Great Lakes Heating & Cooling, LLC

Great Lakes Heating & Cooling, LLC operates in Oconomowoc, Wisconsin, delivering heating and cooling solutions to residential clients throughout the area. With a perfect 5.0-star rating across six customer reviews, the company has established itself as a trusted local option for homeowners seeking reliable HVAC service. The business was founded in 2008 and remains under the ownership of Doug Lee, who started the company as a small residential operation and has expanded its reach over the years.

This contractor distinguishes itself through flexible availability and responsive service, maintaining 24-hour operations six days per week to accommodate customer emergencies. Several reviewers specifically mention same-day or after-hours response times, including situations where service was provided within an hour of the initial call. The company handles repairs across various systems, with customer reviews documenting work on older equipment including units approaching two decades in age.

Customer experiences highlight specific scenarios demonstrating the company's approach to service. One reviewer describes a Friday night call at 8pm where Doug walked them through temporary furnace operation before a full repair the following week. Another details an emergency call during extreme heat where the technician arrived by 10am the next morning, diagnosing an insect intrusion in the contactor unit. A third reviewer mentions same-hour response to a thermostat warning and furnace water leak, with service continuing past 6pm to fully resolve the issue.