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!

Reply to 2 reactions from Harmonic on my 1 star review…read more 1. A. & K. claimed A. fixed my heater Tuesday; lie. Bad customer service. Harmonic deserves 1 star, but all the starts below 5 are NOT indicated on the Google graphic of the numbers of review stars 1-4: false. 2. I never promised a review pull-down for a discount. My husband & I have better things to do than having an "agenda" as Harmonic accused. My husband was on a business trip. 3. I never called for an emergency repair. I did not switch from repair to cleaning & maintenance. I asked A. if C & M was possible afterward, unaware of 2 more with no heat. Harmonic called me "selfish" for this. 4. Any possibility A. and K. have unconscious biases towards people like me? They accused us of "manipulating" what? To save a few hundred bucks, while we spent in the tens of thousands at Harmonic's better former (aquired) company) you imagined up? 5. How could Harmonic accuse me of lying about my pain. Because I was able to and had to carry my 10 lb dog for a short moment because of her barkin? Why do I even have to explain my chronic severe back pain and mostly failed back surgeries and weak immune system? 6. I had no "agenda," but getting my heate fixed. I am not playing any "game" as accused. I am standing up for myself. 7. K.'s statistics on the number of my Goole reviews are false. 8. A. & K. are the ones who were "aggressive, harsh, unethical, disrespectful, and manipulative." Stop projecting and gaslighting. I wish I would remember to record conversations when I am alone with a person like A. Why did K pull down his absurd replies on Google?

When I called to make appointment representative told me I was out of work area. I told her on…read moretheir website I was in their area. She said I was incorrect but would check with owner and would call me back. Never called me back! Plus from the response from Paul at the company is totally out of line. If Paul checked his website, he would see that Carol Stream is in his service area. I'm so glad I decided not to do business with your company. You seem like a rude ignorant little man am I complaint is completely valid again. Check your website. I'm in your service area!

Came out quickly, gave a variety of options, repaired within hours. Max was very good.read more

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.

Pillar Heating and Air will provide the help you need with your furnace, air conditioner, or…read morethermostat. Travis and Adam are knowledgeable, professional, honest, and prompt. Service is done with care. They have taken care of our HVAC needs for years. We believe they are the best in the business. Give them a call!

Had to get new furnance Salesman was friendly and very…read moreresponsive Guy came to install no issues New furnace works great

The technician was suppose to come between 8 - 830. I called around 9 am I was told there was an…read moreemergency. Fine My concern Is with your customer service. No one called me This makes me angry. I used to work in customer service. This would be something to the customer. If I did this I would be in serious trouble. Because you don't treat your customers like you did. You always let your customers if there is a delay. You guys failed this If you guys keep doing this. You guys will go elsewhere for service

The HOF HVAC team was so responsive when I needed a water heater replaced…read more They delivered a replacement water heater and drain pan within 2 hours and had it installed by mid-afternoon. Very professional team! I would recommend them to anyone needing plumbing or HVAC work done!

Our AC was struggling during the July 2025 heat wave. Daniel was incredibly prompt, helpful, and…read moretransparent. He even waited while I finished a work meeting so he could thoroughly explain the issue, the fix he was going to do, and discuss the cost. I really appreciated his honesty! The fix ended up being ~$200 less than the original estimate. Highly recommend

Had a new whole house humidifier installed. I called them and had it installed a couple of days…read morelater. Excellent service, friendly staff.

Courteous and efficient and professional! Very happy with…read moretheir service today and the installation of our new heat pump last year.

Summers sent Jason and helper out to hook up the natural gas line to our new pool heater. Jason did…read morean excellent job, making sure that all codes were followed and the installation was leak-free. He even came back out after we had the electric install finished to make sure that the installation was complete and safe, at no additional charge.

We were lied to, they said $1500 to $2500 to fix for out A/C unit... we called a friend to see if…read morethey were telling the truth- No they lied... it was only $125 for the parts and $275 labor....Plus we had to pay Summers $136 to replace 1 wire... a whole role costs $8...and then they were supposed to give us a proposal and Thank Goodness we never got one. My husband called today and canceled the monthly $12 fee for them coming out because we will never use them again and feel we were also lied to on our furnace- because we are Senior Citizens they took advantage of us... why were we paying a fee when they charged us anyway...

As a fellow small business owner, I feel obligated to warn others about our experience with this…read moreHVAC/R contractor. Over more than a decade of managing vendors, this has been hands down the most disappointing and unreliable company we've dealt with. We initially entrusted them with all our heating, cooling, and refrigeration needs. Unfortunately, what followed was poor communication, subpar service, and a complete lack of accountability. When issues came up--which happened frequently--they were more interested in deflecting blame than fixing the problems. Over a year, they raised our service rates by 25% without any notice or explanation, and when I reached out to ask about it, they never responded. I also requested several quotes that were never provided. As a busy business owner, I shouldn't have to chase down contractors just to give them our business. Even worse, they billed us for services that were clearly not performed. I verified this myself--twice--and one time had to bring in a third-party HVAC tech to confirm (with photo evidence) that a rooftop unit hadn't been serviced as claimed. Despite being presented with clear proof, they refused to acknowledge or resolve the issue. After nearly two months of delays and rescheduling for a correction that never happened, we finally hired another company to finish the job. Their refrigeration work was even more troubling. They miscalculated and mis-sized a walk-in freezer, resulting in a system we had to completely replace. They relied on bad measurements and passed critical sizing calculations to a supplier instead of doing it themselves. Even when I showed them accurate specs from the equipment manufacturer, they pushed back with excuses instead of taking responsibility. To make matters worse, they submitted a bid to replace our walk-in cooler and freezer with dimensions that were entirely off. Had we accepted the quote, the units would've physically not fit the space--basic measurement errors that would have led to a major installation failure. The most aggravating part of all this has been their tone: dismissive, defensive, and utterly lacking in professionalism. If you're considering this company, I urge you to think twice. When things go wrong--and they very well might--you'll be on your own. You deserve a vendor who respects your time, your business, and takes pride in getting it right.

If you want people who will show up at the wrong time. Then they come and fraudulently charge for 2…read morehours of work AND APPRENTICE FEE FOR NOT FINDING A LEAK THESE ARE YOUR GUYS!!! 550.00 FOR NOT finding leak. Look elsewhere