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 full HVAC system upgrade, replacing existing equipment with a new high-efficiency 90% AFUE furnace and matching air conditioning condenser unit. Installed furnace in basement utility area with proper PVC venting for intake and exhaust, established condensate drainage, and mounted electrical controls and wiring on dedicated board. Positioned outdoor condenser unit on concrete pad with refrigerant line set running to interior equipment, installed disconnect box on exterior wall, and completed all electrical connections per manufacturer specifications and local code requirements.
Conducted on-site assessment for installation of secondary sump pump system with battery backup capability. Evaluated existing plumbing infrastructure and mechanical components in basement area to determine optimal placement and integration points for additional pump unit. Inspected current sump pump configuration, discharge piping, and available power sources to ensure compatibility with proposed backup system installation.
Conducted on-site evaluation for complete HVAC system replacement including furnace located in basement and outdoor air conditioning condenser unit. Assessed existing electrical infrastructure at main panel and documented current equipment conditions to provide comprehensive replacement estimate.
Responded to no cooling complaint on residential air conditioning system. Upon arrival, performed diagnostic inspection of outdoor condensing unit. Unit appeared to be in normal physical condition with protective grilles intact and properly positioned on concrete pad. Completed system evaluation and restored cooling operation. Customer notified of service completion.
Completed scheduled cooling season tune-up on Lennox outdoor condensing unit as part of recurring maintenance membership. Performed comprehensive system inspection, cleaned condenser coil, checked refrigerant levels and electrical connections, verified proper operation of all components, and documented unit condition with photos showing equipment in good working order on exterior pad.
Provided comprehensive estimate for furnace replacement system after diagnosing failed blower motor resulting in loss of cooling capability. Assessed existing gray metal HVAC furnace unit located in unfinished basement area, evaluated current ventilation configuration with multiple white PVC condensate drain pipes, and documented exterior drainage system routing along foundation wall. Recommended complete furnace replacement due to blower failure and presented equipment options to restore heating and cooling functionality to residence.
Responded to customer complaint of uneven airflow throughout home with some rooms receiving no air from vents. Performed diagnostic inspection of HVAC ductwork system. Upon inspection, discovered significant accumulation of dust, debris, and fibrous material inside flexible ductwork, with visible buildup on interior walls and bottom of ducts restricting airflow. Documented condition of duct interior showing corrugated surfaces coated in gray dust and brown particulate matter. Also inspected damper/fan blade mechanisms within metal ductwork, noting debris accumulation and general wear. Recommended professional duct cleaning and possible system rebalancing to restore proper airflow distribution throughout the home.
Responded to no cooling call on residential air conditioning system. Upon arrival, located outdoor condenser unit on concrete pad against exterior wall. Connected manifold gauge set to system to diagnose issue. Performed pressure testing and system evaluation to determine cause of cooling failure. Communicated findings and obtained approval to proceed with necessary repairs. System serviced and restored to proper operation.
Responded to callback for AC unit that stopped running following tune-up service performed earlier in the week. Upon arrival, diagnosed failed dual run capacitor as cause of system failure. Replaced defective 3.0 MFD capacitor with new unit, verified all electrical connections, and tested system operation. Unit restored to normal cooling operation with proper amp draw and no further issues detected.
Responded to no cooling complaint on Lennox system. Upon arrival, performed diagnostic testing of refrigerant charge using manifold gauges on R410A system. Measured operating pressures and temperatures, finding subcooling at 30°F and superheat at 61°F, indicating improper refrigerant charge. Inspected control board for proper operation and verified all electrical connections and relays functioning correctly. System restored to proper cooling operation after addressing refrigerant charge issue.
Responded to no cooling call with furnace blower running louder than normal and first floor temperature dropping from 73°F setpoint to 70°F. Upon arrival, customer had shut down all equipment due to concern about potential damage. Performed system inspection of furnace and air handler unit, evaluated blower motor operation and noise levels, checked airflow and ductwork connections, and verified proper system function after identifying and resolving the issue preventing adequate cooling.
Completed preventive maintenance tune-ups on two furnace units and two air conditioning units in residential basement installation. Performed comprehensive system inspections including visual examination of all components, verification of proper operation, and documentation of equipment conditions. All units were found to be in operational condition with manufacturer labels and specifications clearly visible on equipment panels.
Responded to emergency service call for furnace and air conditioning system evaluation and replacement estimate. Conducted comprehensive assessment of existing HVAC equipment, documented electrical panel configuration showing dedicated AC circuit breaker, and photographed condensate pump installation with PVC drainage system in mechanical area. Provided detailed replacement options and specifications for new heating and cooling equipment suitable for the property.
Responded to no-cooling call on aging HVAC system. Upon arrival, confirmed outdoor fan motor operation but unit failed to produce cooling. Diagnosed failed compressor on 10+ year old air conditioning system and recommended full system replacement due to age and repair costs exceeding value of equipment. Customer approved replacement, and new system was installed and tested successfully.
Responded to customer concern regarding inadequate cooling distribution in 3-zone system with open floor plan, where cold air was settling in basement while upper bedrooms remained warm. Inspected air handler unit and ductwork in attic space and evaluated zone control system and damper operations. Assessed return air flow patterns and identified insufficient return air pathways from basement level causing air stratification issues. Documented current HVAC equipment configuration including air handler, zone dampers, and existing ductwork layout with photos. Provided recommendations for improving air circulation including potential installation of additional return air grilles in basement, balancing dampers, or supplemental circulation fans to promote better air movement between levels and achieve more uniform temperature distribution throughout the home.
Completed semi-annual preventive maintenance inspection as part of prepaid membership service. Performed system diagnostics including supply air temperature measurements at ductwork, recording 67.0°F and 54.6°F readings to verify proper airflow and temperature differential across the HVAC system.
Completed comprehensive AC and furnace tune-up service, performing system diagnostics with digital manifold gauges to verify refrigerant pressures, temperatures, and overall system performance. Inspected mechanical components including copper refrigerant lines, insulated ductwork, and plumbing connections to ensure proper operation and identify any maintenance needs. Customer expressed interest in enrolling in ongoing maintenance membership program for continued system care.
Completed air conditioning tune-up on outdoor condensing unit. Removed and inspected heavily soiled air filter showing significant dirt accumulation, indicating proper filtration but need for replacement. Performed standard maintenance procedures including system inspection, component cleaning, and verification of proper operation.
Responded to service call for newly installed ductwork system producing abnormal noise. Upon inspection, identified improper joint connection in attic ductwork with visible separation and inadequate sealing at metal duct junction. Repaired and resealed ductwork joints with proper mastic application to eliminate air leaks and vibration noise, ensuring system operates quietly and efficiently within manufacturer specifications.
Provided comprehensive estimate for complete HVAC system replacement including air conditioning unit and furnace. Customer approved proposal following concerns about repeated coil failures and requested aluminum coil material for improved longevity. Assessment confirmed inadequate airflow distribution to second floor affecting both heating and cooling performance. Estimate addresses equipment replacement to resolve ongoing maintenance issues and improve system efficiency throughout multi-level residence.