During a recent 90 plus degree heatwave, our AC went out and we were in need of assistance. We…read morecalled Herchenbach and their response was immediate. Brian D. was our technician, and he was professional, knowledgeable, and very kind. We were very pleased with the service and will not hesitate to use Herchenbach for future HVAC needs.

Highly recommend Herchenbach Mechanical for your HVAC needs in Lake County. They are family owned…read moreand operated. A few years ago, my old AC from the 1990s was in need to be replaced. I decided to go with Herchenbach Mechanical after comparing a couple other places in the area. Scheduling an appointment was easy. Curtis and his team came over and installed the AC unit fairly quickly. They were very professional and courteous. Fast forward to a few days ago, my kid decided to throw pieces of chalk down the pipes. I called Herchenbach Mechanical to schedule a time and date that works for me. They will email and text you to confirm your appointment. On the day of your appointment, they will also send you a photo of the technician that will be over. Adam, the technician, was very friendly, knowledgeable, respectful and on time. I told him what happened and he explained what he would need to do to get the chalk out from the pipes. I also scheduled them to clean my AC as well. After Adam finished using the hose from the backyard, everything was neatly put back the way it was. He didn't leave anything out or left a mess. When he was inside the house, he would immediately put on those disposable shoe covers without me having to ask. Herchenbach Mechanical has always provided great, friendly service when I needed them. I have nothing but good things to say about Curtis and his team. Again, highly recommend them! You won't be disappointed.

Yesterday, 7/2/2026 I called Keith at Premier Heating & Cooling because my ac wasn't working…read more later that afternoon/evening, James came out and fixed my issue. Premier H/C are the best at what they do!! Reasonably priced too! Great local family business!!!

After settling into our home for a year, I realized we still didn't have an HVAC company. I got…read moreahold of Premier through Yelp and they couldn't have been more prompt. They were out to the house in 24 hours for just a routine service. They were super courteous and thorough, plus they made suggestions for better care of our systems that didn't cost a dime. We're looking forward to a great ongoing relationship with the company.

Great company, they have now replaced my furnace and AC unit. The company is quick and all…read moreemployees are very nice.

Prompt response and arrival , fixed issue by replacing capacitor. Local business, Highly recommendedread more

Allied installed our HVAC system in 12/2021. We had it served in 2024 by a BG company who claimed…read morewe needed 2K of repairs due to a leaky AC. Juan of Allied Libertyville came out last week and verified that the AC was functioning properly - no repairs needed. Juan was very professional and knowledgeable as he did not mind answering all my questions and showing the test results. I would recommend Allied and Juan to service your HVAC system for peace of mind.

Applied Air did not do my job well they installed two different systems made by different companies…read moreone by Goodman other one by Lennox they do not work together since day 1 I'm having issues I reached out to them. They came back and fix the issue with Linux system as well without my consent, they change my smart thermostat to the manul thermostat and promise me to come back and reinstall the smart thermostat but never came back. I reached out to them multiple times and they refused to come back.

Fast, communicative, thorough, and honest, all for a great value. Angel arrived as scheduled,…read morediagnosed the exact problem, gave the timeline for repair, and everything was done as promised. Part was replaced and heat was back on in no time. Trust the Yelp certification, Cook's will be our go-to for our HVAC needs.

Right before our last heat wave our AC went out. The owner came out that light to take a look and…read morequote us. The next day the tram came out to install a new AC and we haven't had any issues since. Don and Brian were both very knowledgeable, friendly, professional, and quick. The quality of work is worth the money; great value.

Called and set up a repair and cleaning. A couple days later they came out and did the cleaning and…read moretook some photos and said they will send a estimate. After 10 later I called and she said the tech had not talked to anybody in the office to set it up. After 3 weeks I called and got blown off by the office girl. I would net use them.

Came out the same day we called. Prompt, efficient, and very professional service. We would use…read moreagain.

Ken was fantastic and we were told by a competitor that we would need to replace our Carrier A/C…read morebecause it was over X number of years old... We were also told that in order to refill the coolant it could potentially leak and cause additional problems. To make a long story short, Ken made quick work of everything and was able to add the coolant that was extremely low and only charged us a nominal fee for the coolant. He was extremely kind and very professional. I will always use Ken Thomas with KET Kevin and Deb-Gurnee, IL.

I called KET Home Services this week after my furnace went out. I was a first time customer but…read morefound them on Nextdoor with raving reviews so I wanted to give them a try. I wasn't looking for a large HVAC company as I know those places tend to charge more and I also wanted to give a small business in the area the opportunity. I called in the middle of the afternoon and explained my situation, and within 1 hour Ken was at my house. His daughter was the call taker and she was very polite and professional and passed along to Ken that she felt my situation was urgent, which I appreciated. Ken assessed my situation and determined my furnace (20+ years old and on borrowed time) needed to be replaced and was dangerous to continue to use. He was nothing but nice and professional the entire time but stressed the issue of replacing sooner than later. He recommended I not use the furnace. After being at my home for approximately 1 hour, he was very kind and didn't charge me for the service call but instead deemed the visit a "quote". Now that is something you would never get from a "Big Box" company. The next day he emailed me a quote for a new HVAC system as my A/C was on borrowed time as well. He said he could even do the install with in 5 days (WOW). His quote was very fair and reasonable, however I didn't use his company but this was no fault of his. I would HIGHLY recommend him as others have as well.

We have used Lake County Mechanical for a few services. They replaced my condesant pump as well as…read moreinstalled a new Central AC unit. The cost was fair for the new unit All of the technicians who have come out are great, such as Miguel and Harley. Melissa at the office is always very helpful. I will be using this company for my heating and cooling needs in the future.

Their service is excellent , They don't have a service charge ! We had our furnace cleaned today…read more Miguel came out today! He's friendly and explains everything . He does the testing to make sure They have a program that covers the air conditioning cleaning . This is highly