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Reviews for Mark's Heating & Cooling, Inc.

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  • January 2026

    “I experienced a catastrophic boiler failure when it was –15°, and Mark responded almost immediately. By the very next day, a new boiler was installed. The level of service and professionalism from Mark, Ryan, and the entire staff was outstanding. The work was efficient, well-communicated, and stress-free during a very difficult situation. Mark provided tremendous value, and I wouldn’t hesitate to recommend them.

  • 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.

  • Mark's Heating & Cooling, Inc.

    355 W Wisconsin Ave, Oconomowoc

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