About Mark's Heating & Cooling, Inc.

Mark's Heating & Cooling, Inc. is a highly recommended HVAC service provider in Oconomowoc and the surrounding Lake Country area. With over 40 years of experience and NATE Certification, the company specializes in Bryant Heating and Cooling Systems. They offer a complete range of services, including installation, maintenance, and repairs for heating and cooling systems. Customers appreciate the prompt service, often receiving assistance within hours of calling. The team is known for their friendly and professional approach, providing quick solutions at reasonable rates. Mark's Heating & Cooling has gained loyal customers who trust them for annual maintenance and emergency repairs alike.

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Reviews for Mark's Heating & Cooling, Inc.

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  • Jan 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.

  • Aug 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.

  • Jul 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.

Hours

Monday: 7AM - 7PM
Tuesday: 7AM - 7PM
Wednesday: 7AM - 7PM
Thursday: 7AM - 7PM
Friday: 7AM - 7PM
Saturday: ClosedSunday: Closed

Tips

accepts credit cards

Location

355 W Wisconsin Ave, Oconomowoc

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