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!

Hello everyone, I want to give an enthusiastic 5 thumbs up for Williamson Heating & Cooling. Let…read moreme tell you why, Williamson has been my HVAC team for 17 years. As a single girl, y'all know it's hard to find good help. Wayne and his dad are AWESOME! They've installed and maintained my HVAC system with consistent excellence. I once had an outdated furnace that would go out on the coldest days, Williamson has always been there for me. They arrive on time, clean up and are all very courteous. I have replaced a heating and A/C system with Williamson and there is no other HVAC team for me. I highly recommend my HVAC team. Williamson heating is the best!

Came out on a fully booked day to fit me in when no one else could. GREAT job diagnosing the…read moreproblem and fixing it quickly at totally fair cost! Thank you Kevin for fitting me in, thank you Shawn for doing a great service call !!!!

Ken Kever is a diligent hard working honest young man who will do a great job for you We hd a heat…read moreemergency the day afte Christmas 2015, sand as luck would have it he was able to come ot and fix our plugged up condensate pump line in very short time . He didnt try to BS us and sell us parts w did'nt He is a very honest young Man I highly recommend him He ill defintely be installing our next high efffiency furnace We hve hd him here several times and he was great Ournow retired HVAC guy recommended Ken to us Rose

Always thought they were wonderful till they did a no show. I waited seven hours with a pre…read morescheduled visit loosing time at work. They do not need me as they have lots of customers now but watch them pull a no show on you next.

Had my furnace stop working on Saturday night. Called Kevin at 7:00 p.m. Weather was really bad. He…read morewas at my home in an hour. found the problem, fixed it in about an hour, had the part in his truck. Very reasonable price. Now I know who to call for my Mobile home. Would highly recommend this company and Kevin.

Csaba has come to our rescue more times than I can count. Whether it's your furnace, your…read morethermostat, or your air conditioner, he strides in with a smile on his face, quickly assesses the problem, whispers a magic incantation, and suddenly, your HVAC is as good as new. In cases where you could have solved the problem, he'll show you exactly how to fix the issue in the future. He's even diagnosed some issues by looking at photos we've texted him. His prices are FAR lower than you'll be bracing for. And while other folks will hint that you'll need to replace equipment, Csaba knows that most faulty equipment can be tweaked back to life with a new part or a minor adjustment. This man is an artist and a wizard and an absolute godsend. He'll be our HVAC guy 'til we die.

Csaba (pronounced Cha-ba) is great! I wish I'd found him sooner. He came out today for routine…read moremaintenance, but also to check on a few minor issues I was having with my furnace. He knew it well because it turns out he used to live in my building on Chicago's northside! His communication is great -- he answered immediately when I called. And we scheduled the appointment for just a few days later. He also called me the morning of the appointment to let me know he'd be "12 minutes late!" :O SO many workers are always late...I really appreciate that especially since it wasn't even majorly late. He wore a mask and removed his boots without me asking. He was friendly and personable. He listened to my issues and then showed me the simple fixes that I can do myself in the future. He basically said "let me show you this so you don't have to call me to come out in the middle of the night..." This is a guy that knows customer service and isn't at all about trying to get more money out of you. He knows the importance of word of mouth and quality work. He is great and VERY fairly priced. I highly recommend him without hesitation.

Wait until they discover their two-stage furnace was never installed correctly and that it's been…read morerunning on single stage for years. This was a serious oversight. If a two-stage furnace was wired or set up incorrectly and only ever ran in single-stage mode, the homeowner probably missed out on: Comfort benefits - two-stage furnaces are designed to run on low most of the time, giving more even heating and fewer temperature swings. Efficiency - the furnace likely used more gas and electricity than necessary. Longevity - constant high-stage operation puts more wear on components than normal two-stage cycling. It would worth having a qualified HVAC tech inspect the wiring, thermostat settings, and control board configuration.

Today I had a surprise delivery! I am the proud owner of a…read morenew furnace. His delivery was much sooner than expected, but you know how these things go. We are both doing well, but the bill was a little bit painful for my wallet. (But very fair) Full Name: Lennox ML180UHE (Leni) Weight: 127lbs Height: 33" He is warm and already quite a comfort. I know we will enjoy years of happiness with Leni. The whole experience with Illiana HVAC was easy and professionally well done. My old furnace had a great life but reached the end of its service. Illiana understood my needs and got the install done in a few hours. Adam and Vaughan were fantastic with the installation. They were very professional, respectful and talked me through the whole process. I will use Illiana for all my HVAC needs.

Called them to try to save my old furnace, they were out that day. Furnace needed to be replaced…read moredue to cracked heat exchanger in which they pulled out and showed me. They replaced my furnace and central air unit the next day in 20 degree weather. They were efficient, friendly, clean and very knowledgable!

My furnace went out during a really cold evening. They were out the next day to replace it They…read morewere just wonderful. The staff, price, service and just overall experience! It's never fun spending that much money but they really made it easier and even sent a thank you gift!

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.

The service was amazing! Customer service was very helpful and the technician provided excellent…read moreservice. And they were reasonably priced! I would definitely recommend STI Heating & Air Conditioning to anyone looking for repair and/or great service. Will definitely contact them again for future repairs and checks. :)