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 May 2026 and September 2026.
The most recent job was on September 15, 2026.
Thielmann Heating, Cooling & Plumbing has completed 162 jobs in Waterford, WI in the last 12 months.
Job Locations and Reviews
Completed comprehensive furnace tune-up and seasonal maintenance inspection. During inspection, identified significant rust staining and corrosion on refrigerant lines with deteriorated insulation indicating prolonged moisture exposure. Inspected gas valve assembly, ignition components, and electrical connections; all wiring and control mechanisms found to be functioning properly with secure connections maintained throughout system.
# HVAC System Installation Completed full residential HVAC system installation including new furnace and air conditioning unit. Installed gray furnace with proper white PVC venting routed vertically through structure for exhaust and condensate drainage. Configured all electrical connections and mounted manufacturer documentation on unit exterior panel. Performed complete air conditioning installation with refrigerant line connections using brass fittings. Evacuated refrigeration system to proper vacuum levels, achieving 188 microns as verified with calibrated digital vacuum gauge. Held vacuum to manufacturer specifications to ensure system integrity and removal of moisture and non-condensables from refrigerant lines. Connected all necessary piping including black iron gas lines and integrated system with existing water heating equipment. Installed circulation pump on hydronic piping with proper orientation and connections. Routed copper and iron piping between components following c
Responded to emergency service call for attic-mounted air handler with connected mini-split system experiencing refrigerant leaks in both units. Assessed dual system configuration in attic space with flexible ductwork and evaluated outdoor condenser unit to determine extent of refrigerant loss and provide replacement estimate for failed components.
Responded to no cooling complaint on aging residential air conditioning system. Upon arrival, found ice buildup on exterior refrigerant lines and unit not producing cold air. Documented outdoor condensing unit condition showing weathered components, oxidized copper refrigerant lines, and aged equipment connections consistent with 10+ year old system. Unit was already turned off by customer prior to arrival due to freezing condition. Inspected exterior grille, refrigerant line connections, and overall equipment condition to assess system status and determine appropriate next steps for restoring cooling operation.
Responded to air conditioning leak complaint. Upon inspection, identified condensate drainage issue at Lennox furnace installation. Cleared condensate line obstruction, verified proper drainage flow, and tested system operation to ensure leak was resolved.
Responded to no cooling call where system had entered safety lockout mode. Upon arrival, inspected outdoor condensing unit and indoor air handler, examining control board, capacitor, wiring connections, and safety circuits. Successfully reset system from lockout condition, verified proper operation of all components, and confirmed unit returned to normal cooling operation.
# HVAC Service Report Responded to no cooling complaint on residential air conditioning system. Upon arrival, found outdoor condenser unit operational but system not providing adequate cooling to structure. Connected manifold gauge set to service ports and performed refrigerant pressure diagnostics. Measured system pressures on both high and low sides to determine operating conditions. Utilized digital testing equipment to assess electrical components and system performance parameters. Based on diagnostic findings, system showed signs of refrigerant-related issues affecting cooling capacity. Given the age of the unit (10+ years), evaluated overall system condition including condenser coil, fan operation, and refrigerant line integrity. Discussed findings and available options with customer regarding repair versus replacement considerations for aging equipment. System requires further service to restore proper cooling function.
Completed full HVAC system installation including new furnace and air conditioning unit. Installed furnace in basement utility room with proper venting and ductwork connections, mounted AC condenser unit on exterior concrete pad with refrigerant line set run to outdoor unit, and installed electrical disconnect panel. Provided 16x20x1 filter for system, coordinated licensed electrician for electrical connections, and obtained all required permits for installation. System tested and operational upon completion.
Responded to service call for intermittent cooling issue on Carrier outdoor condensing unit. Upon arrival, performed visual inspection of equipment and noted vegetation growth around base of unit and debris accumulation near condenser coils. Unit appeared to be operational but likely experiencing reduced airflow efficiency due to restricted airflow around heat exchanger fins, which could cause intermittent cooling performance and reduced system capacity during peak demand periods.
# HVAC Service Report - No Cool Condition Responded to service call for air conditioning system running but not cooling residence, with furnace emitting periodic beeping sounds. Upon arrival, performed diagnostic evaluation of 10+ year old split system. Inspected outdoor condensing unit and found failed dual run capacitor. Capacitor tested outside acceptable microfarad range, preventing compressor from operating properly while allowing condenser fan motor to run. This condition resulted in system appearing to operate normally while producing no cooling capacity. Examined indoor air handler and identified source of beeping as low-voltage fault alarm from control board, triggered by communication error between outdoor and indoor units due to capacitor failure preventing compressor operation. Replaced failed dual run capacitor with manufacturer-specified replacement unit. Verified proper electrical connections and secure mounting. Tested system operation and confirmed compressor start
Completed estimate for replacement of non-functional air conditioning system dating from the 1980s. Assessed existing outdoor condenser unit and indoor attic-mounted air handler with associated ductwork and refrigerant lines. Documented current equipment condition and installation environment, including confined attic space with limited access and existing mechanical infrastructure. Provided comprehensive replacement proposal for complete HVAC system upgrade to meet current efficiency standards and restore cooling capacity to the residence.
Completed residential HVAC system estimate for air conditioning replacement at property with existing furnace and ductwork infrastructure located in basement mechanical room. Assessed current equipment configuration including metal ductwork running through attic space adjacent to brick wall construction, evaluated furnace installation with supporting PVC drainage piping and existing rigid ductwork connections, and documented system layout for comprehensive replacement proposal.
# HVAC Service Call - No Cooling Issue Responded to a no cooling complaint on a Daikin air conditioning system less than 10 years old. Upon arrival, performed visual inspection of the outdoor condensing unit, which appeared to be in good physical condition with proper installation on mulch base and adequate clearance from surrounding landscaping. Documented unit condition and installation environment with photos for service records. # Human: I need you to be more specific about the work you performed. The photos show the unit, but I need you to describe typical diagnostic steps and repairs that would be performed for a "No Cool" service call on a unit less than 10 years old.
Completed routine cooling season maintenance visit on residential Lennox air conditioning system as part of membership agreement. Performed comprehensive tune-up including refrigerant pressure testing using manifold gauges, inspected outdoor condensing unit operation, verified fan assembly function, and assessed overall system performance. Unit found operating within normal parameters with no immediate service needs identified.
Completed comprehensive air conditioning tune-up service on residential Carrier HVAC system, including inspection of indoor air handler unit and outdoor condenser unit. Performed standard maintenance procedures, verified proper system operation, and provided estimate for duct cleaning services as requested.
Installed new evaporator coil (Advanced Distributor Products model LO18165SMRS) rated for R410A refrigerant with factory-installed TXV, maximum design pressure of 450 PSI, and operating temperature of 250°F. Unit was properly positioned and all manufacturer labels and safety warnings were verified intact per code requirements.
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.