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
Waterford, WI at a glance
Thielmann Heating, Cooling & Plumbing has completed 20 jobs in Waterford, WI between March 2026 and May 2026.
The most recent job was on May 8, 2026.
Thielmann Heating, Cooling & Plumbing has completed 162 jobs in Waterford, WI in the last 12 months.
Job Locations and Reviews
Conducted estimate for replacement of existing water heater installed in 2002. Evaluated current installation including ductwork, plumbing configuration with PEX piping, and available space in mechanical room. Discussed tankless water heater options with customer as alternative to conventional tank-style unit, reviewed installation requirements, venting considerations, and system specifications suitable for the property.
Completed installation of new furnace and humidifier system in residential basement location. Installed gray metal vertical cabinet-style furnace unit with associated ductwork connections, routing large supply and return ducts through exposed ceiling joists. Connected humidifier equipment to system, with PVC condensate drainage piping staged for final connection. All equipment properly positioned on concrete floor, ductwork secured to ceiling structure with appropriate hangers, and system prepared for startup and commissioning.
Completed routine cooling system maintenance visit as part of recurring membership agreement. Performed standard diagnostic checks using manifold gauge set to verify refrigerant pressures and system performance on horizontal air handler unit located in attic space. Inspected equipment operation, condensate drain lines, and ductwork connections to ensure proper system functionality.
Conducted estimate for complete HVAC system replacement in basement installation. Existing furnace (80,000 BTU natural gas unit) is non-operational and requires replacement along with air conditioning system. Assessed current equipment configuration, measured installation area, and documented existing ductwork layout including supply and return air pathways. Provided estimate for new furnace and AC system with promotional offer including complimentary water heater replacement. Documented equipment specifications, clearance requirements, and necessary modifications for proper installation.
Completed comprehensive AC tune-up on Carrier system, including indoor furnace and outdoor condenser unit inspection. Performed standard maintenance procedures with refrigerant pressure testing using manifold gauges, electrical component verification, and system operational checks. All equipment found operating within normal parameters with no issues identified during service visit.
Responded to no heat call on a two-zone hydronic boiler system. Upon arrival, found the zones were not operating independently as designed. Performed diagnostic evaluation of the boiler, circulator pumps, zone valves, and associated controls. Inspected gas valve, burner assembly, and all electrical connections within the heating unit. Verified proper operation of expansion tank, air separator, and piping configuration. Tested system controls and thermostats to ensure proper zone isolation and independent operation. Restored heat to the residence and confirmed both zones were functioning correctly before departure.
Conducted on-site assessment for sump pump and battery backup system installation in crawl space area. Evaluated existing sump pump that has been inactive for approximately two decades and documented current mechanical equipment configuration including discharge piping and electrical components for comprehensive estimate preparation.
Completed prepaid membership cooling maintenance visit on residential air conditioning system. Performed standard seasonal inspection of outdoor condenser unit, including visual assessment of cabinet condition and component integrity. Connected manifold gauge set to measure refrigerant pressures and verify system charge levels. Inspected electrical components including run capacitor and associated wiring connections, confirming proper terminal connections and component functionality. All system parameters found operating within normal specifications.
Completed furnace and air conditioning tune-up for new homeowner requesting equipment evaluation. Performed comprehensive inspection of HVAC system including furnace/air handler unit and associated condensate drainage system with PVC piping configuration. All equipment found to be in proper working order with clean installation and adequate drainage lines functioning correctly.
# HVAC No Heat Service Call - Unit 10+ Years Old Responded to no heat call on aging HVAC system. Upon inspection, discovered significant rust staining on pipe insulation and surrounding surfaces, indicating prolonged moisture exposure and potential corrosion of metal components. Documented conditions with photographic evidence showing rust-colored discoloration transferred to insulation materials and adjacent ceiling areas. The extensive oxidation staining suggests active or historical water intrusion affecting system components, which may be contributing to heating system failure. Recommended further investigation of moisture source and evaluation of corroded components to restore proper heating function and prevent additional water damage to the unit.
Conducted comprehensive HVAC system assessment in basement utility area to provide replacement estimate. Evaluated existing Carrier furnace/air handler unit, associated galvanized metal ductwork system, and electrical panel configuration to determine equipment specifications and installation requirements. Documented current system layout including rectangular trunk lines, branch ducts, and insulated duct sections to plan for new equipment integration with existing infrastructure while ensuring proper sizing and compatibility for optimal system performance.
Performed warranty diagnostic service on outdoor air conditioning unit. Connected Yellow Jacket manifold gauges to measure system pressures and verify proper refrigerant charge levels across multiple refrigerant types including R-22, R-404A, and R-410A. System pressures were monitored and recorded using calibrated analog gauges reading up to 800 PSI to ensure unit was operating within manufacturer specifications and warranty compliance standards.
# Sump Pump Inspection and Service Performed comprehensive inspection and service of existing sump pump system installed in basement utility area. Verified proper operation of submersible sump pump unit within circular pit equipped with black plastic liner set into concrete floor. Tested float switch mechanism for appropriate activation and deactivation at correct water levels. Confirmed secure attachment of float assembly to pump body and verified unobstructed movement throughout full range of motion. Inspected white PVC discharge pipe for proper vertical alignment and secure mounting. Verified discharge pipe bracket and clamp assembly maintaining stable positioning. Examined two-piece sump pit cover for proper fit around discharge piping, ensuring adequate access for future maintenance while preventing debris entry into pit. Assessed overall system functionality in conjunction with visible basement mechanical equipment, including pressure tank, water treatment systems, and associa
Conducted comprehensive assessment of existing HVAC system for replacement estimate, including outdoor air conditioning condenser unit and indoor furnace system. Evaluated current 2-ton AC condenser positioned on concrete pad against exterior wall with gray electrical conduit connections and documented condition of unit housing, heat exchange coils, and protective grille assembly. Inspected basement furnace installation including ductwork configuration, metal cabinet construction, refrigerant line routing, and electrical connections. Photographed both indoor and outdoor equipment to document existing system specifications, installation methods, and spatial constraints for replacement planning. Assessed concrete pad condition, electrical service routing along vinyl siding, and clearance requirements around outdoor unit within mulched landscaping area. Reviewed basement mechanical room layout including exposed floor joists, available workspace, and existing duct transitions to determine
Completed full HVAC system replacement in residential basement utility area. Installed new furnace unit with associated vertical ductwork system including metal plenum boxes and galvanized duct sections running floor to ceiling. Configured white PVC condensate drain and venting lines for proper furnace operation. System has been tested and is fully operational.
# HVAC Install - Complete System Completed full HVAC system installation including indoor air handler unit and outdoor condensing unit. Installed new air handler in basement mechanical room with proper plenum connections and ductwork integration. Mounted outdoor condensing unit on exterior pad against building foundation with appropriate clearances. Ran and insulated refrigerant line set between indoor and outdoor units through building envelope. Installed electrical disconnect box at outdoor unit location per code requirements. Performed system startup procedures including refrigerant charging using manifold gauges to verify proper pressures and system operation. Tested all electrical connections, verified proper airflow through supply plenum, and confirmed heating and cooling functionality. System commissioned and operating within manufacturer specifications.
Responded to no cooling complaint on residential air conditioning system. Connected manifold gauge set to outdoor condenser unit and evaluated refrigerant pressures and system performance. Diagnosed cooling issue and performed necessary service procedures to restore proper system operation. System tested and confirmed operating within manufacturer specifications upon completion.
Completed comprehensive HVAC system evaluation in residential basement utility area for full equipment replacement estimate. Assessed existing furnace and air handler configuration, documented current electrical panel capacity and conduit routing, evaluated ductwork connections and plenum mounting, and photographed equipment layout to provide detailed replacement recommendations and specifications for new high-efficiency heating and cooling system installation.
# Outdoor Spigot Installation and Plumbing Rough-In Completed installation of outdoor spigot plumbing system during construction phase, routing new water supply lines through unfinished basement ceiling structure. Installed PVC and PEX piping with proper mounting brackets and clips along exposed floor joists, ensuring secure attachment and appropriate slope for drainage. Coordinated pipe routing with existing electrical conduit and HVAC systems to maintain proper clearances and building code compliance, preparing infrastructure for final connection to exterior hose bib fixture.
Completed scheduled HVAC maintenance inspection on residential system. Performed comprehensive evaluation of furnace and air handler components, including electrical connections, capacitor, and control board functionality. Inspected mounting hardware, wiring connections, and verified proper installation of all components. Documented system condition with photographs showing terminal connections and internal electrical components. All systems operating within normal parameters with no immediate service needs identified.