Get matched with top thermostat installers and replacers in Carol Stream, IL

"Richard Savage responded timely. He did a wonderful job installing our our Air Conditioner and Furnace. He was prompt and efficient. He is very customer service oriented and he is very knowledgeable. I would highly recommend his services. Great guy!"

"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.

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

"Excellent service! They diagnosed the issue with my GE oven (faulty igniter glowbar) over the phone and came out early the next day to replace it. The technician was prompt (he also sent me a text when he was on his way, which I appreciated), and he replaced the part in less than an hour. He stuck around to make sure the oven was working again, and he even helped to vacuum behind the oven before he pushed it back against the wall. The technician went above-and-beyond, and the cost was reasonable. I highly recommend MVFix!"

Rest Assured HVAC is open Monday - Friday 8am-5pm (regardless of hours listed on Angi/HomeAdvisor). \n \nWe are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business. 24/7 Emergency Service available. \n \nRest Assured HVAC\nElgin, IL 60124\n(847) 224-2420\nhttps://RestAssuredHVAC.com

"We just had Corey install our new Ecobee4 thermostat. He is quite possibly the nicest and most professional technician we have ever had in our home. He was meticulous and courteous. We will definitely call this company again, if we ever have any heating or cooling issues. 5 stars!!!"

"The service tech(Chris) was very courteous and knowledgeable. I told him before he came that the fan was running intermittently. He said he would be out in the morning with the motor in case that was the problem. Turns out the fan was fine and it was a solenoid that was bad. He could have replaced the fan and the solenoid and made more money for himself and the company. He just replaced the bad solenoid. He fixed my AC in less than half a day during a heat wave and saved me money! If anybody asked if I know good and honest HVAC place I will recommend "Generations"."

"Kevin and Brad did an amazing job! They replaced the subfloor that had been damaged by a leak from my toilet, installed new flooring, and put in a new toilet, making the bathroom look brand new. They showed up on time, stayed until the job was completely finished, and made sure everything was cleaned up before they left. Super friendly, professional, and hardworking. I highly recommend them!"

"Roman did a great job installing our new AC system. The installation was clean, professional, and everything was done with attention to detail. He made sure the system was running properly before leaving and left the work area spotless. Our house is cooling perfectly now. Very happy with the service and would definitely recommend Primeline Heating & Cooling."