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
Completed routine cooling season maintenance visit for residential split system air conditioning unit. Performed comprehensive inspection of outdoor condensing unit, verified proper operation of condenser fan motor and compressor, checked refrigerant levels and system pressures, cleaned condenser coil fins, and inspected electrical connections and components. Unit found operating within normal parameters with no deficiencies noted at time of service.
Completed furnace tune-up and air conditioning tune-up on residential HVAC system located in basement utility area. Performed comprehensive inspection and maintenance on gray cabinet furnace unit and air handler, including filter check, burner inspection, electrical connection verification, condensate drain line evaluation, and refrigerant line assessment. All equipment found operating within normal parameters with no immediate service needs identified.
Completed comprehensive tune-up service on two systems: a standard outdoor air conditioning unit with grid-style metal casing and a Mitsubishi Electric heat pump unit. Performed routine maintenance inspections, verified proper operation of both units, checked refrigerant lines and electrical connections, and confirmed all components were functioning within manufacturer specifications.
Completed routine cooling system maintenance on residential air conditioning unit. Performed comprehensive inspection of outdoor condenser unit, including cleaning of coil fins, verification of refrigerant levels, and testing of electrical components. System operating within normal parameters upon completion of tune-up service.
Completed assessment of dual sump pump system where one unit was running continuously and had caused thermal damage to the control switch mechanism. Inspected basement sump pit installation, documented existing PVC discharge piping configuration, and photographed damaged electrical control unit with burned switch component to provide estimate for repair or replacement of malfunctioning pump and associated wiring.
Responded to callback on new HVAC installation running continuously and unable to cool below 73 degrees. Performed diagnostic testing using multimeter and manifold gauge set to measure electrical values and refrigerant pressures, identifying and resolving system performance issues to restore proper cooling operation and thermostat cycling.
Conducted comprehensive HVAC system replacement estimate for residential property. Assessed existing outdoor air conditioning condenser unit and indoor Bryant furnace system, documenting current equipment condition and installation configuration. Evaluated ductwork, PVC condensate drainage, electrical connections, and overall system compatibility to provide accurate replacement recommendations and specifications.
Completed membership cooling maintenance visit and investigated customer-reported unusual fan winding noise from furnace that sounded like it needed lubrication. Performed comprehensive inspection of American Standard/Trane HVAC system including furnace and air handler unit. Accessed internal components by removing furnace panel to examine blower motor assembly, electrical connections, circuit boards, and mechanical components. Conducted diagnostic testing of blower motor operation and bearing condition to identify source of abnormal noise. Verified refrigerant line connections and system operation. Equipment inspected and serviced per membership agreement requirements.
Responded to emergency service call for generator estimate at residential property. Assessed utility room installation area in basement with existing HVAC equipment and evaluated exterior gas meter connection point on building exterior. Documented current utility infrastructure including gas supply lines, electrical routing through ceiling joists, and available clearances for generator placement. Provided comprehensive estimate for standby generator installation including required electrical integration, gas line modifications, and proper outdoor positioning relative to existing meter assembly.
Completed warranty replacement of evaporator coil on residential HVAC air handler unit located in basement mechanical room. Arrived during scheduled morning appointment window, removed failed coil, installed new replacement component, pressure tested system, and verified proper operation before departure.
Completed installation of Carrier air conditioning system with matching evaporator coil. System was charged with refrigerant and tested using digital manifold gauges, confirming proper operating pressures and temperatures across both high and low sides. All connections were verified leak-free, electrical disconnect installed, and unit commissioned to manufacturer specifications for optimal performance.
Performed complimentary AC system start-up and operational verification on recently installed equipment. Connected manifold gauge set to measure refrigerant pressures, confirmed system pressures were within manufacturer specifications, and verified proper system operation with no issues identified.
Conducted on-site assessment for new sump pump installation with pedestal configuration and battery backup system, as well as water heater replacement. Evaluated existing plumbing infrastructure and determined equipment specifications required for proper installation of all three systems.
Provided comprehensive estimate for replacement of aging Goodman furnace and air conditioning system located in basement installation. Current equipment is operational but customer requested proactive replacement to avoid future reliability concerns. Documented existing vertical furnace configuration with ductwork connections and electrical service panel for replacement specifications.
Installed water softener system in utility space with proper mounting brackets and secure positioning. Replaced toilet angle stop valve at wall connection point with chrome-finished fixture and connected braided flexible supply line. Completed tub trim installation. All plumbing connections tested for proper operation and verified no leaks present at angle stop valve or water softener connections.
Completed routine cooling system maintenance visit as part of membership agreement. Responded to thermostat alert indicating furnace issue requiring inspection. Performed comprehensive system evaluation of outdoor condensing unit and associated components. Delivered replacement air filters to customer as requested. All equipment inspected and found operating within normal parameters.
Responded to service call for furnace noise complaint. Inspected internal components and blower assembly. Documented equipment model ML260UH070AV3RB with photos of motor assembly, piping connections, and component identification labels for warranty records.
Completed AC spring start-up service with system diagnostics and temperature verification. Supply air temperature measured at 53.3°F and return air at 69.0°F, confirming proper system operation and adequate temperature differential for cooling mode. All equipment functioning within normal parameters.
Performed diagnostic inspection and operational checkout of recently installed battery backup sump pump system in coordination with JMI technician. Verified proper installation of backup pump components, PVC discharge piping, electrical connections, and battery backup functionality within existing sump pit. All system components confirmed to be operating within normal parameters.
Completed scheduled heating system maintenance visit as part of recurring membership agreement. Performed comprehensive inspection of HVAC equipment, including examination of valve cores and system components. Documented equipment condition with photos showing heating unit with copper-colored heat exchanger element and associated ductwork infrastructure.