Welp, it doesn't get much better than this. I called Williamson after trying Illiana the same day,…read morehoping Williamson good send someone right away (Illiana couldn't make an emergency call and we needed someone here before we left for work). The technician called me back immediately and stopped by us on his way to another job within 30 minutes of the call. They were in and out within 30 minutes, replacing our 2nd capacitor for $100 less than Illiana charged us for the exact same part last Summer. I am happy to be working with a small, local business, and now I'm never turning back. Thank you Williamson!

Wayne is great. He has done a bunch of heating certs and repair work for me. Straightforward, fair…read moreprices, and quick service. They work in the south suburbs and Indiana as well.

I would highly recommend Air Source 1. Several weeks ago, Tim and his Team did an excellent job…read moreinstalling an air conditioner and furnace in my townhouse. All gas lines, electrical hookups, evaporator coil connections were done well as well as the outside air conditioner connections. All work byproducts were removed leaving a clean work area outside as well as inside. This was not surprising as Tim and his Team installed two high efficiency furnaces and air conditioners back in 2016 with similar results. Thanks Tim!

When I had my air conditioner serviced in the spring the guy was very honest that I needed a new…read morecapacitor. He showed me the test and I know my way around air-conditioning units. He didn't try to upsell me to a new unit. Family run. Would definitely use them again.

STI Heating & Air Conditioning saved me so much money! I had another HVAC company looked at my…read morecentral air unit because it was blowing lukewarm air. The other company told me I needed a new compressor for $1699 and they took only cash. After a repairman ran off with $453 of my aunt's cash, I decided I did not feel comfortable giving the HVAC repairman $2000 (with labor) in cash. So, I told him I would seek a second opinion. I called STI Heating & Cooling who were booked for the week so I made an appointment for the following week. Ted arrived on time and was very professional. He took a look at my unit (which is 42 years old) and told me I needed a Hard Start Capacitor for $173. He also checked the amount of Freon (R22) told me I might need a little. He installed the capacitor and added a little Freon and my unit start blowing extremely cold air. Ted's work was great! He told me his father had an old unit like mines and he keeps him father's unit working. I told Ted the other repairman thought I needed a new compressor and Ted suggested maybe the other repairman was not familiar with older units like mine. I am SO glad I called STI Heating & Cooling! I told Ted they are now my go-to company for ALL my HVAC activities. I would highly recommend this company - they proved to be a huge money saver for me.

It's good to meet good people, the person that I talk to in the office was very helpful said she…read moredidn't have an opening but called me back when she did, the technician was straight forward and matter of fact not only did he fix the problem but inspected the whole furnace before leaving great value and completely worth it!!!! Any furnace issues I'm calling STI first!!!!

Quality work and the install was fast. Steve stayed til the job was finished bring warmth and heat…read moreon a cold day. Thank you.

Steve's work is fantastic and I'm recommending him to everyone I know…read more Our furnace went out this year, and it ended up being in need of some major repairs (cracked heat exchangers). I asked around and got a strong recommendation from a friend for Smart Move. I'm so glad I did. They helped us out, sourced all the parts we needed, and coordinated an inexpensive but very thorough repair. Steve and his team did great work quickly and at a fair price. They're friendly, helpful, and they're happy to discuss technical details with interested nerds like me. But more importantly, our house is very comfortable and we feel safe thanks to the thorough repairs Smart Move made. Thanks so much!

Requested a HVAC and Furnace tune up through the yelp projects…read more Quick response and got us on the schedule. They came out today and the tech was great, checked everything out. Happy with the service and would recommend to other. We will be repeat customers in the future

Timely, friendly and knowledgable repair team. Thanks for helping me out in less than 24 hours.read more

We had just moved to NW Indiana and bought a home. The air went out within 2 weeks of us closing on…read morethe house. The home warranty wouldn't cover it. Our neighbor recommended Mark Collins and his company. The store opened Monday at 7. I called at 7:15. Mark ( the owner) answered the phone. Owners answer the phone? I love it! He was very sympathetic to my needs. He apologized and said he couldn't get out there until 9:30 am that morning! That's a window of 2 hours! Dont apologize Mark- I'm beyond happy. Mark showed up as promised and gave a quote for a new unit. He wasn't pushy and he didn't try to oversell us with a larger more expensive unit. He left pamphlets of models for us to look at. We called Mark back that afternoon- we decided to have him install the new AC unit. Again, he was apologetic. He wishes that he could install it that day- but couldn't. Instead, he could install it the next day- Tuesday. He said he carried that unit in stock. As promised, Mark and another man showed up on time in a company van. They removed the old unit and installed the new one in a timely fashion. He went over all of the features of the unit and showed me what he removed and replaced. They were quiet and neat and didn't leave a mess. We turned on the AC unit and we had Air conditioning. The unit is purring like a champ! A few days later, we get a "thank you card" in the mail from Mark and Collins Heating and cooling! Who sends out thank you cards anymore.... Collins heating and cooling does! This is a very small personable company that can tend to all of your needs- night or day. When our furnace goes out- Mark will be replacing that unit too!

Mark came out on a holiday weekend as our AC was not cooling. He was able to quickly diagnose the…read moreproblem and repair it on the spot. Mark walked me through every step of what he was doing, and within a half an hour our AC was pumping out cold air again. I would HIGHLY recommend Collins to anyone. They truly want to help their customers and not just sell unneeded items. Easily a 5 star company!

fast and efficient service. Quality work. Very knowledgeable staff. better than fair price…read more Thanks, Mike and Jeff!

Without a doubt call Naughton for HVAC needs. They were friendly, helpful, and the service was top…read morenotch. They came much cheaper than I was quoted from another company and a repairman was here in 15 minutes.

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!

Had a Service Tech (Tony) from Illiana Heating and Air out today to perform the annual maintenance…read more Tony was in communication prior to his arrival as to his ETA. He was very thorough on his inspection of the furnace and followed up with a Q& A when completed. Liked that he put on booties when entering the house as to not track on the carpet. Would also include that the office personal were very professional when I made the appointment.

What a wonderful experience as usual. Our technician Donald was very knowledgeable and helpful…read more Very pleasant and answered all my questions.

Merts was recommended to me by my father in law when our heater and fan was busted. It was a hot…read moresummer in 2020 when we called them to take a look at it. The guy let us know that the fan was broken and was able to push the cold air through our condo. Plus the fan was in the heating unit which was so old. He gave me an estimate which and gave me some time to review it. We decided to have them install a new model. They were able to schedule us in quickly early in the morning. The only reason why I didn't give them a 5 star was because it took at about 4 hours. I personally don't know how long it takes to replace a heating unit, but I felt that was kind of long. Again, I've never had this work done so maybe 4 hours may be fast to the average heater replacement work. They were nice and respectful of our home while they worked. Bless them for working in the heat. Regardless they got it in there fine and stayed to make sure it was working and that it cooled our condo. They even explained to me how to replace filters. I paid them in full for their work, I got all the paperwork and they were on their way. If I have any other issues, I would definitely call them up again.

Very disappointed. Technician left clamps inside our furnace so the heat wouldnt turn off. The gas…read morefurnace kept running and running and running even when the thermostat was turned off. Didn't matter that the temp was set to 72, the furnace kept running into the mid 80s. I tried adjusting the temperature and when that didnt work I turned the thermostat off. When that didnt work and my screaming hot baby needed put back into bed I had my husband go and check the issue himself. Mertz sent a technician that failed to ensure he took all his equipment with him and left us in a dangerous situation with a nonstop running gas furnace.