When it comes to maintaining a comfortable and functional home in Southeastern Wisconsin, Thielmann Heating, Cooling, and Plumbing has been the trusted name since 1929. With decades of experience serving our customers, we’re dedicated to providing top-notch services tailored to the unique needs of Lake Geneva residents. Whether you’re facing a leaky faucet, need a new furnace, or require a complete air conditioning overhaul, we’re here to help. Experience why so many have trusted us by calling (262) 299-6197 or contact us online now to get started.
Expert Lake Geneva Plumbing Services

From minor leaks to major installations, our skilled, local plumbers are ready to tackle any challenge your home throws your way. Here’s what we offer in our Lake Geneva plumbing services:
- Water Heater Services: Whether you need a new water heater installed or an old one repaired, we’ve got you covered. We specialize in both traditional and tankless water heaters.
- Pipe Repairs and Replacements: Leaky or corroded pipes can cause significant damage. Our team of Lake Geneva plumbers quickly resolves issues to protect your home.
- Fixture Installations: Need a new sink, faucet, or toilet? We provide expert installation to upgrade your home’s functionality and style.
Reliable Air Conditioning Services in Lake Geneva
When the summer heat strikes, a reliable air conditioning system is a must. Thielmann Heating, Cooling, and Plumbing offers a full range of cooling services in Lake Geneva to keep your home comfortable:
- AC Installation and Replacement: We’ll help you choose the right air conditioning system for your home, ensuring it is energy-efficient and tailored to your home’s cooling needs.
- Air Conditioning Repairs: Our Lake Geneva HVAC technicians are trained to handle all kinds of AC issues, from refrigerant leaks to malfunctioning compressors.
- Ductless Mini-Split Systems: Ideal for homes without ductwork, these systems provide efficient cooling with minimal disruption.
- Indoor Air Quality Solutions: Enhance your home’s air quality with services like air duct cleaning, dehumidifiers, and advanced filtration systems.
- Routine Maintenance: Regular tune-ups keep your AC system running efficiently and help prevent costly breakdowns.
Heating Services for Lake Geneva Homes
Keeping your home warm during Wisconsin’s chilly winters is crucial. Our comprehensive Lake Geneva heating services ensure that your home stays comfortable and functional no matter how low the temperature drops. Here’s how we can help:
- Furnace Installation and Replacement: Whether you’re upgrading an old unit or installing a furnace for the first time, our team will help you select the right model and ensure a flawless installation.
- Heating System Repairs: From strange noises to insufficient heating, our technicians are equipped to diagnose and fix any issue with your system.
- Boiler Services: We offer installation, maintenance, and repairs for boilers, ensuring reliable heating for your home.
- Heat Pump Solutions: Energy-efficient and versatile, heat pumps are a great option for year-round comfort. We handle installations and repairs to keep your system running smoothly.
- Maintenance Plans: Regular maintenance prolongs the life of your heating system and ensures peak performance. Our maintenance plans are designed for your convenience and peace of mind.
Commercial Services for Businesses in Lake Geneva

In addition to serving homeowners, Thielmann Heating, Cooling, and Plumbing proudly provides expert comfort solutions for businesses in the Lake Geneva area. We understand the unique needs of commercial properties and are committed to helping you maintain a safe, comfortable, and efficient environment for your employees and customers. Our commercial services include:
- Commercial HVAC Installation and Repair: From small offices to large commercial buildings, we design and service HVAC systems to ensure optimal performance and energy efficiency.
- Plumbing Solutions for Businesses: Whether you need new installations, repairs, or routine maintenance, our team can handle everything from commercial-grade water heaters to restroom fixtures.
- Preventative Maintenance Plans: Regular maintenance is essential for commercial systems to minimize downtime and avoid costly repairs. We tailor maintenance plans to suit your business needs.
Why Choose Thielmann Heating, Cooling, and Plumbing?
We understand that your home is your sanctuary, and you deserve services you can trust to give you the peace of mind you deserve. Here’s why Lake Geneva residents can rely on Thielmann Heating, Cooling, and Plumbing:
- Experienced Professionals: Our technicians are highly trained, licensed, and dedicated to excellence.
- Customer-Centered Approach: We prioritize your needs and ensure clear communication every step of the way.
- Comprehensive Services: From HVAC and plumbing to electrical work, we’re your one-stop shop for home services.
- Satisfaction Guarantee: Your satisfaction is our top priority, and we stand by the quality of our work.
Contact Us Today
Ready to experience the Thielmann Heating, Cooling, and Plumbing difference? Whether you’re planning a new installation, need a repair, or just want to learn more about our services, we’re here to help. Contact us today to schedule an appointment or request a free estimate by calling (262) 299-6197.
Let Thielmann Heating, Cooling, and Plumbing be your partner in keeping your Lake Geneva home or business safe, comfortable, and efficient year-round.
Recent Jobs and Reviews in Lake Geneva, WI
Job Locations and Reviews
Completed installation of new air conditioning condenser unit and evaporator coil at residential property. Installed outdoor condensing unit on concrete pad with proper clearances, ran and insulated refrigerant line set along exterior wall, connected electrical components, and charged system with refrigerant to manufacturer specifications. System tested and verified operational with proper airflow and cooling performance.
Performed routine HVAC maintenance agreement service on residential air conditioning system. Conducted comprehensive system evaluation using manifold gauge set to measure refrigerant pressures and verify proper system operation. Accessed condensing unit electrical components to inspect wiring connections, contactors, and capacitors for signs of wear or damage. All refrigerant levels were within manufacturer specifications, and electrical connections were found secure with no service issues identified. System is operating efficiently and ready for continued seasonal use.
Completed warranty inspection and sound level verification of recently installed HVAC system. Conducted outdoor unit decibel testing using calibrated sound measurement equipment, recording operational noise at 70.7 dBA, which falls within acceptable manufacturer specifications and local noise ordinance requirements for residential installations.
Completed system start-up for newly installed HVAC equipment. Connected manifold gauge set to condenser unit and verified refrigerant pressures across the system, with readings showing proper charge levels on both low-side (blue gauge) and high-side (red gauge) indicators. Measured ambient and system temperatures using digital thermometer, recording 77.1°F to establish baseline operating conditions. All gauges indicated normal operating parameters, confirming successful installation and proper system function upon initial start-up.
# Outdoor Spigot Pipe Replacement Replaced severely corroded copper pipe serving outdoor spigot system. The existing pipe had failed due to extensive corrosion and perforation, causing water leakage. Removed damaged section with corroded brass fittings and installed new copper piping with proper connections to existing basement plumbing infrastructure. Installed shut-off valve for future maintenance access. System tested and confirmed operational with no leaks.
Completed prepaid HVAC maintenance visit on residential heating and cooling system. Performed comprehensive inspection of furnace unit with access panel removed, verifying proper operation of blower motor assembly, examining electrical connections and wiring integrity throughout the system, and checking heating elements and sensors for proper function. Inspected control board and diagnostic panel mounted on exterior cabinet for any error codes or operational issues. Evaluated condensate pump system operation, confirming green indicator light showed active status and proper electrical supply. Examined copper refrigerant line connections running to condensate pump, verifying secure fittings and absence of refrigerant leaks. Noted minor water staining on concrete floor around pump base consistent with normal condensate drainage patterns. All components found operating within normal parameters with no immediate service concerns identified during this scheduled maintenance inspection.
Conducted comprehensive assessment of existing HVAC system for equipment replacement estimate. Inspected current mechanical infrastructure including copper supply lines, shut-off valves, and pipe insulation condition in utility area. Documented plumbing connections, pressure relief components, and existing pipe routing configuration to determine compatibility requirements for new system installation. Evaluated structural access points and clearances necessary for equipment removal and replacement, noting concrete floor conditions and available workspace in mechanical room for staging and installation activities.
Responded to emergency call for burst pipe in interior wall cavity. Upon inspection, discovered compromised 1-1/2" PVC Schedule 40 drain line with failed connections and significant water damage to surrounding structural components. Removed damaged sections of pipe and corroded metal reinforcement brackets that had deteriorated due to prolonged moisture exposure. Installed new PVC piping with proper rubber coupling clamps to ensure secure, leak-free connections between pipe sections. Verified all joints were properly seated and tightened to manufacturer specifications. Tested repaired line for leaks and confirmed proper drainage flow. Addressed water damage concerns and documented condition of surrounding wooden framing members for potential follow-up structural assessment.
Completed comprehensive HVAC maintenance inspection on air handler unit, examining all internal components including blower motor assembly, electrical connections, and control board. Documented system condition with detailed photography showing proper wire routing, functional copper refrigerant lines, and operational control board with all connections secure and within manufacturer specifications.
Completed installation of a standard two-piece porcelain toilet in bathroom corner with proper mounting and connection to existing plumbing system. Ensured proper water supply connection and verified leak-free operation after installation. Work area was left clean with all tools and materials removed from the premises.
Performed comprehensive HVAC system tune-up including internal component inspection and combustion analysis. Diagnostic testing with Testo 310 gas analyzer confirmed 96.1% efficiency with acceptable CO levels (11 ppm) and proper oxygen/CO2 balance. System is operating within manufacturer specifications with all electrical connections and mechanical components verified functional.
Diagnosed and repaired furnace with no heat issue. Inspection revealed damaged heat exchanger with corrosion and cracked burner tubes, along with disorganized wiring causing intermittent electrical problems. Replaced heat exchanger assembly, rewired electrical connections to factory specifications, and performed complete system test to verify proper operation.
Conducted inspection of existing outdoor heat pump unit showing signs of age and wear, operating in snowy conditions. Examined electrical connections at the circuit breaker panel, noting current wiring configuration and load capacity. Prepared estimate for complete system replacement to improve efficiency and reliability.
Diagnosed and serviced an aging furnace (10+ years) that was not producing heat. Inspection revealed significant dust accumulation throughout the system with particular concentration on the blower motor assembly and circuit board. Cleaned critical components, replaced worn electrical connections, and performed system reset which restored proper heating function. Unit is operational but showing signs of age-related wear that may require more extensive service in the near future.
Successfully installed a complete residential HVAC system in the utility closet, featuring a new gray furnace unit with an Aprilaire humidifier attachment. Installation included proper mounting of the furnace on concrete flooring, comprehensive ductwork installation with both metal and insulated sections secured with metallic tape, and complete electrical connections to ensure optimal system functionality.
Performed scheduled HVAC tune-up service with comprehensive system inspection. Measured static pressure reading of 13.5" using UEI digital manometer on ductwork to verify proper airflow through system. All components functioning within normal parameters at time of service.
Conducted inspection of furnace heat exchanger, revealing significant dirt, dust, and possible mold accumulation on the evaporator coils. Performed comprehensive cleaning of the coil fins to remove buildup that was restricting airflow and reducing system efficiency. Recommend regular maintenance to prevent future accumulation and maintain optimal system performance.
Responded to no-heat service call for Daikin heat pump system. Performed diagnostics on outdoor unit, discovering failed defrost board causing system malfunction. Replaced defrost control module and verified proper system operation through complete heating cycle test. System now functioning normally with restored heating capability.
Responded to service call regarding plumbing system issue. Inspected and verified proper installation of PVC piping system including T-junctions and elbow fittings in confined space. Confirmed all connections were secure with no leaks present.
Completed installation of a Bosch HVAC system in residential basement setting, including furnace unit with proper gas line connection and ventilation. System features integrated ductwork with both round and rectangular sections, and all electrical components were properly wired and tested for optimal performance. Installation meets all safety requirements with appropriate floor drainage system in place.