O & W Heating and Cooling and Furnace, boiler, water heater install & repair

O & W Heating and Cooling has served Milwaukee homeowners for over two decades, specializing in furnace, boiler, and water heater installation and repair. The company holds a 4.8-star rating from 216 reviews, reflecting consistent quality service across the city's residential neighborhoods. Operating seven days a week from 6 AM to 9 PM (with Sunday hours extending to 9:30 PM), the contractor provides flexible scheduling for busy homeowners. Technicians are licensed and trained to handle the full spectrum of heating equipment common to Wisconsin homes, from aging furnaces to modern high-efficiency boilers.

What distinguishes O & W Heating and Cooling is the personalized attention technicians provide during each service call. Multiple reviewers specifically mention that Omer (the lead technician) explains every step of the repair or installation process, demonstrating how the equipment works and sharing maintenance recommendations. This transparent approach helps homeowners understand their systems and make informed decisions about repairs versus replacement. The company focuses on straightforward diagnostics and honest assessments rather than pushing unnecessary upgrades.

Reviewers consistently praise technician Omer by name for his professionalism and skill. Susan Forsberg called Omer "knowledgeable, professional, and personable" after he installed her water heater, noting she doesn't typically leave reviews but was compelled to share her experience. Steve Fleischman described how Omer explained the entire water heater installation process and taught him proper maintenance. During an extreme Wisconsin cold snap in January 2025, with temperatures dropping to minus-10 with wind chill, Diane Kl's furnace malfunctioned for four days before calling O & W, Omer resolved the ignition problem that other attempts could not fix, restoring heat to a house that had dropped to 61 degrees.