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 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.
Inspected and documented customer's stainless steel sink with existing garbage disposal installation. System includes black disposal unit with proper rubber flaps in drain opening, connected to white PVC drain assembly with standard P-trap configuration. All components appear functional with normal wear patterns visible on sink surface.
Performed routine HVAC tune-up service including replacement of air filter with new pleated filter. Conducted electrical diagnostics using Fieldpiece SC680 multimeter, measuring terminal voltage at 39.98V and inspecting wiring connections. All components tested within normal operating parameters.
Performed comprehensive tune-up on aging HVAC system. Inspected heat exchanger tubes showing significant heat discoloration and early signs of corrosion. Cleaned burner assembly, verified proper flame pattern, and confirmed secure mounting of mechanical components. System is operational but customer advised that heat exchanger may require replacement within next 1-2 seasons due to visible wear patterns.
Conducted inspection of bathroom chrome shower/tub handle fixture mounted on beige tiled wall. Documented condition of lever-style handle with shield-like backing plate showing signs of water condensation. Fixture appears properly secured with mounting screws at top and bottom positions.
Performed thorough inspection of HVAC system and identified severely corroded heat exchanger with significant rust damage. Discovered multiple evaporator coils with deterioration and frost buildup, indicating refrigerant flow issues. Replaced damaged components and restored system to proper working condition.
Performed routine tune-up on Goodman furnace system. Inspected and cleaned components, checked electrical connections, and verified proper operation of the Honeywell thermostat (currently set to 65°F with system functioning normally). Examined PVC ventilation pipes and ductwork connections for integrity. System is operating within normal parameters with no immediate concerns identified.
Inspected and repaired plumbing system under cabinet, including replacement of deteriorated P-trap assembly. Installed new PVC drain pipes with proper connections and secured with metal clamps to ensure leak-free operation. Addressed adjacent wall damage near installation area for complete service resolution.
Completed installation of a new Goodman HVAC complete system at customer's residence. Successfully mounted outdoor condensing unit on concrete pad, connected refrigerant lines, and installed all necessary electrical components. System was properly evacuated, charged, and verified to be operating within manufacturer specifications. All connections were leak-tested and the condensate drain line was properly installed and tested.
Completed inspection of under-sink plumbing installation. Assessed garbage disposal unit and drainage configuration, including corrugated drain hose routing. Examined connection points to wall plumbing, confirming proper installation of brass/copper fittings and ensuring secure attachment of all components.
Diagnosed and serviced 10+ year old furnace experiencing no heat condition. Removed access panel to inspect internal components, revealing faulty ignition system and heavily corroded heat exchanger. Replaced ignition assembly and performed comprehensive system cleaning to restore heating function, but recommended unit replacement within 6-12 months due to age-related deterioration and safety concerns.
Performed routine maintenance service on Armstrong Air furnace unit. Conducted thorough inspection of system components and ductwork connections. Replaced existing air filters with new pleated filters to improve system efficiency and indoor air quality.
Performed standard HVAC maintenance service on unit. Conducted electrical testing with SC680 clamp meter, verifying current draw at 0.30A. Inspected burner assembly showing proper combustion with uniform blue flame pattern, indicating efficient operation.
Completed installation of a standard water heater in basement utility area, including proper connection of all plumbing lines and installation of expansion tank. System was tested for proper operation and all safety features were verified to be functioning correctly.
Performed inspection of residential water supply system, documenting significant copper pipe corrosion and water damage at connection points. Observed extensive oxidation with characteristic greenish-blue patina on copper pipes emerging from concrete floor, along with deterioration of surrounding materials and possible moisture-related damage. Recommended replacement of corroded supply lines and valve assemblies to prevent potential leaks and system failure.
Performed routine tune-up service on Lennox HVAC furnace system with integrated Aprilaire humidifier. Inspected all components including ductwork, PVC exhaust/intake pipes, and electrical connections. System is functioning properly with no operational issues identified. Replaced air filter with new Filtrete filter to maintain optimal airflow and efficiency.
Completed comprehensive assessment for HVAC system replacement, including inspection of aging outdoor air conditioning condenser showing significant weathering and the existing indoor furnace unit installed against basement wall. Documented current system condition with photos, noting ventilation, electrical connections, and mounting configurations to prepare detailed replacement proposal.
Performed routine maintenance on HVAC system, replacing the air filter with a new pleated filter to ensure optimal airflow. Inspected metal ductwork connections and seams, confirming proper installation with no visible leaks or structural issues.
Performed comprehensive tune-up service on Crown boiler system located in basement utility area. Inspected all components including circulator pump, copper piping connections, and metal vent stack for proper installation and operation. Cleaned and tested system, confirming optimal performance with no issues detected in the heating equipment.