Trust Thiele

Who We Are

Family owned and operated since 1983

Thiele Heating & Air Conditioning is a BBB accredited business that was established in 1983 by Roger and Peggy Thiele. For over 30 years, we have provided heating, air conditioning, and refrigeration services to residential homes and local businesses throughout Southern Wisconsin and Northern Illinois. 

Our highly trained technicians have substantial HVAC experience and provide quality workmanship for a variety of heating and cooling equipment brands. 

  • 30+ years of quality service and experience.
  • Skilled team of technicians with superior workmanship. 
  • Cost efficient heating and cooling solutions of top brands.
  • Excellent customer service.

Service You Can Trust


Annual preventative maintenance and service checks.


Energy efficient brands of furnaces, boilers, and heat pumps.


Wide selection of air conditioning, refrigerator, and ice machine brands.


I had these guys out to look at my A/C unit last summer, the service was great, tech came on time was very friendly & got my problem fixed quickly. The tech cleaned up the mess that was made from the work that he did. He answered all my questions & gave me a few tips on how to get the best performance from my older equipment. I plan to use them again if a problem comes up.

Had to have my furnace replaced the day before closing! These guys did a fabulous job all the way around — timing, honesty, not ripping me off (you can tell) and top notch mastery.

Virginia Seno – Google User

After Ryan heating came out for our AC not working right and yelling at me along with terrible customer service skills, not doing a thing for the AC, Thiele came out, checked the freon level after I told him what was happening. System was low on freon. Added new freon and now all is good. Very professional and had great customer service skills. Will be calling Thiele for all out heating and cooling needs.

Earthdog Jim – Google User

I don’t normally leave reviews, but I was very happy with the work they did. I have an unusual furnace, and they did a great job, and didn’t overcharge me. Its late in the year so I needed it fixed fast, they came out within 24 hrs, and fixed it in under an hour. They explained the problem and then took notes on everything for future use. I will definitely be using them for future issues. Even gave me some tips on upkeep.

Our team


Roger & Peggy Thiele



Scott Thiele



Erin Loomis

Business Manager


Kal Kovacs

Operations Manager


Josh Dietschweiler

Service Assistant


Chris Walworth



Dan Holterman

Service Technician


Mat Thiele

Service Technician


Warehouse Dog