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Koesterer Heating and Cooling Inc
About the business:
In Granite City, we are Koesterer Heating and Cooling Inc - your dedicated HVAC specialists. We pride ourselves on delivering exceptional heating and air conditioning services to local homeowners like you. As a full-service HVAC contractor, we specialize in installations, repairs, and maintenance of your comfort systems. Our expertise extends beyond traditional HVAC solutions, making us a metal fabricator you can trust for custom projects.
At Koesterer Heating and Cooling Inc, we're committed to ensuring your home stays comfortable all year round. With an impressive 4.9/5 customer rating based on 106 reviews, our reputation in the industry speaks volumes about our dedication to quality and customer satisfaction. Whether you need a new heating system or metal fabrication work for a unique project, look no further than Koesterer Heating and Cooling Inc - your reliable HVAC partner in Granite City.
Services:
All services 4-
Air Conditioning Contractor
Book from $50In Granite City, we're Koesterer Heating and Cooling Inc, your reliable Air Conditioning Contractor. We deliver seamless cooling solutions that …
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Heating Contractor
Book from $50In Granite City, we're Koesterer Heating and Cooling Inc – your reliable partner for exceptional heating solutions. When your home …
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Hvac Contractor
Book from $50In Granite City, we're your go-to HVAC Contractor. Our expertise lies in providing efficient heating and cooling solutions for homes. …
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Metal Fabricator
Book from $50In a homeowner's moment of need for metal fabrication, look no further than us at Koesterer Heating and Cooling Inc …
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Hours of operation
- Mon – Fri
- Sat – Sun
- 7:30 AM – 4:00 PM
- Closed
Latest reviews
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Jeff Mitchell8 June 2026
Recently needed ac service on our old and heavily used unit. Koesterer responded quickly to online request and came out the next day. The technician was professional and friendly. He did just what he needed to do and did try to "upsell ", which was very nice. Overall a great experience. AC is working fine now and the cost was reasonable. I definitely recommend Koesterer for any hearing/cooling needs.
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Kathy Mitchell8 June 2026
Returned call after hours and set up appointment for the next morning! Hot 103* temperature caused our AC to fail. The job was completed and we have a working unit.
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Ju Lisa Newton8 June 2026
I had a issue with my system and got an appointment the very next morning. Ryan showed up for the job as scheduled. He was most professional, courteous and efficient. I don’t know much about HVAC systems but he explained how everything worked and gave tips on maintenance. I will definitely request service again this fall.
