Sep 2026
Definitely pleased with this company! Had an issue with my ac unit and they were able to come out the same day and get the issue fixed! I will definitely be calling them for all of my hvac needs from now on!
Koesterer Heating And Cooling Inc provides professional and personable service. Their technicians arrive on time, explain their work, and answer questions. They are fast, helpful, and reasonable, offering efficient solutions without breaking the bank. This family-owned business with years of experience prioritizes customer care, making them a highly recommended choice.
Definitely pleased with this company! Had an issue with my ac unit and they were able to come out the same day and get the issue fixed! I will definitely be calling them for all of my hvac needs from now on!
I want to thank Tina Hall for referring me to this company I called they were out by the afternoon checked out my AC unit my motor was going out and there was another item I don't know what the name of it was he replaced them both he explained everything he was doing he was a very friendly individual and very honest individual I would refer him to any of my family or friends and work college thank you for your service I would rate him a 10 out of 10 thank you for helping my family with my AC unit
When our upstairs AC unit stopped working, Koesterer came out, diagnosed the issue, and let us know the compressor was failing and the unit had simply reached the end of its life. They walked us through exactly why replacement made sense and laid out our options clearly. We've decided to move forward with them for the new unit. This isn't our first time working with Koesterer — they've handled our annual maintenance and any repairs on our older units for years now. We trust them completely, and their team is a pleasure to work with every time. Can't recommend them enough!

3371 IL-162, Granite City, IL 62040
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