Your Local Heating and Cooling Experts since 1929
Our team of professionals are available to provide superior heating, HVAC, and air conditioning services for homes and commercial properties in Menomonee Falls, Wisconsin. Our number one priority is customer satisfaction, and we go above and beyond to ensure you receive the best service possible.
With our team of Nate-certified technicians and friendly office staff, we are dedicated to delivering exceptional results. We understand the importance of a comfortable home or workplace, and that is why we are committed to providing reliable heating and cooling solutions all year round.
For HVAC services in Menomonee Falls, look no further than The Thielmann Group. Contact us online or call (262) 299-6197 to get started.
Menomonee Falls Heating and Air Conditioning Company
Looking for reliable heating and cooling services in Menomonee Falls? Look no further than our team! With a strong reputation since 1929, our expert staff ensures top-notch equipment installation and repair. We take pride in offering the best heating products, installation, and services in Waukesha County.
We offer various types of heating and HVAC options, including:
- Heating repair
- Heating maintenance
- Furnace repair
- Furnace replacement
- Boiler repair and installation
- Heat pump system installation
Our factory-trained and NATE-certified professionals are ready to get the job done right. Rest assured, we’ve got you covered with prompt furnace repair services in case of any heating problems. Our NATE-certified specialists are available 24/7 to service and repair all makes and models. Stay warm during harsh Wisconsin winters – reach out to us for all your heating or furnace repair needs in Menomonee Falls, WI.

Air Conditioner Repair and Installation Services
Looking for a new air conditioning system? Look no further! We have the perfect solution to keep you cool and suit your budget. Our experienced team will ensure a flawless installation, perfectly sized to your space. Our technicians are factory trained and NATE-certified, equipped with years of knowledge to install your new central air or ductless system with superior workmanship. Stay cool with confidence!
We work on all types of cooling systems, including:
- Air conditioners: We can work on all models of air conditioning systems for residential and commercial properties.
- Heat pumps: We can repair, replace, or maintain energy-efficient heat pumps that deliver warm air inside and outside the home.
- Ductless mini-splits: We can service ductless HVAC units that provide total climate control for single rooms.
Duct Cleaning
The ductwork in your HVAC system plays a vital role, acting as the lungs of your home. Every bit of heated or cooled air flows through it, ensuring comfort and well-being. At The Thielmann Group we take pride in ensuring clean and healthy indoor environments for homes and businesses.
From humidity control and air purification to duct cleaning and more, we offer solutions to improve your indoor air quality. The ductwork in your HVAC system plays a vital role, acting as the lungs of your home. Every bit of heated or cooled air flows through it, ensuring comfort and well-being.
- Air purifiers
- Humidifiers
- Dehumidifiers

Why Choose The Thielmann Group
Since 1929, our team has been the go-to choice for top-quality residential and commercial HVAC services in Menomonee Falls and beyond. Our NATE-certified technicians can service all brands, provide 24/7 emergency care, and more. Rest assured, we have you covered for all your HVAC needs! Plus, we offer upfront pricing, financing options, special deals, and a job well done.
Contact us online or call (262) 299-6197 to schedule the HVAC services you need.
Read Reviews by Our Customers
EXCELLENT Based on 542 reviews Posted on Stephanie DolnikOctober 10, 2024Trustindex verifies that the original source of the review is Google. Everyone that I have ever came into contact with there has been helpful and wonderful! I would recommend them to anyone!Posted on Aaron WilhelmJuly 19, 2024Trustindex verifies that the original source of the review is Google. Gave me a quote to replace my 29 year old air conditioner.They weren’t the cheapest but were priced with in reason. Installed it quickly and operates wonderfully. I couldn’t be happier.Posted on Lisa FarrellJuly 19, 2024Trustindex verifies that the original source of the review is Google. My husband and I received 5 quotes from 5 different companies before finally deciding upon Thielmann. Although Thielmann was a bit more expensive, the quality we received was outstanding. We went through the Costco Program (Lesa at Menomonee Falls) and received more rebates in doing so. With that program, we received 10% back on our Lennox Air Conditioner and Lennox Furnace. In addition, we received another 2% back by going through Costco and another 2% back by putting it on the Costco Visa card. At any rate, from, Jason, who came to our house to explain what would be done and provide the estimate, to the installers, Ben and Hayden, who provided excellent care installing our new products. They spent the entire day replacing our new HVAC system. The guys were extremely professional and had great precision. Thank you, Thielmann, for a wonderful HVAC system, great customer service, and an amazing job!Posted on Dave SeefeldtJuly 19, 2024Trustindex verifies that the original source of the review is Google. Professional and fast! Installation looks great!Posted on De'Angelo TatumJuly 15, 2024Trustindex verifies that the original source of the review is Google. I liked my experience with them. The guys I spoke with prior to doing the work, the estimation phase , and the ones I spoke with after the work was completed had enough knowledge and suggestion to answer all my questions. I’m pleased with the job they did. I had two AC units installed.Posted on Jay OrcholskiJuly 14, 2024Trustindex verifies that the original source of the review is Google. Wayne helped us find the right equipment. Ben and Hyden were great with the install. Wonderful team, as I would highly recommend The Thielmann Group.Posted on Brad DeFauwJune 26, 2024Trustindex verifies that the original source of the review is Google. I recently had the pleasure of working with The Thielmann Group Heating & Air Conditioning to install a mini-split HVAC system for the second floor of our Cape Cod home in Cedarburg, WI, and I couldn't be more satisfied with the entire experience. Professionalism and Expertise: From the initial consultation to the final installation, the team at The Thielmann Group demonstrated exceptional professionalism and expertise. They took the time to thoroughly assess our home and understand our specific cooling needs. Their knowledgeable staff answered all our questions and provided valuable insights into the benefits of a mini-split system for our unique architectural setup. Quality Installation: The installation process was seamless and efficient. The technicians arrived on time, were courteous, and worked diligently to complete the installation with minimal disruption to our daily routine. They were meticulous in their work, ensuring that everything was installed correctly and neatly. I was particularly impressed with their attention to detail and their commitment to maintaining the aesthetic integrity of our home. Performance: The mini-split HVAC system has exceeded our expectations. The second floor, which used to be uncomfortably warm during the summer months, is now perfectly cool and comfortable. The system operates quietly and efficiently, providing consistent temperature control without any noticeable increase in our energy bills. The Thielmann Group's recommendation and installation of this system have significantly improved our home's overall comfort and livability. Customer Service: The customer service we received was outstanding. The Thielmann Group kept us informed throughout the entire process, from scheduling the installation to following up afterward to ensure everything was working properly. They genuinely cared about our satisfaction and went above and beyond to make sure we were happy with their service. Overall Experience: I highly recommend The Thielmann Group Heating & Air Conditioning to anyone in need of HVAC services. Their professionalism, expertise, and commitment to customer satisfaction are truly commendable. Our experience with them was nothing short of excellent, and we are thrilled with the results of our new mini-split HVAC system. Thank you, Thielmann Group, for your exceptional service and for making our home a more comfortable place to live!Posted on Gail EllenbeckerJune 22, 2024Trustindex verifies that the original source of the review is Google. Quick, through team
Recent Jobs and Reviews in Menomonee Falls, WI
Job Locations and Reviews
Performed routine tune-up service on residential HVAC system located in basement/utility room. Opened access panels to inspect interior components including circuit boards and wiring connections. Checked for signs of moisture damage and rust in air handler compartment, noting minor discoloration on metal surfaces. All components were found in working order with no major issues requiring repair.
Performed routine tune-up on Lennox HVAC system, inspecting both the furnace unit and associated humidifier/air purifier component. Checked PVC ventilation piping for proper installation and verified drainage system functionality. Conducted visual inspection of ductwork connections and electrical components, confirming all systems are operating within normal parameters.
Inspected ceramic tile shower stall with wall-mounted handheld shower head. Observed minor discoloration and water spots on tile surfaces, particularly on wall areas. Confirmed proper drainage and fixture functionality after evaluation.
Performed routine HVAC tune-up service. Utilized precision tools including Milwaukee screwdriver and trim removal tool to access system components for inspection. Completed standard maintenance procedures ensuring optimal system operation.
Responded to no heat complaint on dual furnace system. Discovered thermostat incorrectly set to cooling mode with 83°F reading while customer requested heat. Reset thermostat to heating mode, tested system operation, and confirmed both furnaces functioning properly.
Performed evaluation and installation of new HVAC system in residential basement setting. Replaced existing unit with a new furnace system, including proper connection of ductwork and integration with Honeywell NetAXS control panel. System was tested for proper operation after installation with all components functioning as designed.
Performed routine tune-up service on a Lennox furnace system located in basement utility area. Inspected and verified proper operation of all components including the venting system with PVC exhaust/intake pipes. Checked connections to ductwork and examined Thiele system labels for specifications during maintenance procedure.
Inspected toilet flange showing significant deterioration with visible rust, corrosion and mineral buildup. Documented damaged white plastic flange with brownish residue and sediment accumulation around the central opening. Recommended replacement of the deteriorated flange to prevent potential leaks and ensure proper toilet mounting.
Completed installation of new kitchen faucet with proper connection to existing plumbing system. Installed and verified operation of garbage disposal unit, ensuring secure connections with PVC drainage pipes and P-trap assembly. All fixtures were tested for proper function and absence of leaks before completion.
Installed and configured an Ion Technologies 30-35AC Battery Backup System for sump pump protection. System includes dual cooling fans, power supply, and indicator lights to ensure continuous operation during power outages. Mounted unit securely on wooden shelf against concrete block wall with proper electrical connections established.
Diagnosed and serviced 10+ year old heating system that was non-operational. Inspection revealed faulty control board preventing proper ignition sequence. Removed access panel, replaced defective control board, and reconnected all wiring harnesses (pink, green, yellow, white) to restore functionality. System now operating within manufacturer specifications after successful testing of heating cycle.
Responded to no-heat call for residential system under 10 years old. Upon inspection of the air handler unit in utility closet, identified a faulty ignition control module causing system failure. Replaced defective component, cleaned accumulated debris from around equipment, and verified proper operation through complete heating cycle test. System now functioning normally with consistent flame and appropriate temperature rise.
Conducted IAQ assessment on Rheem furnace system in basement utility area. Inspected ventilation components including PVC drainage pipes, metal ductwork, and connections. Documented radon mitigation system integration with HVAC equipment. Photos taken of complete installation for documentation purposes.
Completed installation of new gray furnace in confined utility room with proper connections to existing plumbing infrastructure. Installed white PVC exhaust venting and addressed moisture issues evident in concrete floor. Ensured all electrical connections were properly secured and system functioning according to specifications.
Responded to service call for HVAC system evaluation. Inspected electrical components and wiring connections in the air handler, noting proper installation of control board with intact wiring harnesses. Examined and cleaned humidifier assembly, confirming water distribution tube functionality and replacing mesh filter pad to ensure optimal humidity control performance.
Responded to no-heat call on furnace less than 10 years old. Diagnosed failed ignition system with multimeter testing revealing 4.942V at control board. Replaced faulty igniter assembly and verified proper system operation with successful ignition and normal heating cycle.
Responded to no-heat call for aging residential boiler system. Diagnosed failed ignition control module causing system shutdown. Replaced control module, cleaned flame sensor, and verified proper ignition sequence. System now functioning properly with consistent flame and normal operating temperatures.
Conducted inspection of existing Polar Express HVAC system in basement mechanical room. Documented condensate drainage setup with PVC piping and identified access panel components. Photographed system connections and surrounding infrastructure for replacement estimate purposes.
Performed scheduled tune-up on furnace system, conducting comprehensive inspection of internal components including control board, wiring connections, and safety mechanisms. Cleaned accessible components, verified proper operation of ignition sequence, and inspected filter which requires replacement within 30 days. System is operating within normal parameters with no immediate concerns identified.
Inspected attic plumbing system, identifying exposed copper supply lines requiring proper insulation. Installed insulation wrap on all accessible copper pipes to prevent potential freezing and maintain system efficiency. Verified all connections remained secure after installation.