Harmonic Heating and Air Conditioning is the BEST!!! Our AC…read moredied and after another company told us that our unit could not be repaired and had to be replaced ($6,000), we contacted Harmonic for a second opinion. Daniel the service technician opened the unit up and tested everything. He took the time to explain what he was doing and why. He discovered a bare wire that had been chewed (possibly by a mouse) and was touching the metal housing which tripped the circuit breaker. Daniel replaced the wire and the unit is working perfectly. The honesty and integrity of this company is refreshing. We will not hesitate to use them again and recommend them to all our friends.

Stay away from this business! My entire cooling and heating system was left in an inoperable state…read more I called for a diagnostic of the air conditioner today because cool air isn't coming from the vents. I was told the diagnostic would cost $149. I asked to be informed of any repairs that had to be done. Technician checked the system and recommended replacing unit. We discussed replacement unit and cost. I was ready to pay deposit. In the next 10 minutes I was told that the model I selected is old and not available. New model costs $1000 more. I asked for a proposal to decide later. Technician told me that the visit costs $396. He said that he fixed air conditioner that was not working. He never told me that he is fixing anything. Through our the visit it looked like he was figuring out the problem. I talked to the owner and we agreed that any repairs that were done will be undone so that I do not have to pay for repairs. Then the technician removed all the wires from the board making both heat and fan unusable. He did not just undo the "repairs", but made entire system unusable including fan and heat which were working before his visit. See the photos to show what was done!

On Saturday May 18th, after 25 dutiful years, our AC finally died, and on the day of our son's high…read moreschool graduation. Needless to say, it put a damper on the festivities. I called 4 different companies, and no one would come out until Monday. Well nobody, except for Ivan, of Precision Air, who came out on Saturday night at 9:00 P.M. I couldn't believe it! Ivan came out and thoroughly walked me through my different options for both a new AC and possibly a new furnace as well. Additionally, he carefully explained the financing terms and explained clearly how to avoid the financing trap and to pay off everything before 25 months to avoid a compounding of all interest. After spending less than 30 minutes with him, I knew he was the man for the job, so I signed the contract and cancelled all the other companies the next day. Since Precision's prices were so fair, I ultimately decided to replace both the AC and furnace. On Monday, such an unbelievably short turnaround, Ivan's guys were able to replace not only my AC, but also my furnace. My husband was at work and I was a little nervous without him being there. However, everything went great! Stevan and Jeremy were both very polite and checked in with my wife throughout the install. They were here for over 7 hours, and completed the job perfectly. We are extremely happy with everything! Getting a new AC and furnace is an extremely stressful experience, but Ivan handled everything perfectly for us. I am 100% satisfied with Ivan and Precision Air and strongly recommend them to everyone. Another bonus for me was being able to support a true local small business, not some big guy with a satellite office in town. Thank you Ivan and Precision Air!!!

From the owner: Expert HVAC services in the Chicagoland area and beyond--offering reliable heating, cooling, and…read moreair quality solutions for your comfort all year round.

Travis is THE guy that you want when it comes to heating and cooling issues. He will not try and…read moresell you anything you don't need. Trustworthy and honest. Goes above and beyond. Just a really good guy! Ps: if your considering going into this business this is the guy you want as a mentor.

I needed a humidifier installed in new construction home. I'm extremely pleased with my experience…read more They explained things patiently and thoroughly. When they came for the install, they informed me that the original humidifier was not the best fit. Rather than installing it just to get the job done they paused. They recommended a different option that was actually a lower cost and that they would have to come a different time to install it. This shows their dedication to customer satisfaction and making sure the customer has the best product to address their needs. Highly recommend them.

I got a prompt response to my request with a quote for diagnostic, which would be waived if I…read moreproceeded with the repair. They do provide the service requested and gave me a link to make an appointment. We'll see how things go in a couple of days. The repair man, Alex, was prompt and identified the problem - two problems, actually. He was able to get the dryer running again, better than it had been. Reasonable price

Really professional and transparent. They are open about the things that are needing service and…read morehonest about what genuinely is required vs recommended. In some instances they've waived extra work as they fix issues they find that were not originally quoted.

I've used this company for many years…read more Very fair pricing. Reliable. Will come out in an emergency.

Steve and his team are incredible at what they do and we were very fortunate to find their HVAC…read moreservices. They have done multiple installs for us, including AC and whole home humidifiers, along with annual routine maintenance and we have been ecstatic with the attention to detail and turnaround time. Highly recommended if you're looking to upgrade your HVAC or even have some routine services to keep everything running smoothly. Best, Charlie

Great service and consistent quality. We used them for servicing our 20 yr old furnace/AC and…read morerecently upgraded to new, modern efficient units.

Always on time; fair pricing, friendly and excellent service. Tech Hugo did a great job cleaning…read moreand adjusting my system.

Our A/C went out on Thursday, 7/2. Called around 6pm to see what they could do. By 2:30-3pm on…read moreFriday, 7/3, Kaleb W was at our house, diagnosed and fixed the problem and was gone within 20 minutes! We LOVE TR Miller and recommend them to EVERYONE!!!!!

We couldn't be happier with the service we received from TR Miller. We had an air conditioner…read moreemergency leading into one of the hottest spells of the year and not only did they send a tech out the same day we called they were able to get someone out for a full estimate also that same day and do the install the very next business day. Everyone we worked with was extremely professional and courteous. This is the second time we've used them and we are lifelong customers.

They responded promptly and finished the job--snaking out my clogged floor drain-- at a fair price…read more Gonzalo was friendly.

Jeromy was ultra knowledgeable and gave excellent recommendations that we needed! Scheduling was…read moreeasy and dependable; outstanding communications made it perfect. The guys were careful moving large heavy furnaces through our narrow hallway. At the completion, the furnace room was spic and span cleaned up, a nice treat. We also subscribed to their economical maintenance package, which will make our lives purr along in the future. Thank you Jeromy and Angel!