Thielmann Heating & Cooling has been providing trusted HVAC services across Southeastern Wisconsin since 1929. They specialize in heating, cooling, and indoor air quality systems for residential and commercial properties, offering installation, repair, and maintenance with a focus on reliability and customer satisfaction.
Technicians are consistently praised for their friendliness, professionalism, and thoroughness in addressing customer needs.
Timeliness
Most reviews highlight prompt service, with technicians arriving on time and completing jobs efficiently.
Communication
Customers appreciate clear communication regarding service options, pricing, and follow-up, enhancing their overall experience.
Technical Expertise
Technicians demonstrate strong knowledge and skills, effectively diagnosing issues and providing valuable advice.
Overall Satisfaction
Many customers express high satisfaction with their experiences, often recommending the company for future services.
RK
Ryan K
2 days ago
5.0
I had a great experience with Thielman Group Heating and Cooling. I called with an issue late Tuesday afternoon and they had an expert (Todd H) arrive 8:30 am the next day. Todd was friendly and professional, also walked me through my issues and options and set me up with a sales rep visit (Michael) a few hours later. Michael verified my issue and presented me with a quote, he was was also friendly and professional and provided me two new space heaters to use until my issue was fixed. He got me set up with an installation of a new hvac system the next day at 8:30. Jim K and his team was friendly and professional and got my hvac installed within 3-4 hours. Jim was able to answer the questions I had.
Overall, i was very statisifed by the friendliness of all the Thielman professionals i worked with during the process, but also how quickly they got through the process, especially in a busy time of year.
JP
Julia P
2 days ago
5.0
Nick H did a great job repairing my furnace after it stopped working in the middle of the night, when the temperature was 15°! The emergency service line worked great, he let me know when he was on his way, and arrived promptly. He fixed the problem and additionally changed my filter. I have used Thielmann for all of my heating and cooling needs for years. Always work with someone you can trust.
CC
Catherine Cadogan
5 days ago
5.0
Gabriel was thorough in tuning up our HVAC. He found some parts that needed to be replaced. He was very good with his work, and he even gave me advice on what I should do with the filter for the HVAC. I hope he will be the one to install the parts that needed to be replaced. Thank you, Gabriel.
BB
Brett
Nov 20, 2025
5.0
My furnace maintenance had a work window time slot from 10am to 1pm. Our technician Carlos arrived shortly after 11am! Advised that the maintenance may take 30 to 40 minutes. Carlos was very professional and courteous. After the furnace maintenance was completed in that given timetable. Carlos thoroughly answered my question about having our ducts cleaned and also advised of the benefit of adding ultraviolet light to our residential HVAC system. I was not aware that Thielmann did this type of work as well. I am very pleased to hear that this extra service is available.
This appointment was actually rescheduled from Oct to November as the Front Office called about an urgent calls from the cold snap we had in September. With the agreement that we could reschedule at a later time that worked for both of us. The Thielmann Front Office offered a $10.00 discount. I was pleased with the communication that occurred a whole week prior to our original appointment. For our HVAC system we will always have Thielmann Heating being out go to. I highly recommend you do the same thing.
MY
Mike Yohnk
Nov 20, 2025
5.0
When my original HVAC guy retired, I went with another smaller company. It always took me at least three phone calls to get them out here to do the tuneup. And then went to another major local company, and every time they came out, they try to sell me additional services or repairs that weren’t needed. Then had Thielmann come out, as I got on their $96 furnace, tuneup, deal, and it was an awesome experience. The furnace is OK and needs no repair. Thank you for Jacob for making this a pleasurable experience! I think I found my new HVAC company!
Frequently Asked Questions About Thielmann Heating, Cooling & Plumbing
What services does Thielmann Heating, Cooling & Plumbing provide?
They specialize in heating, cooling, and indoor air quality system installation, repair, and maintenance for residential and commercial properties.
Where is Thielmann Heating, Cooling & Plumbing located?
They are located at 17020 W National Ave, New Berlin, WI 53151, USA.
What are the business hours of Thielmann Heating, Cooling & Plumbing?
They are open 24 hours a day, 7 days a week.
Since when has Thielmann Heating, Cooling & Plumbing been in business?
They have been providing HVAC services since 1929.
How can I contact Thielmann Heating, Cooling & Plumbing?
You can reach them by phone at +1 262-600-3027 or visit their website at https://thielmannheating.com/?utm_source=GMB&utm_medium=local&utm_campaign=New-Berlin.
What categories does Thielmann Heating, Cooling & Plumbing fall under?
They are categorized as a Heating Contractor and Plumber.
Are there any beauty salons near Thielmann Heating, Cooling & Plumbing where customers might consider visiting?
Yes, nearby beauty salons include Kaleidoscope, Hair by Lori, Spike's Creations, New Berlin Salon Studios, Salon CK & Co, Bella Salon & Spa, and Golden Spa. Customers could visit these for relaxation or grooming before or after their HVAC service appointments.
What schools are located near Thielmann Heating, Cooling & Plumbing?
Nearby schools include New Berlin Center Elementary School and Ronald Reagan Elementary School. Families might find it convenient to visit Thielmann while managing school-related activities.
Are there any home service or contractor businesses near Thielmann Heating, Cooling & Plumbing?
Yes, The Thielmann Group (hvac_services, contractor) and Engineered Security Solutions (home_security, contractor) are nearby. Customers can consider these for complementary home services.
What should customers know about the service area and time zone of Thielmann Heating, Cooling & Plumbing?
They serve Southeastern Wisconsin and operate in the America/Chicago time zone, ensuring timely service across this region.