I've used Carlson Heating & Cooling twice and have been very satisfied both times. In 2024, I had…read morethem inspect my furnace and AC. They arrived on time, were professional, and gave my system a clean bill of health--without recommending any unnecessary repairs. Last week, when my AC stopped working, they quickly diagnosed a dead compressor and recommended a replacement. Impressively, they waived the $225 charge for the initial visit and parts. The replacement was completed on schedule, exactly within the estimated cost. The technicians were friendly, informative, and professional throughout the process. They also cleaned up thoroughly, leaving no mess behind. I trust Carlson Heating & Cooling completely and will continue to use them for future service. I highly recommend them to anyone needing a system check-up, repair, or replacement.

Mike was just awesome!! I will be calling him again for my cleaning in the spring. His prices are…read morefair. He came over to fix a problem with my furnace. We thought we had fixed it. I needed to call him back and he came back to fix it after his day was over. A part needed to be replaced. He used the service charge towards the price of the part. His work is really quality. Very conscientious. Will be calling him again!!

A huge thank you to Tod for not only helping my elderly in-laws, but for proactively calling me…read moreafterwards to make sure I was aware of future maintenance needs after diagnosing some issues with the air conditioning in their home. Their system did not have a filter installed and after taking care of the a/c he went the extra mile to go to the store and buy two filters on his own dime. He came back, installed one and left the other for a future change out. Great service from a businessman that cares for the people he does work for. Much appreciated.

Tod and crew will take care of all your needs. He has installed a new A/C unit and serviced our…read morefurnace. Fair, honest, and won't sell you what you don't need. Give them a try and I guarantee Comfort Zone will be your go to for HVAC needs!

In 2019 Chris Hull pulled off a miracle by repairing my central A/C that 3 other local companies…read moreinspected & told me I had to replace unit!! Saved me $5-10K at that time. Have recommended him to other ls who've all been pleased with his ability to get their repairs done quickly & more importantly done RIGHT. I've had a furnace that has needed repairs multiple times since 2007. It finally took it's last breath recently although Chris tried to his best to get it going. Chris helped me decide which new furnace to get ordered after I asked him which furnace would he get. He explained the choices & a decision was made. The furnace arrived in 2 days & was installed in an afternoon. Furnace works perfectly!! For a reasonable price too I might add!! You don't need ro look any further for a great HVAC contractor. His work ethic is rare. Thank you so much for all the help!

I recommend their services 100% Honest, Reliable Service,…read moreGreat Price Guarantee, and the job gets done fast and correctly the first time! Ive had several emergencies and they've been at my doorstep Very Fast! Explains things very well to avoid future problems. overall 10/10 service! Had my AC fixed years ago. then it was time to replace and they did an AMAZING job! I've also used their duct cleaning service and I totally recommend it! Thano You So Much Chris! we appreciate your service

I highly recommend this buisness. I had a furnace, central air and humidifier put in. It was done…read morewhen he said it would be, showed up when promised and very good price. He was very professional and would actually listen to your needs and deliver. Quality Units at affordable prices.

From the owner: Residential HVAC services custom built duct work…read moregas pipe installation Whole house humidifier installation Thermostat installation

We have used Davis Complete Heating & Cooling this past month for both A.C. and Furnace. We had…read morefree-on added to central air and had our furnace check for the winter done. Both were done with complete explanation given to us. Very prompt and professional. Prices very reasonable.

From the owner: Davis' Complete Heating & Cooling has been serving Northwestern Illinois since 1984. We offer a 24…read morehour emergency service 365 days a year if needed. We are a full service Heating and Air Conditioning Contractor Installation of new units and we service all brands.

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?

Used them in an attempt to repair a furnace on day and they responded within an hour or two…read more Eventually replaced the furnace and very happy with the experiences. Highly responsive, accomodating and really competitively priced. Highly recommended.

Left a message at night about AC not working. Josh messaged me first thing the next morning saying…read morehe could come out right away since we have a 1 year old at home. Was here by 7:30 and got the job done in about an hour.

They came the same day. He knew what to do right away. Thank you! I would recommend them.read more

Have used in the past, but this time, extremely difficult to get in touch with, and they didn't…read morereturn my message. There phone goes to "line busy" before 4pm. Thought I had an appointment, and asked them to confirm. No answer. They didn't show up. Don't waste your time.