Your Local HVAC Company since 1929

Thielmann Heating, Cooling, & Plumbing is the trusted choice for all your heating, ventilation and air conditioning (HVAC) and plumbing needs in Waterford, Wisconsin! Our number one priority is customer satisfaction, and we go above and beyond to ensure you receive the best service possible. Give our team a call at (262) 384-6407 to receive assistance with a malfunctioning HVAC or plumbing system or if you need efficient installation or maintenance services.
Waterford Heating Company
Do you need reliable heating services in Waterford? We work hard to provide the best heating products, installation and services in Waterford, Wisconsin.
Our trained professionals are always willing to take on routine and complex projects. Rest assured, we’ve got you covered with prompt, 24/7 service to repair all makes and models. Our heating services include:
- Heating repairs: Few things are as satisfying and convenient as turning on your heater after coming in from the cold. When your heater’s making loud noises, you notice strange odors or you’re not getting enough warm air, we can assist. We’ll drive to your property and repair the issue promptly.
- Heating installations: Trust our HVAC technicians to provide a durable, energy-efficient installation. From boilers to gas and oil furnaces, we can install them all.
- Heating maintenance: Be ahead of unexpected breakdowns. When you sign up for our maintenance program, you can enjoy regular heater checkups and an annual plumbing inspection.

Reliable Cooling Services
Keep your home comfortable and beat the heat with our air conditioner services, which include:
- AC repairs: We have the skills and knowledge to handle any air conditioner issues and will repair your cooling system with care.
- AC installations: If it’s time for a new AC, look to us. We use advanced tools and the latest industry techniques to install your air conditioner safely and according to compliance standards.
- AC maintenance: Annual tuneups can give you peace of mind and save you money in the long run. From clearing the drain line and pan to checking refrigerant levels, we’ll do a thorough checkup for a smooth-running unit.
We service various cooling systems, such as:
- Air conditioners: We can work on all models of air conditioners for residential and commercial properties, including central air conditioning systems.
- Ductless mini-splits: Request installation and maintenance services for ductless mini-split systems, perfect for homes without existing ductwork
- Packaged units: We can handle packaged unit systems for both residential and commercial properties.
- Heat pumps: Get repairs, installation and maintenance for energy-efficient heat pumps that deliver warm and cool air.
Indoor Air Quality Solutions
We understand the importance of clean and healthy indoor environments for homes and businesses. Our comprehensive solutions, including humidity control, air purification and duct cleaning and installation, are designed to enhance the quality of your indoor air.
Your HVAC’s ductwork is like your property’s lungs, ensuring comfort and well-being as heated or cooled air flows through the duct system. Achieve optimal indoor air quality with our comprehensive selection of air purification services in the local Waterford, Wisconsin, area:
Plumbing Services You Can Trust
Whether you’re busy with a complete property upgrade or need smaller plumbing repairs, our technicians can handle it all. No job is too big or too small for us, and we go above and beyond for every customer. If you need reliable, efficient plumbing services in and around Waterford, we’re the local choice you can rely on. Call us for the following plumbing services:
- Plumbing repairs
- Plumbing pipe and fixture installations
- Water heater replacements and repairs
- Hose bib services
- Sump pump services
- Faulty pipe repairs
- Toilet and faucet replacements
- Water conditioning services
- Faulty garbage disposal services
- Bath and kitchen remodels

Contact Thielmann Heating, Cooling, & Plumbing Today
Since 1929, our team has been the go-to choice for top-quality residential and commercial HVAC and plumbing services in Waterford, Wisconsin and beyond. We can service all brands, provide 24/7 emergency HVAC care and more.
We also provide expert plumbing services for homes and businesses, enabling you to enjoy a comfortable property. Rest assured, we have you covered for all your plumbing and HVAC needs! Plus, we offer upfront pricing, financing options, special deals and a job well done.
Contact us online or call (262) 384-6407 today. You can also schedule the 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 Waterford, WI
Job Locations and Reviews
Performed diagnostic inspection of HVAC system with focus on thermostat functionality. Confirmed Honeywell thermostat displaying 53°F with operational temperature adjustment controls and proper system mode options (Cool/Off/Heat). No irregularities detected in thermostat operation during service visit.
Performed routine maintenance tune-up on residential HVAC system, including inspection of furnace blower assembly, motor, and electrical connections. Examined gas piping system for proper installation and signs of corrosion. Cleaned accessible components and verified proper drainage through PVC condensate line.
Conducted inspection of existing gas line system in unfinished basement area. Evaluated ductwork mounting, support straps, and connection points. Assessed plumbing components including copper pipe configuration, PVC drainage, and PEX tubing installation. Documentation completed with photos showing current system layout for future reference.
Performed inspection and maintenance on basement furnace system with access panel open to examine internal components including wiring and control systems. Checked Aprilaire humidity control device which displayed 28% humidity reading on digital display, and verified proper operation of adjustment controls and indicator lights.
Successfully installed a complete HVAC system including a Goodman furnace with proper sheet metal ductwork connections in the utility room. System installation included mounting the digital thermostat control panel on the main living area wall and verifying all components were operational after installation.
Performed scheduled prepaid maintenance on HVAC system. Inspected electrical components and wiring connections throughout the furnace, ensuring proper connection of control board wiring and blower motor assembly. Verified all wire harnesses were secure and properly routed to maintain system integrity and operational efficiency.
Conducted comprehensive assessment of existing HVAC system in basement utility area. Evaluated aging furnace unit with connected rectangular galvanized ductwork system. Recommended full system replacement due to visible wear patterns and potential efficiency concerns. Detailed specifications for appropriate replacement equipment that would integrate with existing duct configuration while improving overall system performance.
Conducted inspection and assessment of under-sink plumbing configuration. Installed new PVC drain system with P-trap assembly components and secured all connections with appropriate coupling joints and unions. Connected braided stainless steel supply lines to existing water valves and verified system functionality with no leaks.
Responded to no heat complaint for unit less than 10 years old. Visual inspection revealed properly mounted system with intact connections. Identified and replaced faulty ignition control module which was preventing proper heating cycle initiation. Tested system through multiple heating cycles to confirm proper operation and restored heat to the facility.
Completed installation of an AprilAire humidifier system on existing HVAC unit in basement utility room. Mounted humidifier to side of air handler with proper ductwork connections including winter panel (#35) installation. Verified all electrical connections and ensured proper integration with existing furnace system for optimal indoor air quality control.
Responded to no heat complaint on furnace less than 10 years old. Diagnostic testing revealed a malfunctioning control board as evidenced by the digital display showing "00" codes. Replaced PCB control board (part #R223001ZA E2501), verified proper connections to all wiring harnesses, and confirmed system operation. Heating function restored to normal operation.
Upon arrival, performed diagnostic inspection on furnace unit reporting no heat. Visual inspection of interior components revealed all electrical connections were intact with no signs of damage. After testing system operation, identified and reset tripped safety switch which had interrupted heating cycle. Verified proper ignition sequence and confirmed normal operation through complete heating cycle before closing access panel.
Inspected commercial HVAC system in utility room after no-heat complaint. Observed significant dust accumulation on ventilation ducts and hanging electrical cables requiring attention. Accessed system components using ladder to perform necessary maintenance.
Performed comprehensive tune-up on gas furnace system. Inspected burner assembly confirming proper ignition with clean blue flame pattern. Examined electrical components including wiring connections and circuit board, ensuring all connections were secure and functioning correctly. System is operating within normal parameters after service.
Conducted inspection of existing HVAC equipment through an access panel, revealing outdated unit with visible wiring issues. Provided estimate for complete system replacement, noting the current unit has reached end of service life and replacement would improve energy efficiency while ensuring proper integration with the home's existing doorways and layout.
Performed scheduled tune-up on HVAC system with focus on Aprilaire humidifier unit. Inspected control panel which showed signs of wear with dial positioned between OFF and 15% settings. Examined humidifier housing mounted to ductwork which displayed mineral deposits on top surface. Cleaned accessible components and verified proper connection to main system.
Completed comprehensive IAQ assessment of residential HVAC system featuring Carrier furnace unit. Performed thorough inspection of heating components, ventilation connections, and associated ductwork. Documentation included photographic evidence of current installation configuration to support recommendations for improving indoor air quality.
Performed comprehensive HVAC tune-up service with diagnostic testing of system performance. Measured supply air temperature at register (70.2°F) to verify proper system operation. All components functioning within normal parameters; no issues detected during inspection.
Performed standard prepaid maintenance visit on gas furnace system. Inspected control board connections and verified proper wire terminal connections. Observed burner assembly with normal blue flame pattern indicating proper gas combustion and operation.
Conducted comprehensive tune-up on HVAC system with focus on motor assembly inspection. Examined electrical connections, verifying proper wire terminations and secure fastening of colored wires (blue, red, white, yellow, green) to control module and gas valve. Inspected blower motor for proper operation and mounting integrity. Checked gas valve functionality and verified control module operation with attention to switch positions. All components were found to be in serviceable condition with no signs of deterioration or damage.