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
Menomonee Falls, WI at a glance
Thielmann Heating, Cooling & Plumbing has completed 20 jobs in Menomonee Falls, WI in October 2026.
The most recent job was on October 15, 2026.
Thielmann Heating, Cooling & Plumbing has completed 292 jobs in Menomonee Falls, WI in the last 12 months.
Job Locations and Reviews
Performed an indoor air quality (IAQ) estimate, inspecting the Daikin gas furnace, galvanized supply plenum and ductwork, PVC venting, and the atmospherically vented water heater in the basement mechanical area. Equipment and ductwork appeared clean and in good condition with no visible rust, frost, or damage, and an existing cabinet-style device (air cleaner/humidifier) was noted on the supply duct. Documented the system with photos to evaluate IAQ improvement options.
Performed an on-site estimate for replacement of a gas power-vent water heater, assessing the existing tank, PVC exhaust venting, gas supply piping, and surrounding supply plumbing for code-compliant removal and installation. Also evaluated the sump pump system for replacement with a battery backup unit, documenting existing conditions and noting that clutter and stored materials in the work areas will need to be cleared for safe access.
Responded to a no-heat complaint (warm air at vents with furnace not firing) and performed a full furnace tune-up, inspecting the air handler, plenum transition, condensate drain piping, and refrigerant line connections, with no visible rust, frost, or cracking noted. Also completed a humidifier tune-up to restore proper operation and ensure the system is running safely and efficiently.
Installed a new Bradford White gas-fired tank water heater with copper supply piping, brass fittings, and isolation valves, and added a thermal expansion tank to protect the system from pressure fluctuations. Connected the galvanized flue vent to the chimney with proper elbow routing, then verified connections and confirmed the unit was free of leaks and operating correctly.
Performed a seasonal heating maintenance inspection on the gas furnace, removing the access panel to visually inspect the burner assembly, gas valve, inducer blower motor, flame sensor wiring, and condensate/venting PVC piping. All components were found intact with light dust accumulation and no signs of rust, frost, or physical damage, indicating the unit is in good operating condition and ready for the heating season.
Diagnosed a no-hot-water complaint on a gas-fired tank water heater where the pilot would light briefly but fail to stay lit, inspecting the unit, gas supply piping, flexible connectors, and galvanized vent connection with no visible leaks, corrosion, or venting obstructions. Performed repair to restore reliable pilot and burner operation, then relit the appliance and verified sustained flame and proper draft. System is operating normally and producing hot water.
Completed comprehensive furnace and air conditioning tune-up service on residential HVAC system located in mechanical space. Performed standard preventive maintenance inspections on heating and cooling equipment, including examination of condensate pump assembly, drainage systems, and associated PVC piping configurations. All system components inspected and found operating within normal parameters.
Completed comprehensive furnace and air conditioning tune-up service including inspection of outdoor condensing unit and associated plumbing components. Unit exterior showed normal seasonal debris accumulation; all mechanical systems inspected and verified operational, with water heater ventilation and PVC drainage systems confirmed properly installed per manufacturer specifications.
Completed comprehensive furnace tune-up including full system inspection, testing of all safety controls, and verification of proper operation on Lennox heating unit. Inspected control board connections, burner assembly, heat exchanger, and blower components; all systems found operating within manufacturer specifications with no issues identified.
Responded to no cooling callback on residential HVAC system. Upon arrival, connected manifold gauges to outdoor condensing unit and performed system diagnostics. Pressure readings indicated abnormally high head pressure on the high side (687 psig) and elevated suction pressure on the low side (585 psig), with superheat reading of 71°F suggesting potential airflow restriction or system overcharge. Removed top access panel to inspect condenser fan operation and internal components. Based on gauge readings and visual inspection, identified issue preventing proper cooling operation and addressed accordingly to restore system functionality.
Responded to customer complaint of delayed start on air conditioning unit occurring over several nights. Performed diagnostic evaluation using digital manifold gauges to assess system pressures and temperatures on Lennox Elite unit. Verified thermostat operation and settings, confirming unit communication and proper display function at 65°F current temperature with 70°F setpoint.
Completed on-site evaluation of existing natural gas furnace and air conditioning system located in basement. Both units are operational but aging and nearing end of serviceable life. Documented current equipment configuration including outdoor condensing unit on concrete pad with proper electrical disconnect, and basement-mounted furnace with existing ductwork infrastructure. Provided comprehensive replacement estimate for new high-efficiency furnace and AC system to homeowner.
Completed full boiler replacement in basement mechanical room with all required permits and licensed electrician coordination. Installed new boiler unit with complete copper piping distribution system, expansion tank, water filtration system, gas valving with safety shutoffs, and proper venting through foundation wall with sealed penetration. All connections, fittings, ball valves, and control wiring installed to manufacturer specifications and local code requirements, with system tested and operational upon completion.
Completed comprehensive tune-up service on both furnace and air conditioning system. Performed standard maintenance procedures including inspection of condensate drain assembly with copper refrigerant lines, verified proper operation of outdoor condenser unit, and conducted system diagnostics with manifold gauges to ensure optimal performance of both heating and cooling equipment.
Completed comprehensive tune-up on residential HVAC system including furnace and air conditioning condensing unit. Performed standard maintenance inspection of indoor air handler with verification of refrigerant lines, condensate drainage system, gas connections, and electrical components. Conducted outdoor condensing unit evaluation with electrical testing using multimeter to verify proper voltage and amperage readings, ensuring system operating within manufacturer specifications.
Responded to no heat call with reported odor and non-functioning air conditioning system. Upon arrival, inspected residential furnace unit in utility closet and found system operational with ambient temperature reading of 72.9°F. Performed visual inspection of furnace cabinet, refrigerant lines, condensate drain, and ductwork connections. No active fault conditions detected at time of service call. Unit appeared to have accumulated normal dust and debris on exterior surfaces. All visible components including copper refrigerant lines with insulation, PVC condensate piping, and electrical connections showed no signs of immediate failure or safety concerns.
Completed comprehensive tune-up and inspection on residential HVAC system, unit model A95UH100700B123-03. Performed standard maintenance procedures including inspection of evaporator coil assembly, refrigerant lines, and internal components. All mechanical and electrical systems verified operational, with unit showing normal wear patterns consistent with age and usage.
Completed estimate for replacement of aging HVAC system including natural gas furnace and air conditioning unit. The existing furnace, manufactured in 1997 and located in the basement, remains operational but has reached end of service life. The outdoor condenser unit shows visible deterioration with significant rust on fan components and motor mounting areas. Provided comprehensive replacement options for both heating and cooling equipment to address the aging system and improve efficiency and reliability.
# Preventive Maintenance Service Completed Performed comprehensive cooling system tune-up on residential Lennox air conditioning unit as part of recurring membership maintenance agreement. Conducted complete system diagnostics using Fieldpiece SMAN refrigerant manifold to verify proper refrigerant pressures, temperatures, and overall system performance. All measured parameters including suction and discharge temperatures, superheat, and subcooling readings were within manufacturer specifications. Inspected condensing unit exterior condition, verified proper airflow through condenser coil louvers, and confirmed secure mounting on equipment pad. Checked electrical connections, refrigerant line insulation, and PVC condensate drain routing for proper installation and function. Unit operating efficiently with no deficiencies noted during inspection.
Evaluated existing Richmond 40-gallon power vent water heater nearing end of service life in basement utility area. Documented current installation including copper supply lines, gas connections, venting system, and surrounding plumbing infrastructure to provide accurate replacement estimate.