Get matched with top thermostat installers and replacers in Des Plaines, IL

"Excellent service from start to finish. The technician handled our thermostat installation and central A/C repair quickly and professionally. Everything is working perfectly now and the whole process was explained clearly. Very reliable team and highly recommended."

At One Hour Heating & Air Conditioning, we've been proudly serving Chicago-area communities with expert heating and cooling services for over 65 years.\n\nOur reputation is built on delivering legendary service—with every technician fully background-checked, drug-tested, and bringing at least five years of professional HVAC experience to your home.\n\nYou, the customer, are the most important part of our business, and we never forget that.\n\nBe sure to ask about our flexible financing options—we're here to keep comfort within reach.

"I spoke with Val on the phone, my refrigerator was leaking water. He said he would be able come by between 12-3pm. When he was on his way, he texted me with his ETA. Arrived promptly, and diagnosed the problem quickly. Replaced the connector on the water line, tested it, working properly, all set! I was very grateful that he was able to come out so quickly and fixed the problem. Very nice serviceman. I highly recommend him!"

"Collin did a great job of installing the whole house humidifier for my heat pump furnace. Very happy with both units. "

"I recently had Hot Cold Air Company repair my furnace, and I am thoroughly impressed. Their technician arrived promptly, diagnosed the issue quickly, and explained everything clearly. The repair was done efficiently, and my furnace is now working perfectly. I highly recommend Hot Cold Air Company for their exceptional service and professionalism."

"Knowledgeable about ecobee and nest thermostats"

"They were great to work with. They communicated what time they would be there, arrived on time, hauled away the old ductwork that they replaced. I would definitely recommend them."

"Robert was great. I needed help installing my 75" tv. I left a message over the weekend. He called me in the morning on Monday, and TV was installed that same afternoon. He was able to provide the mount and at a fair price. All in all, very glad to find his service and expertise. After the mounting we chatted about other upgrades I wanted to do and he gave me some helpful advice on what to think about. I would definitely recommend his services."

"Mr Aga or Elvis personally oversaw my project. He is professional,. He answered and explained every question throughly. He got me the best price for the project. He installed the blower and everything is working properly. He is a asset to his industry. Kind and considerate. I highly recommend this company. You wonâ t regret it â ¤ï¸"

"Diego came out and replaced my thermostat, really easy to work with. "