none of this is their fault. They are playing the victim of corporate manufacturing. But, why would you want to reach out to a company who has no control over the services they offer? We then said, since there are so many issues with my unit from the start and I am still under warranty, why don't they just install a new unit. So far they have refused to honor the warranty because Amana won't. I'm not writing this bad review out of spite but as a civic duty to report incompetence in what is falsely sold as good. I hope those of you reading this heed my warning about Airserve Eureka. They are just plain terrible. UPDATE: In mid late August 2025. Aireserv Eureka decided to ignore Amana's horrible lack of honoring our warranty and installed a new RUUD unit. Let's hope this goes better than this last year's trials. I'd definitely not recommend Amana for a future HVAC regardless of the positive reviews they have online. Eureka honestly doesn't deserve a stellar 5 star review but they have tried to do right currently so perhaps they again as mentioned above deserve more a 3-3.5 Star rating.

As you can see from my previous review, we've always had great experiences with Jake. Every time…read morewe've spoken with him, he's been kind, patient, and thorough in answering all our questions. Jake even took the time to explain different packages. Originally we weren't sure which one to choose but Jake spoke highly of each one not making us feel less then for not choosing the highest or making us feel the lowest package was bad. If you know what I mean. When contractors try to upsell. Jake was thorough with all and the positives of each. There was a misunderstanding with the system we chose since we wanted zoning for specific rooms, but Jake quickly upgraded our equipment at no additional cost. He went above and beyond to resolve all of our concerns and even helped connect us with an additional contractor to address the lack of insulation above our garage. Overall, Jake has consistently provided excellent service and support for our family, our needs and our home.

We bought a home and had air flow issues. Nobody could figure it out. Tristen arrive, within 1 hour…read moreour issue was addressed and resolved this was when we had the real cold problem and woulad have frozen. I would recommend this company all day long. Request Tristen

Jeff was very helpful and respectful he went out of his way to help us with everything that we…read moreneeded he was here on time he explained everything very well and just all around a great person to have working on your furnace and air conditioner he went out of his way to help us in every way thank you Jeff I refer anybody and everybody to use illy hvac

From the owner: Whether you're dealing with the heat of summer or the chill of winter, you depend on your heating…read moreand air system to keep you comfortable. When unexpected problems strike your home, turn to Illy HVAC in St. Peters, MO. This locally owned and operated HVAC contractor carries more than 30 years of experience in the field. Their talented technicians take pride in offering custom solutions, affordable rates, and excellent customer service. As a trusted HVAC contractor, this hometown team will exceed your expectations with timely furnace and air conditioning repairs. Seasoned technicians use the latest technology and years of expertise to fix issues with blower belts, flickering pilot lights, and worn-out ball bearings. No matter the make or model of your system, they design a personalized plan that targets the source of your troubles. If your furnace or air conditioning unit is beyond repair, take advantage of Illy HVAC's reliable installation services. Residential clients will enjoy access to energy-efficient products from Coleman®, a name-brand manufacturer. You can also pair your investment with a separate 10-year warranty plan. Routine maintenance is available on an annual and seasonal basis. Knowledgeable staff members will arrive at your home to conduct in-depth inspections, remove dirty filters, and update broken thermostats. Feel free to ask them questions regarding air purification devices and humidifiers...

I cannot be more thankful for Comfort Experts over the years! thank you Kelli for helping with the…read moreurgency during a 90+ degree day and fixing OUR mistake

Awesome service at a good price. The employees were professional and wanted to get the job done and…read moremore importantly get the job done right.... the first time. A+ review

Very great service overall but following up after an AC repair to ensure the fix was done right was…read moreabove and beyond!

Had a bigger Hvac company start servicing my new homes unit- the AC stopped working- the guy came…read moreover and said "it's an electrical wiring thing, but I don't have time to figure out what's wrong. It's too complicated. You need a new system anyway- it's old" said I needed a complete replacement because they can't service my air conditioner anymore - wanted to sell me a $10k unit. Branden came over and did a long look at my unit and agreed that it was an electrical thing- apparently he WAS willing to figure out what was going wrong- got it going again and said when it stops working again to call him so he can figure out where the wiring needed replaced. Spent a long time at my house. Well, it went out a month later and he came over and did everything he could to figure out where the wiring problem was. Took a couple visits and lots of trial fixes. Said he could service my AC just fine in the future and fixed the issue- everything working again. He also has lots of options for when I do need to replace my older system- but it's not now. Very conscientious, very knowledgeable and very patient and tries very hard to fix the problem without taking shortcuts and not wanting to do the work cares more about the customer than making a big sale.