Thielmann Heating, Cooling & Plumbing
About Thielmann Heating, Cooling & Plumbing
Thielmann Heating, Cooling & Plumbing serves New Berlin and communities across southeastern Wisconsin with heating, air conditioning, indoor air quality, and plumbing work. The company has operated since 1929 and provides furnace repair, furnace installation and replacement, heating repair, heat pump service, and support for gas and oil furnaces. Its technicians are NATE-certified, and the business is licensed and insured. Homeowners can request same-day service, emergency service, free estimates on replacement quotes, and financing options. The company services all brands and offers maintenance plans for ongoing system care.
At a glance
- Trades
- HVAC, Plumbing
- In business
- 97 years (since 1929)
- Service area
- New Berlin, Southeastern Wisconsin, Milwaukee, Kenosha
- Address
- 17020 W National Ave, New Berlin, WI 53151
- Highlights
- Financing availableEmergency service
Services
- Heating repair
- Furnace repair
- Furnace installation
- Furnace replacement
- Heat pump service
- Gas furnace service
- Oil furnace service
- Air conditioning
- Indoor air quality
- Plumbing
- Maintenance plans
How the 89 score breaks down
Scores are calculated the same way for every company. See the method.
What customers say
John was very professional and knowledgeable about his work. He took his time and cleaned up after himself. I would definitely use Thielmann again.
Google review, Oct 31, 2026
Kevin was knowledgible about servicing my A/C unit. He explained what he was doing and why. Half way through the service it started raining. Instead of leaving he did some paperwork till it stopped and he finished the job. He even pulled the fan assembly out and using my hose cleaned the leaves and other debree out…
Google review, Oct 30, 2026
Read all 2,033 reviews on GoogleJacob was great. He was efficient and fit right into my work from home schedule.
Google review, Oct 29, 2026
Rating distribution and reviews from the company's public Google listing.
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