
Your home deserves the best care when it comes to comfort, safety, and performance. Thielmann Heating, Cooling, and Plumbing is proud to serve Grafton with a full suite of professional services. Our team is dedicated to providing reliable and efficient solutions tailored to your unique needs, ensuring your home operates smoothly in every season. If you need a home service company you can trust, give Theilmann a call at (262) 315-3067 or contact our team online.
Comprehensive Plumbing Services in Grafton
A well-functioning plumbing system is crucial for your home’s comfort and hygiene. We offer a wide range of plumbing services designed to keep your home’s water system flowing, including:
- Water Heater Services: Whether you need installation, repair, or maintenance, we handle both tank and tankless water heaters to keep your hot water flowing. Our Grafton plumbers can help you choose the most energy-efficient option for your household’s needs.
- Pipe Repairs and Leak Detection: Protect your home from water damage with our efficient pipe repairs and state-of-the-art leak detection services. We locate hidden leaks quickly, preventing structural damage and reducing water waste.
- Fixture Installations: Upgrade your kitchen or bathroom with new faucets, sinks, and garbage disposals installed by our skilled technicians. Whether you’re remodeling or simply replacing outdated fixtures, we ensure proper installation for lasting performance.
- Sump Pump Solutions: Avoid basement flooding with our reliable sump pump installations and repairs. We also offer backup pump options to provide peace of mind during heavy rains or power outages.
- Water Quality Systems: Enjoy cleaner, better-tasting water with our advanced filtration and softening systems tailored to your needs. Our solutions address common water issues like hard water, sediment, and contaminants, ensuring safer water for your family.
Grafton Cooling Services to Beat the Summer Heat
When summer arrives in Grafton, maintaining a cool and refreshing home is essential. With our dependable air conditioning solutions, you can beat the heat and enjoy a comfortable indoor environment all season long.
- AC Installation and Replacement: We install energy-efficient air conditioning systems from top brands, tailored to your home’s size and needs. Our team helps you select the perfect system for optimal cooling and cost savings.
- Air Conditioning Repairs: Our Grafton HVAC technicians quickly diagnose and repair issues to restore your system’s functionality. From refrigerant leaks to malfunctioning compressors, we’ve got you covered.
- Ductless Systems: Enjoy personalized comfort with ductless mini-split systems ideal for zoning and additions. These systems are perfect for areas where traditional ductwork isn’t feasible.
- Thermostat Upgrades: Improve energy efficiency with smart or programmable thermostats that let you control your system remotely. Smart thermostats also provide insights into your energy usage, helping you reduce costs.
- Air Quality Solutions: Enhance your indoor environment with dehumidifiers and air purifiers to reduce allergens and improve comfort. Proper humidity control also helps prevent mold growth and protects your home’s structure.
Heating Services You Can Trust

The harsh winters in Southeastern Wisconsin require heating systems that you can trust. At Thielmann Heating, Cooling, and Plumbing, we specialize in providing tailored solutions to ensure your Grafton home remains warm, comfortable, and safe throughout the season:
Furnace Services
From installation to repairs and maintenance, we ensure your furnace operates as it’s designed to. Regular tune-ups help avoid unexpected breakdowns during the coldest months.
Boiler Installation and Repair
Boilers are excellent for consistent and energy-efficient heating. We specialize in servicing both traditional and modern systems, ensuring reliable performance all winter long.
Heat Pump Solutions
Enjoy year-round comfort with heat pumps that provide both heating and cooling. Our technicians optimize system performance for maximum efficiency and durability.
Routine Maintenance
Regular tune-ups prolong the life of your system and prevent costly breakdowns. Our maintenance plans are designed to keep your system running smoothly and efficiently.
Why Southeastern Wisconsin Chooses Thielmann
Thielmann Heating, Cooling, and Plumbing has earned the trust of our customers through our unwavering commitment to quality and customer satisfaction. Here’s why we’re the preferred choice:
- Decades of Experience: Our seasoned technicians bring a wealth of knowledge to every service call, ensuring top-notch results.
- Customer-First Approach: Your satisfaction is our priority, and we go above and beyond to exceed your expectations. From transparent communication to attentive service, we make your experience seamless.
- Transparent Pricing: We believe in honest, upfront pricing with no hidden fees. You’ll know exactly what to expect before we begin any work.
- Eco-Friendly Options: We offer sustainable solutions to help reduce your home’s environmental footprint while saving on energy costs. From high-efficiency HVAC systems to water-saving plumbing installations, we help you make greener choices.
- Cutting-Edge Technology: We stay ahead of the curve with advanced tools and techniques to provide efficient and effective service. Our commitment to innovation ensures the best outcomes for your home.
Schedule Your Service in Grafton Today
Don’t let home service issues disrupt your life. Thielmann Heating, Cooling, and Plumbing is here to provide the expert care you need. Call us today at (262) 315-3067 or contact us online to schedule your service. Experience the difference of working with Grafton’s trusted home service provider.
Recent Jobs and Reviews in Grafton, WI
Grafton, WI at a glance
Thielmann Heating, Cooling & Plumbing has completed 20 jobs in Grafton, WI between September 2026 and October 2026.
The most recent job was on October 20, 2026.
Thielmann Heating, Cooling & Plumbing has completed 79 jobs in Grafton, WI in the last 12 months.
Job Locations and Reviews
Performed a replacement estimate evaluation of the existing 36-year-old natural gas furnace located in the basement and the 19-year-old outdoor air conditioning condenser. The condenser exhibited heavily soiled, discolored coil surfaces with rust along the cabinet base and grate, and was surrounded by overgrown vegetation and debris restricting airflow. The condensate pump in the basement showed a corroded copper line at its inlet fitting, along with visible dust and debris buildup, and both systems were documented as candidates for replacement due to age and condition.
Repaired the water main by replacing approximately 20 feet of copper supply piping, with the water supply shut off for the duration of the work. The new copper run was secured to the floor joists with strut brackets and clamps, and the system was left properly supported and ready for service.
Performed an on-site evaluation of the existing split-system air conditioning installation for a replacement estimate following a failed contactor. Inspected the indoor air handler, refrigerant line set, condensate drainage, and control components in a confined utility closet, and noted heavy staining and moisture residue around the condensate drain piping and secondary drain/safety switch area that should be addressed during replacement. Documented equipment data labels and installation conditions to determine replacement options and scope.
Installed a complete HVAC system conversion from oil to gas, including a new furnace, Lennox condenser, PVC venting and condensate drain piping, and filter cabinet. The outdoor condenser was set on a level pad and connected to the refrigerant lines, with the system charged using refrigerant. Permitted work was completed with licensed electrical connections and a disconnect installed at the unit, and the gas service is pending utility activation.
Performed a complete tune-up on the gas-fired boiler, including inspection and cleaning of the burner compartment, burners, and orifices to remove soot and heat staining. Inspected the pilot assembly, igniter/flame sensor, gas fittings, and wiring connections for proper condition and secure fastening, and verified safe, normal operation of the unit upon completion.
Performed a seasonal furnace tune-up, accessing the burner compartment and control cabinet to inspect the burner assembly, control board, transformer, relays, and low-voltage thermostat terminal connections (W, C, Y, G, HUM) for secure termination and proper wire routing. Verified wiring harness integrity and cleaned accumulated dust and debris from the cabinet interior, then reinstalled the access panel and confirmed the unit was ready for operation.
Completed installation of Alpha-1 sump pump replacement system in basement utility area. Installed new sump pump unit with yellow float switch assembly in existing concrete basin, connected discharge piping using white PVC with proper joints and fittings, and configured electrical controls and power connections to ensure proper pump operation and automatic water level management.
Completed mid-efficiency boiler tune-up and seasonal maintenance inspection. During the inspection, documented severely corroded suspension springs showing extensive rust and oxidation damage that will require monitoring or replacement to prevent system failure. Unit is currently operational following standard tune-up procedures.
Completed scheduled heating system maintenance and tune-up as part of recurring membership agreement. Performed comprehensive furnace inspection, verified thermostat operation showing proper 72-degree setpoint and schedule programming, and conducted electrical diagnostics measuring 0.5 amp current draw to confirm safe system operation.
Completed estimate for replacement of existing gas furnace located in basement mechanical room. Assessed current HVAC system including gray metal furnace unit with return air grille and associated ductwork, as well as existing Honeywell digital thermostat. Provided replacement options and recommendations for new equipment installation.
Provided estimate for rerouting water heater venting system from existing chimney configuration to exterior wall termination. Assessed current AO Smith water heater installation and evaluated venting requirements for compliance with manufacturer specifications and local codes. Recommended exterior wall venting solution to improve draft efficiency and eliminate chimney dependency.
Responded to a supply line gate valve leak in the utility area. Inspected the plumbing assembly featuring copper piping and gate valves mounted on the wall, identified the source of the leak, and completed necessary repairs to restore proper function and eliminate water seepage. System was tested and confirmed operational upon completion.
Conducted on-site assessment of existing oil-fired furnace system in basement mechanical room to provide estimate for conversion to gas-fired heating system. Evaluated current ductwork configuration, including existing metal supply and return plenums, and documented equipment layout and available space for new gas furnace installation. Confirmed gas line is already run to the location, simplifying the conversion process. Photographed existing HVAC equipment, ductwork connections, and mechanical room layout to prepare accurate replacement estimate and verify compatibility with new gas furnace specifications.
Responded to emergency service call for furnace system evaluation. Upon inspection, found existing Goodman furnace unit in basement mechanical room required red-tagging due to safety concerns. Completed comprehensive assessment of HVAC system including ductwork, ventilation components, and auxiliary equipment. Provided detailed replacement estimate for new furnace installation. Coordinated installation scheduling to accommodate customer's extended absence, arranging access through local family members for completion during two-month travel period with confirmed two to four-hour arrival window and advance notification protocol.
Completed full tune-up maintenance on HVAC system including inspection of control board, wiring harness connections, and reversing valve assembly. Verified all electrical connections secure, checked refrigerant circuit components for proper operation, and documented system condition with interior cabinet photography showing copper reversing valve solenoids and control board in good working order.
Completed inspection and estimate for outdoor spigot replacement. Assessed existing copper plumbing infrastructure in crawl space, including vertical supply line connections, pipe insulation condition, and access points to exterior hose bib. Documented current installation configuration with black insulated joints and provided recommendations for replacement work.
# Sump Pump Inspection Performed comprehensive pre-winter sump pump inspection on an 8-year-old system. Documented existing conditions of submersible pump assembly, discharge piping, and basin components. Inspection revealed significant corrosion and rust deterioration on copper discharge pipes, with surface oxidation evident throughout the piping system. Verified pump housing integrity, float switch operation, and proper water level in concrete basin. Photographed all components including deteriorated pipe surfaces, pump assembly with circular cover plate and mounting bolts, flexible discharge hose, and basin conditions to document current system status prior to winter season.
Responded to service call regarding attic ventilation fans creating excessive negative pressure in the home, resulting in dangerous downdraft conditions on the water heater flue. Assessed ventilation system and combustion appliance venting to identify pressure imbalance issues that could lead to backdrafting of combustion gases into the living space.
Completed estimate for sump pump replacement with battery backup system installation. Assessed existing sump pump unit showing signs of wear and operational degradation, documented current setup including pump housing, discharge piping configuration, and sump basin condition. Evaluated workspace accessibility and determined requirements for upgraded system with integrated battery backup to ensure continuous operation during power outages. Photographed existing equipment and basin opening to document pre-replacement conditions and provide specifications for replacement unit sizing and installation planning.
Responded to callback for disconnecting drain hose on recent installation. Upon inspection, found condensate drain line was insufficient length causing repeated disconnection at fitting. Replaced drain hose with properly sized tubing, secured all connections, and verified proper drainage flow with no leaks.