Your Local Heating and Cooling Experts since 1929

The weather in West Bend can pose a challenge to maintaining home comfort. Whether the temperatures get extremely high or low, it’s important to ensure that your HVAC system can handle it.
Our team of professionals are available to help you with all your HVAC repair needs in the local West Bend, Wisconsin area. With over 90 years of experience, we can ensure that your systems are working efficiently so that you can enjoy comfortable temperatures in your home or business.
For HVAC and air quality services in West Bend, look no further than The Thielmann Group. Contact us online or call (262) 299-6197 to get started.
Heating Services
Looking for reliable heating solutions in West Bend? Look no further than The Thielmann Group. With our expert team and top-notch services, we guarantee the highest standards in equipment sizing and installation. Our heating products, including energy-efficient and quiet Lennox furnaces, ensure your peace of mind.
- Furnace repair
- Furnace installation
- Heat pump system repair
- Heat pump installation
- Boiler repair and replacement
- Packaged units
- Commercial heating systems
Our licensed technicians offer trustworthy HVAC and furnace repair services in West Bend, Wisconsin and will restore your heat promptly. We understand the urgency of “no heat” situations during harsh Wisconsin winters.
Our NATE-certified specialists are available 24/7 for emergencies, capable of servicing and repairing all makes and models. Contact us for all your heating or furnace repair needs in West Bend.

Air Conditioner Repair and Installations
If you need a new air conditioning system for your home or business, we have the perfect solution to keep you cool and fit your budget. Our experienced team will ensure a flawless air conditioning installation and the system will be 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.
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.
We proudly offer top-notch Lennox, Daikin, Carrier, Bryant and Mitsubishi air conditioning products, known for their industry-leading performance and energy efficiency. With these systems, you will stay comfortable during hot Southeastern Wisconsin summers while saving on energy bills.
Our technicians also offer air conditioning repair services and can work with you to replace damaged parts in your old system. Give us a call for all your air conditioning needs in West Bend.
Indoor Air Quality
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 HVAC repair solutions to improve your indoor air quality. Trust us to create a fresh and comfortable atmosphere for you and your loved ones.
- Air purifiers
- Humidifiers
- Dehumidifiers

West Bend, WI Plumbing Services You Can Rely On
When plumbing issues disrupt your day, Thielmann Heating, Cooling, and Plumbing provides dependable plumbing services in West Bend, WI. Our licensed plumbers handle everything from small repairs to full system replacements with precision and care. You get honest recommendations, upfront pricing, and quality results every time.
We repair leaky pipes, clogged drains, and fixtures that don’t want to work as they should, working to quickly prevent any further damage. If your water heater fails, our team can repair or replace it with an energy-efficient model that fits your home’s needs. We also install sump pumps and water treatment systems to keep your water clean and your basement dry.
Homeowners across West Bend trust Thielmann for reliable plumbing services that keep their homes running smoothly. We combine decades of experience with modern tools to ensure every job meets local codes and high standards of craftsmanship. Whether you need maintenance, emergency service, or a full upgrade, we’re ready to help.
Common plumbing services in West Bend include:
- Water heater repairs and replacements (tank and tankless)
- Sump pump repair and installation
- Drain cleaning and clog removal
- Pipe repair and replacement
- Garbage disposal repair and installation
- Fixture upgrades for kitchens and bathrooms
- Water treatment and filtration systems
If your home in West Bend needs plumbing service, don’t wait until a small leak becomes a major problem. Call Thielmann Heating, Cooling, and Plumbing for fast, dependable help. Our technicians are available for routine maintenance and 24/7 emergency service to restore comfort and peace of mind.
Why Choose The Thielmann Group
Since 1929, our team has been the go-to choice for top-quality residential and commercial HVAC services in West Bend and beyond. Our NATE-certified technicians can service all brands, install Lennox-brand units, 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 West Bend, WI
Job Locations and Reviews
Conducted an on-site assessment for whole home dehumidifier installation in residential basement utility area housing existing HVAC equipment. Evaluated current furnace setup, ductwork configuration, available space, and electrical requirements to provide comprehensive estimate for IAQ system integration with existing infrastructure.
Completed comprehensive tune-up maintenance on residential HVAC system including both indoor air handler unit and outdoor condensing unit. Performed refrigerant pressure diagnostics using manifold gauges, inspected all electrical connections and components, verified proper drainage and condensate management on indoor unit, and ensured optimal system operation throughout both heating and cooling components.
Conducted on-site evaluation for complete HVAC system replacement at residential property with existing Lennox equipment. Customer currently operating a natural gas furnace located in basement with outdoor air conditioning condenser unit. System serves a three-zone configuration requiring proper equipment sizing and compatibility. Assessed current equipment specifications and determined replacement requirements of 110,000 BTU furnace capacity and 4-ton air conditioning unit to adequately serve the home's heating and cooling demands across all three zones. Photographically documented existing Lennox outdoor condenser unit, noting manufacturer labels, technical specifications, warning decals, and overall equipment condition. Unit positioned against exterior wall with heat exchanger fins visible and accessible for inspection. Examined internal wiring configuration and electrical connections within existing equipment, documenting wire routing, color coding, and component connections for
Completed furnace and air conditioning tune-up maintenance on residential HVAC system. Performed comprehensive inspection of outdoor condenser unit and indoor furnace with Space-Gard air filtration system, verified proper operation of all components, checked refrigerant levels, cleaned coils, inspected ductwork and ventilation, and confirmed system is operating within manufacturer specifications.
Conducted on-site evaluation of existing air conditioning system for proactive replacement estimate. The current outdoor condensing unit, which has been in service for over 20 years, remains operational but has reached the end of its expected service life. Documented existing equipment installation including electrical panel configuration and outdoor unit placement on concrete pad adjacent to brick exterior wall. Photographed circuit breaker panel showing current electrical service and outdoor condenser unit positioned in landscaped area with proper clearances. Provided comprehensive replacement options and recommendations for new high-efficiency cooling system to ensure continued reliable operation and improved energy performance.
Provided estimate for complete HVAC system conversion from existing boiler heating system to forced air furnace and air conditioning in unfinished basement. Assessed current mechanical room layout, existing ductwork requirements, and equipment placement options for new forced air system installation. Also evaluated dryer vent routing feasibility for proposed laundry relocation to upper level.
Completed preventative maintenance tune-up on Lennox air conditioning system. Upon arrival, found outdoor condenser coil heavily fouled with dirt, debris, pollen, and organic matter significantly restricting airflow through heat exchanger fins. Performed thorough coil cleaning to remove accumulated buildup and restore proper heat transfer efficiency. Cleared debris from base of unit and surrounding area. Completed full system inspection and operational testing to ensure proper cooling performance.
Conducted estimate for replacement of non-operational 4-ton Lennox rooftop unit on single-story commercial building. Assessed existing RTU showing signs of weathering and corrosion, documented equipment condition and rooftop access via built-in ladder with hatch, and determined crane will be required for removal and installation due to rooftop configuration and equipment weight.
Responded to water accumulation issue beneath furnace. Systematically inspected furnace, water heater, dehumidifier, and AC unit, confirming no leaks from these sources. Investigation focused on sump pump system and water softener as likely sources, with photographic documentation of sump basin containing murky water and operational pump assembly with float switch mechanism.
Responded to no cooling complaint with attic unit freezing over. Upon inspection, found residential split system HVAC equipment located in attic space with outdoor condensing unit mounted on exterior platform. Documented equipment information including manufacturer data from unit labels for aging system over 10 years old. Assessed frozen evaporator coil condition and identified potential causes including restricted airflow, low refrigerant charge, or failed blower motor operation. Verified ductwork connections and insulation integrity in attic installation. Inspected outdoor unit for proper operation, checked refrigerant line insulation running along exterior wall, and evaluated condensate drainage system. Provided customer with equipment age assessment, diagnostic findings, and repair recommendations to restore cooling function and prevent future freeze-up conditions.
Completed routine cooling system maintenance visit on Lennox air conditioning system and furnace. Performed comprehensive inspection of outdoor condenser unit, verifying proper operation of compressor, condenser fan, and refrigerant levels. Checked electrical connections at disconnect box and confirmed secure mounting on concrete pad. Inspected indoor furnace unit and associated ductwork in mechanical room, ensuring all components were functioning correctly and venting systems were properly installed and secure.
Completed on-site estimate for replacement of 28+ year old air conditioning system that was no longer maintaining adequate cooling capacity. Assessed existing HVAC equipment in basement utility area, including furnace/air handler unit, galvanized ductwork, and flexible duct runs. Evaluated outdoor condenser unit with copper fins showing age-related wear, along with associated refrigerant lines, condensate drainage system, and electrical connections. Documented current system configuration including PVC condensate piping and equipment placement over decorative rock bed. Provided replacement recommendations to restore proper cooling performance.
Completed full HVAC system installation including new furnace and air conditioning unit. Three-person crew successfully removed existing equipment and installed complete replacement system in one day, with all refrigerant lines properly connected, electrical service established, and system tested for proper operation using calibrated diagnostic equipment.
Conducted estimate for replacement of leaking 50-gallon A.O. Smith natural gas water heater. Assessed existing unit and provided customer with options for both traditional tank-style and tankless water heater systems to meet their needs.
Completed scheduled cooling system maintenance visit as part of membership agreement. Performed comprehensive inspection and service of Lennox HVAC system including indoor furnace/air handler unit in basement mechanical room and outdoor condensing unit. All equipment found operating within normal parameters with proper airflow, refrigerant levels, and electrical connections verified.
Responded to customer complaint of banging water pipes (water hammer) that began approximately one month ago, along with temperature fluctuation issues during shower use when washing machine was operating simultaneously. Performed comprehensive plumbing system inspection, examining water supply lines, shut-off valves, and pressure regulation components in utility area. Documented existing plumbing configuration including PVC drainage, copper supply lines, braided flex connectors, and valve assembly. Provided assessment of water hammer causes and recommended solutions, and prepared quote for replacement installation of two toilets as requested.
Responded to no cool complaint on recently installed warranty system blowing warm air. Upon arrival, connected refrigerant manifold gauges to measure system pressures and temperatures. Diagnostics revealed abnormal refrigerant charge levels with low-side pressure reading 52.3 and high-side pressure reading 136.7, indicating insufficient refrigerant in the system. Performed systematic leak check and pressure testing to identify source of refrigerant loss. System showed signs of installation-related issue affecting cooling capacity. Corrected refrigerant charge to manufacturer specifications, verified proper airflow through return grille, and confirmed furnace and ductwork connections were secure. System restored to proper cooling operation with pressures and temperatures within normal range.
Responded to warranty callback for no cooling issue with reported gas leak on refrigerant line. Inspected dual air handling unit installation, verified leak location, and documented system condition with photos showing open access panels and internal components. Coordinated with warranty inspector findings and confirmed refrigerant line requires repair to restore proper system operation.
Installed customer-supplied single-handle kitchen faucet on double-basin stainless steel sink. Completed mounting and connection of the modern tall-spout faucet with black accent handle, ensuring proper positioning between basins and verifying all supply line connections for leak-free operation.
Conducted comprehensive assessment of 18-year-old Lennox zoned HVAC system located in basement. Evaluated existing furnace and air conditioning equipment, documented outdoor condenser unit condition showing weathering and algae growth on concrete pad, and inspected basement ductwork installation including UV air purification device and refrigerant lines. Provided replacement estimate with multiple equipment brand options to meet customer requirements for complete system upgrade.