Our air conditioning wasn't blowing cold air, so we called Nicholson. The technician showed up…read moreright on time, was professional and quick to address the problem. We couldn't have been happier with the service provided, and will definitely call Nicholson for all our future heating/cooling needs!

From the owner: At Nicholson Heating & Air, our core beliefs lie in ideals that other companies…read morehave long-since given up on. We believe in on-time service, every time. We believe in treating customers with respect and educating them so they can make informed decisions. We believe in transparent pricing policies. We believe in treating your family the way we would want to be treated. We believe in giving back to the community that has given so much to us. And mostly, we believe in elevating you—the customer. From the initial service call to the moment we walk out the door, our goal is your complete satisfaction at every turn.

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.

Craig and Brandon came out promptly, the same day as my phone call and gave a thorough inspection…read moreto our heating system.

Would love to give this company 10 stars…read more We have our unit serviced twice a year but of course during the hottest days in August 2024 that's when we experienced problems. Outside temperatures almost triple digits with heat index well past 100-105. On Tuesday night at 9:30 pm we get a message from our smart thermostat that instead of keeping the house at 73 degrees it was now 78 and we needed to contact Koppeis. I called at 8 o'clock on Wednesday morning for a service call. Due to the extreme heat wave the best I could get was afternoon Friday. Well, I took the appointment. Received a call Wednesday afternoon and we were moved up to Thursday early afternoon. WOW... the technician got here about 1:15, same guy we had for our routine checkup in the spring so he was knowledgeable with our setup. He checked the outside unit; capacitor out; under warrenty; switched it out; checked out rest of the unit and was gone about 2:05. Love these guys. The temperature in the house had gotten up to 85 before the service call. Now at 4:15 we are at 78 and still dropping. Nice. I would whole heartily recommend Koppeis for any of your heating and/or COOLING needs. GL Rawson

I couldn't be more satisfied with the customer service I received today from service technician,…read moreMike and his partner. They were considerate of my time, calling me before arriving to the house. They were both polite and courteous on arrival. Mike educated me on the system in our newly purchased home. He gave me information regarding the type of system, maintenance tips, troubleshooting, and potential issues years to come. I will definitely use Koppei's for my future heating and cooling system needs. Thank you.

Rich and Kelli are great people! Honest great communication and punctual!!! Affordable and they go…read morethe extra mile to get your HVAC back online!!!!

I was impressed with how promptly they came to service our AC. The repairman was professional and…read moreefficient. He had the needed part on his truck and made the necessary repairs so my AC was working again within 20 minutes. Thank you for a job well done and for keeping us cool on such a hot/humid day!

Fast friendly service will be using them for my HVAC needs from now on. Customer for liferead more

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.

Sean completed the job same day. He was thorough, friendly, and reasonably priced. Definitely…read morerecommend him.

Received a tune-up on furnace. Sean pointed out some future issues but made no hard sales pitch…read more Also no mention of membership or anything pushing of products. I asked questions and he was straight forward and responsive. Plan on using again in future.

Fantastic service! Very professional and helpful. From initial contact with Chris identifying our…read moreissues, to work performed by Kenny and Jay, everything was top notch. Would definitely recommend this company to anyone needing plumbing work done!

It was great from start to finish. Really dedicated to fixing the problem. All great people. so…read morefriendly and polite and helpful with any questions you have. They work hard to to get you in and get the job done!! I really appreciate all of them!

Warning....We are very disappointed in Sam and his lack of ethics. Sam replaced a new water heater…read morefor us February 2024 at our property in St. Louis City, MO. His bid says he is licensed. Not sure that's true. I am having a problem now with water leaking on the floor from an overflow from the heater. Sam talked to us July 3, 2025, we showed him pictures of the issue. Said he would be out asap to check situation. He blew us off. I'm sure because he knew he put it over the drain and blocked it. End of July 2025 and, after calling , texting, my husband calling, texting , I had to call a different company to come out and found out that Sam from Liberty Heating and Air moved the water heater to a different spot and over the drain so now I have to have it moved because water is flooding the basement and we have to put overflow hose in a bucket. This is going to cost$$$ Avoid Sam and Liberty Heating and Air Ridgetop address. He isn't a reputable service. Sam if you see this review and are honorable and properly take care of the problem you caused we will alter the review to reflect your ethics in correcting your mistake. Otherwise.......the value for your service is minus several hundreds of dollars and your name is mud. Shame on you. Well ,Sam is a good guy after all I said. He called me back, went to the property resolved the issue which turned out not to be a mistake he made but rather our tenant moving the overflow drain out of the drain. The other company said the water heater needed to be moved. Sam showed me proof he hadn't moved the location of the water heater from its original spot that it sat on for over 20 years. The other company could have put the drain hose back in the drain but chose not to. Another story. We are happy satisfied customers! I'd recommend Sam he is honorable. A happy ending.....

Replaced old well tank and controls along with bad water softener. Fair pricing for the high…read morequality work and experience. Was referred to from another quality HVAC company that Sam has plenty of experience with this type of water system. Will be using again for HVAC system as well and water heater

They took care of my old heat pump until it quit. Lately they put in an entire new system. A…read moresuperb upgrade, and they offer a twice a year maintenance to keep the new system in proper working order. I had zero problems dealing with their office or their technicians. They are prompt and communicate very well. I doubt they are the cheapest HVAC in the area, but they are top notch for equipment and service, which is what I wanted. I could say much more, but I am not writing a novel. I am happy with B F Mahn.

They got the work done in one day. So they were in and out. They told me they would not be…read morereplacing the dirt or grass seed or fixing the concrete and I agree to that with the quote $3400 But they were not neat or clean about their work. They used a backhoe and tore up a good portion of my yard and they cut up a big piece of concrete out of my driveway and dump it in the woods next to my house instead of taking it away with them. I have a friend that who is a plumber who told me he would use a trench digger to leave a small line in my yard and he would use a pump to spray underneath my concrete so he wouldn't have to tear it up. He was really busy with his work so he could not do the job for me.