Get matched with top air conditioning pros in Markham, IL

"Great. I was out of state and my house and dog sitter called. My house temp, was 85! Look up Angie’s list. Called the business and explained the problem. They got the repair man out the next day...on a sun day!! My air was fixed by the repair man that day. My sitter said he was very nice .....price was great,,, I would have them again. This is the 2nd time I use Angie’s list."

"The air conditioner is working fine."

"We had a great experience with Four Seasons Heating & Air Conditioning during our recent replacement of our furnace and AC unit. They were very professional and completed the job on time and answered all of my questions. Would recommend them for our Heating, Air Conditioning, Plumbing and Electrical needs."

Precision Today is a trusted multi-trade contractor with a expert technicians specializing in HVAC services for residential properties. We deliver fast, safe, and reliable solutions—backed by same-day service.\n\nOur HVAC services include heating and cooling system installation, furnace and AC repair, seasonal maintenance, ductwork services, thermostat upgrades, and energy-efficient system replacements. Whether you need a quick repair or a full system upgrade, our technicians work with precision and attention to detail to keep your home or business comfortable year-round.\n\nWith locations in Carol Stream, West Chicago, Grayslake, Palatine, Franklin Park, and Naperville, we provide efficient coverage across the surrounding Chicago suburbs—allowing us to respond quickly and keep your project moving.\n\nIf you’re looking for a responsive, professional contractor who prioritizes safety, speed, and quality, Precision Today is ready to help—often the same day you call.

"The man that came out was prompt . He fixed the problem for a fair price.i had a guy come out before him and he told me I needed a new system. It didnâ t make sense because my air system was just installed in 2018. I appreciate his accuracy identifying the problem. I have already reffered him to others"

"Angel and Tyler worked their butts off to help us with our air conditioning. They unfortunately had to do way more work than expected, however they were at our house late and always stayed in communication on what was going on. They did a great job and were very detailed and thorough with all testing making sure that the job was done right and there were no issues. We had a great experience!"

"My service tech Marvin got my air back working when it went out on those very hot days and for a really good price!!"

"I needed the refrigerant in my HVAC system refilled and Juliano and Richard were quick to respond and very professional. They inspected the system and completed the job in one day. Very satisfied with work performed."

"We had a full AC unit and furnace installed by Frostcore and the experience was outstanding from start to finish. The team was professional, punctual, knowledgeable, and took the time to explain everything clearly. The installation was clean, organized, and completed with great attention to detail. Our new system is running perfectly, keeping the house comfortable and efficient. You can tell they truly care about quality workmanship and customer satisfaction. I highly recommend Frostcore to anyone looking for honest, reliable, and professional HVAC service. Thank you again for the excellent work!"

Integrated Systems Technology has over 30 years experience in electrical mechanical services. We believe in continuing our education, so we are abreast with the technologies of today. We take pride in our work and are very detail oriented. We aim to please and get to the root of the problem the first time out. Customer satisfaction is the most important work we can offer for you. We do charge a service charge but if you have us complete the work we will credit that back to you! Please contact us today, we are excited to earn your business.