If you need an AC company in Crystal Lake, IL, our team at Leith Heating & Cooling is always here for you. When summer arrives in McHenry County, we have the skills, services, and products to ensure your whole-home comfort. Our family-owned and -operated company is BBB-accredited with an A+ rating.

We’re an EPA-certified company, and our team can work on all makes and models of air conditioners. Our well-established AC service technicians are highly experienced. We back all of our results with a 100% customer satisfaction guarantee.