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
Responded to no-cool call on aging residential air conditioning system. Upon arrival, found unit running continuously without cycling off. Connected manifold gauges and performed system diagnostics on outdoor condenser unit. Checked refrigerant pressures, evaluated compressor operation, and inspected condenser coil condition. Coil showed accumulation of dirt and debris affecting heat transfer efficiency. Assessed thermostat communication and control circuit functionality to determine cause of continuous operation. Completed system evaluation and provided customer with findings and repair recommendations for proper system cycling and cooling performance.
Installed 75-gallon residential water heater in basement utility area. Connected all supply and discharge plumbing lines with copper piping and appropriate brass fittings, installed expansion tank, and routed metallic vent pipe through floor joists to ensure proper exhaust ventilation. Unit tested and operational upon completion.
Responded to no cooling complaint on aging outdoor condensing unit. Upon arrival, connected manifold gauges to service ports and diagnosed system with low refrigerant charge due to leak. Unit showed significant weathering and biological growth consistent with age and outdoor exposure. Performed refrigerant recovery, leak detection, and system recharge to restore cooling operation.
Responded to no cooling complaint on Lennox outdoor condensing unit. Performed system diagnostics and inspected for refrigerant leaks using previously installed UV dye from last year's service. Completed tune-up procedures including electrical testing, component inspection, and verified system operation.
Performed comprehensive air conditioning tune-up on Carrier condensing unit, including system diagnostics with Yellow Jacket Titan 4-valve manifold gauges to verify refrigerant pressures and charge levels. Connected refrigerant hoses to service ports, tested electrical components with digital meter at disconnect box, and confirmed proper system operation and performance within manufacturer specifications.
Returned to property to properly reposition outdoor condenser unit on pad. Verified unit orientation and confirmed all manufacturer labels and stickers on condenser remained visible and uncovered during installation process. Unit now correctly positioned on concrete pad with proper clearances maintained for airflow and service access.
Responded to no cooling call where outdoor condensing unit was not receiving power. Diagnosed electrical issue preventing unit operation. Restored power to outdoor unit, verified proper startup sequence, and confirmed system returned to normal cooling operation with both indoor air handler and outdoor condenser functioning correctly.
Responded to service call for leaking outdoor hose bib. Upon inspection, confirmed the exterior spigot mounted on the building's foundation was compromised due to internal rust buildup causing water seepage. Accessed the supply line from the interior crawl space and installed a new quarter-turn ball valve with red handle for improved shut-off control. Replaced the exterior hose bib with new chrome fixture, ensuring proper seal against the vinyl siding to prevent future leaks.
Responded to no cooling complaint on residential air conditioning system. Upon arrival, found outdoor condenser unit with significant debris accumulation in and around equipment, restricting airflow to coil. Performed diagnostic evaluation and cleared accumulated leaves, twigs, and organic matter from unit perimeter and between equipment and deck structure. Inspected refrigerant lines, electrical connections, and condenser operation. Unit restored to proper cooling operation after removing airflow restrictions and verifying system performance.
Responded to no cooling complaint on residential split system air conditioning unit. Upon arrival, found outdoor condenser unit running with fan motor operational but system not producing cold air. Performed diagnostic inspection of condenser components through top access panel, verified fan motor operation and checked for proper compressor function. Unit remains under parts and labor warranty coverage.
Completed air conditioning tune-up on residential Lennox HVAC system. Performed standard maintenance inspection, tested system pressures using manifold gauges, verified proper refrigerant levels, and documented equipment condition with photos.
# Complete HVAC System Installation Successfully completed a full residential HVAC system replacement including new furnace, air conditioning unit, water heater, and F100 filter cabinet. Removed existing equipment and installed all new components per manufacturer specifications and local building codes. Coordinated with licensed electrician to ensure proper electrical connections and power supply for all equipment. ## Equipment Installation Installed new high-efficiency furnace in existing location with proper clearances and venting. Connected new furnace to existing ductwork system after inspection and verification of proper airflow paths. Mounted new F100 filter cabinet to provide enhanced air filtration for the complete system. Positioned new outdoor condensing unit on level surface with appropriate clearances from building structure and landscaping. Connected refrigerant lines using copper piping with proper insulation and brass fittings. Evacuated refrigerant lines and charged
Completed installation of Infinity brand air conditioning system with matching evaporator coil in residential basement location. New AC unit and coil were properly positioned, connected to existing ductwork via galvanized metal plenum, and integrated with condensate drainage system using white PVC piping. All electrical connections, refrigerant lines, and ductwork transitions were secured and tested to ensure proper system operation and compliance with manufacturer specifications.
Completed comprehensive tune-up on Infinity furnace system as part of recent AC installation package. Performed standard maintenance protocol including air filter replacement, system diagnostics with digital measurement tools showing operational reading of 33.3, and thorough inspection of internal components including copper refrigerant lines and electrical connections to ensure optimal performance and efficiency.
Performed air conditioning system startup on new installation. Verified all condensate valves were open and operational across zones 1-4. Utilized digital thermocouple thermometer and manifold gauge set to measure system temperatures and refrigerant pressures, confirming proper charge levels and system readiness. All equipment tested and verified ready for operation.
Completed prepaid maintenance visit on residential cooling system. Performed comprehensive system diagnostics using manifold gauges to verify refrigerant pressures and overall system performance. Unit operating within normal parameters with all components functioning properly at time of inspection.
Performed comprehensive tune-up on Carrier air conditioning system. Connected manifold gauges to verify refrigerant pressures and system performance, confirmed proper operating pressures on both high and low sides. Applied coil cleaner to condenser unit and cleaned exterior fins to restore optimal heat transfer efficiency and airflow.
Completed return visit to install face plate on supply plenum. Secured and mounted face plate assembly to vertical duct section in mechanical room, ensuring proper seal and professional appearance. Installation verified and system confirmed operational.
Responded to call for leaking hose bib at exterior wall junction. Upon inspection, identified active leak at outdoor spigot connection causing rust staining on white wood siding. Accessed shut-off valve from interior crawl space through attic access point. Installed new gate valve with blue handle on copper supply line to provide isolation capability for future maintenance. Tested system for proper operation and verified leak resolution at exterior hose bib connection point.
Responded to service call for water softener evaluation after unit displayed error message following 24-hour operation cycle. Upon inspection, identified existing water treatment system as over 20 years old with outdated control panel and digital display. Documented current installation configuration including copper supply line connections with brass compression fittings, red-handled shut-off valve, and PVC drain line. Assessed unit positioning in basement utility area near brick wall structure and concrete floor. Photographed existing equipment setup, plumbing connections, electrical supply with power cord to wall outlet, and overall system layout. Provided estimate for complete water softener replacement due to age of existing equipment and operational failure.