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 January 2026 and March 2026.
The most recent job was on March 24, 2026.
Thielmann Heating, Cooling & Plumbing has completed 162 jobs in Waterford, WI in the last 12 months.
Job Locations and Reviews
# HVAC Install - Boiler Completed comprehensive boiler installation in mechanical room including full integration with existing plumbing infrastructure. Installed new boiler system with extensive copper piping network featuring multiple diameter runs for supply and return lines, ensuring proper water circulation throughout the heating system. Configured all necessary connections to water heater, expansion tank, and distribution manifolds with professional soldered joints and appropriate isolation valves for future serviceability.
# Plumbing Service - Broken/Burst Pipe Responded to emergency call for burst pipe repair in residential property. Upon arrival, assessed water damage and located compromised copper supply line behind bathroom wall. Shut off main water supply to prevent further flooding and property damage. Removed section of damaged drywall to access plumbing system. Found corroded copper pipe with pinhole leak that had expanded due to water pressure, causing significant water discharge into wall cavity and bathroom area. Extracted affected pipe section and inspected surrounding plumbing infrastructure for additional compromise. Installed new copper pipe segment using compression fittings and proper soldering techniques to ensure watertight seal. Verified all connections met code requirements and tested system integrity under full water pressure. Confirmed no additional leaks present at joints or surrounding plumbing fixtures including tub spout and shower assembly. Restored water supply and conduc
# HVAC Service Report - No Heat Call Responded to no heat call on residential forced air system. Upon arrival, performed diagnostic evaluation of air handling unit and associated components. Inspected burner assembly, heat exchanger, and ignition system for proper operation. Verified gas supply pressure and electrical connections to unit. Checked thermostat communication and system controls. Found primary issue with flame sensor requiring cleaning due to carbon buildup preventing proper flame detection. Removed and cleaned sensor rod, restoring conductivity for flame sense circuit. Tested ignition sequence and confirmed proper burner operation through multiple heating cycles. Verified proper draft through heat exchanger and venting system. Inspected blower motor operation and amperage draw, confirming within manufacturer specifications. Checked air filter condition and advised replacement due to restriction. Evaluated humidifier operation and water supply connections, noting proper
Completed installation of exterior ventilation duct with proper sealing and mounting to vinyl siding. Verified airflow functionality and inspected connection points to ensure secure attachment and weather-resistant seal around perimeter.
Performed diagnostic inspection on residential boiler system, including thorough examination of heat exchanger, pump assembly, and electrical connections. Removed front access panel to evaluate control panel functionality and inspect copper piping connections for leaks or corrosion. System was reassembled and tested for proper operation after all components were verified to be in working condition.
Diagnosed and serviced HVAC system experiencing no-heat condition. Performed comprehensive inspection of blower motor assembly and electrical components, including verification of all wire connections (yellow, blue, green, white, and red) to ensure proper functionality. Restored heating operation by repairing faulty wiring connections at the circuit board and confirming normal system operation before completion.
Performed inspection of existing boiler system and electrical panel. Documented current installation showing aging cylindrical water heater/boiler with conical top section connected to complex copper piping network in basement utility area. Electrical service panel appears in good working condition with proper labeling. Noted sump pump system with red motor component installed nearby. Photographs taken of all components to support comprehensive estimate for recommended system upgrades.
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.