Experience Cool Performance


Expert Heating, Cooling, Plumbing & Electrical Service

Thumb Michigan HVAC Company

Proudly Serving Huron, Tuscola, & Sanilac Counties


Thumb Cooling & Heating was founded in 1979 by Ron Mausolf, with a main focus in refrigeration. Over the years, the company has grown steadily,

We have continued to further our product and service offerings in the Heating, Ventilation, Air Conditioning,  and Refrigeration Fields.

The Area’s Most Trusted Name Since 1979.


Heating and Air Conditioning

Hot Water Heaters

On Demand Generators


Commercial HVAC

Commercial Refrigeration

Building Automation and Control


Get a Free In-home Estimate!

    CONTACT US 24/7

    CALL 855-206-5457 TO REQUEST A QUOTE

    Our friendly technicians are available 24 hours a day for your emergency service needs.



    Hot Water Heaters

    Thermostatic Controls

    On Demand Hot Water Heaters

    Humidity Control



    Fire Places

    Air Conditioners


    We are a full service Michigan Mechanical Contractor, we are Licensed, Bonded and Insured. We service all makes and models of heating, cooling, refrigeration, and process equipment. With that being said, contact us now, to experience what our loyal customers already experience….Comfort, Quality, and Reliability.


    I am giving my high efficiency furnace/AC unit a 12 rating on a scale of 1-10! My heat bills are only $80 in the coldest winter months. It can’t get much better than that! I am a very satisfied customer.

    Audrey Pochert, St. Clair Shores MI

    We needed a heating solution for our old, unique home and decided to put in a geothermal system from Thumb Cooling and Heating. They were not only professional as businessmen but personable and meticulous. They did a great job and we would recommend them to anyone.

    Fred and Mary Ann Jahn, Port Hope MI

    Thumb Cooling and Heating is very reliable and quick to come out and service our building. They will even drive out to get the parts we need and install them the same day. We never hesitate to call them.

    Lisa Churchill with Dairy Queen, Bad Axe MI

    Thumb Cooling and Heating is not only reliable, they have great communication skills with our customers. We at Woodke Builders have been working with Thumb Cooling and Heating for 11 years and will continue to do so.

    Matt Woodke with Woodke Builders, Port Hope MI

    We are very happy with our geothermal system recently installed in the fall of 2008. It saved us money this winter in comparison to our old fuel oil system. Ron Mausolf, Les Booms and the rest of the crew were great to deal with.

    Joann Sengstock, Port Hope MI

    My wife and I like to watch building shows like ‘This Old House’. Thumb Cooling and Heating handle Geothermal units, which are true ‘Green Technology’. They are true professionals, and their crews are experts. Thumb Cooling and Heating rival anything we’ve seen on T.V. Their company is locally owned, which is good for our local economy. We recommend them to family, friends and anyone.

    Don Finkel, Port Hope MI

    Thumb Cooling and Heating has provided my family with quality products and service. It is a great relief knowing that Ron and his employees are always there for us.

    Melissa Siemen, Harbor Beach, MI


    At Thumb Cooling and Heating, we are proud of our many years as the best heating and cooling company in our area. We like to think that you would be pleased with us if you need service or a new system for your home or business because we strive hard every day to make sure each customer is satisfied. it’s important for us not only keep up on current technology but also have extensive experience providing excellent HVAC products throughout the local community. We provide HVAC services in: Bad Axe, Caseville, Port Austin, Harbor Beach, Ubly, Elkton, Kinde, Sebewaing, Port Hope, Pigeon, Owendale, Bay Port, Sandusky, Port Sanilac, Lexington, Marlette, Croswell, Carsonville, Deckerville, Peck, Forestville, Snover, Minden City, Caro, Vassar, Cass City, Mayville, Millington, Fairgrove, Unionville, Gagetown, Reese, Kingston, Akron, and Fostoria. When you need heating or cooling services in your home, we’ll be there to help out.