Koesterer Heating And Cooling | Reliable HVAC Services in Granite City, IL

A frozen HVAC system or loss of cooling is a common issue in our Granite City climate, often due to refrigerant leaks, dirty coils, or airflow problems. First, turn the system off to let the ice melt. Our technicians can diagnose the root cause, whether it's a failing compressor or another component, and provide a lasting repair. With over 40 years of local experience, we've seen and fixed these seasonal problems countless times.

Yes, we specialize in full HVAC system installation and replacement. As an authorized American Standard and ClimateMaster dealer, we help you select the right high-efficiency system for your Granite City home or business. Our process includes professional installation, custom ductwork fabrication from our sheet metal shop if needed, and backing the work with a 10-year manufacturer's warranty on parts and our labor guarantee.

Regular maintenance is key to preventing breakdowns, improving efficiency, and extending the life of your system, especially with our local temperature swings. Our maintenance service includes cleaning, inspection, and tuning of all components. This proactive care can help avoid common failures, lower your energy bills, and ensure your system is ready for both Granite City summers and winters.