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Reviews for Mark's Heating & Cooling, Inc.

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  • August 2025

    Our boiler was not working properly and much of our house was not being heated. Mark came out and diagnosed the problem quickly and was able to replace the faulty part, all at a reasonable price. I highly recommend him and his crew.

  • July 2023

    Wonderful company...Mark just gained 2 new customers . I have already recommended this company to friends. When winter approaches I will definitely have Mark come over for my annual furnace check.

  • July 2023

    I called Mark after getting his info from the Heil distributor website when our new build home HVAC installer refused to help me on the weekend. Mark was there with a smile within the hour and had our AC running and the part swapped out within just a few minutes. If you’re in need of HVAC help or a new build look local and not with the big companies. Lesson learned!!! Very reasonable rate. Highly recommend.

  • Mark's Heating & Cooling, Inc.

    355 W Wisconsin Ave, Oconomowoc

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