For over 90 years, Thielmann Heating, Cooling, and Plumbing has been the go-to provider for dependable home solutions in the Southeastern Wisconsin area. Our team combines expertise and personalized care to ensure your living or working spaces are efficient, secure, and comfortable. Whether it’s installing West Allis HVAC systems or addressing plumbing challenges, we’re committed to delivering seamless, high-quality service every time. For superior home services, call (262) 299-6197 or contact our team online.
Advanced HVAC Solutions for West Allis Homes

The diverse weather patterns of West Allis make having a dependable HVAC system an absolute necessity to ensure year-round comfort. At Thielmann Heating, Cooling, and Plumbing, we deliver innovative heating and cooling solutions tailored to meet the unique demands of your home or business:
West Allis Heating Services
- Furnace Installations and Repairs: Upgrade to high-efficiency furnaces or maintain your current system with expert repairs. We ensure your home stays warm and energy-efficient during the coldest months.
- Heat Pump Systems: Achieve energy-efficient heating and cooling in one versatile system. Heat pumps are perfect for maintaining consistent indoor temperatures all year long.
- Boiler Maintenance: Keep your boiler running smoothly with our comprehensive maintenance and repair services. Enjoy even and reliable heat distribution throughout your home.
- Emergency Heating Repairs: When your system breaks down unexpectedly, count on us for fast and effective repairs.
Cooling Services in West Allis
- Central Air Conditioning: Modern AC systems provide consistent, efficient cooling tailored to your home’s specific needs. We handle installations, replacements, and repairs.
- Ductless Mini-Splits: Perfect for homes without ductwork, mini-splits offer targeted cooling solutions with exceptional energy efficiency.
- Zoned Cooling Systems: Customize temperatures in different areas of your home for personalized comfort. This solution allows you to save energy by only cooling occupied spaces.
- AC Maintenance Plans: Extend your system’s lifespan and prevent costly breakdowns with regular tune-ups and inspections.
Plumbing Services Designed for Reliability

Your home deserves a plumbing system that works effortlessly, day in and day out. That’s why Thielmann is here to provide dependable, high-quality plumbing services in West Allis tailored to your needs:
- Reliable Water Heater Services: Whether you prefer tank or tankless systems, our team ensures your water heater delivers hot water whenever you need it. We also offer energy-efficient upgrades that help you save money in the long run.
- Stylish Fixture Replacements: Revitalize your kitchen or bathroom with sleek, modern faucets, sinks, and showerheads. Not only do they look great, but they’re also built to improve water efficiency.
- Dependable Sump Pump Solutions: Avoid the stress of basement flooding with our expertly installed sump pumps. We also provide routine maintenance to keep your system ready for heavy rains.
- Efficient Garbage Disposal Services: A fully functional garbage disposal makes life easier. Count on us for repairs or installations that keep your kitchen running smoothly.
- Water Softener Installations: Hard water doesn’t have to be a headache. Our water softener solutions improve water quality, reduce scale buildup, and extend the lifespan of your appliances.
Indoor Air Quality Solutions
Take control of the air you breathe with our specialized West Allis indoor air quality services, designed to create a fresher and healthier home environment for your family:
Advanced Air Purifiers
Say goodbye to allergens, dust, and pollutants with state-of-the-art purification systems that seamlessly integrate with your HVAC setup for whole-home coverage.
Enhanced Ventilation
Experience better airflow and eliminate stale, trapped air with ventilation upgrades customized to suit your home’s needs. Improved ventilation means cleaner air and a more comfortable living space.
Precision Humidity Control
Achieve the perfect balance of humidity year-round with our professional humidifiers and dehumidifiers. These systems not only improve your comfort but also help protect your home from the effects of excessive moisture or dryness.
UV Technology for Cleaner Air
Protect your family from harmful bacteria, mold, and viruses with ultraviolet light systems integrated into your HVAC unit. These cutting-edge solutions ensure a safer, healthier indoor environment.
Commercial Services for West Allis Businesses
Thielmann is proud to partner with West Allis businesses, providing tailored solutions to ensure smooth operations and energy efficiency. Our commercial services include:
- High-Performance HVAC Systems: Keep your business comfortable with energy-efficient heating and cooling systems designed specifically for commercial spaces. We handle everything from installation to ongoing maintenance.
- Comprehensive Plumbing Solutions: From routine restroom repairs to complex piping projects, our commercial plumbing services are reliable and efficient, helping you avoid costly disruptions.
Contact Thielmann Today
Upgrade your home or business with expert services from Thielmann Heating, Cooling, and Plumbing. Contact us today to schedule a consultation or service appointment by calling (262) 299-6197. We’re proud to serve West Allis with solutions that enhance comfort, efficiency, and safety.
Recent Jobs and Reviews in West Allis, WI
Job Locations and Reviews
Responded to emergency AC service call and conducted comprehensive system evaluation in basement mechanical room. Assessed existing furnace, air handler unit, ductwork configuration, and associated HVAC components to provide replacement estimate. Documented current equipment condition, noting galvanized metal ductwork system, electrical connections, and overall installation layout for equipment replacement planning.
Responded to no cooling call on residential air conditioning system. Upon arrival, performed diagnostic evaluation of outdoor condenser unit and associated components. Unit is 10+ years old and located on exterior side of residence. Conducted visual inspection of condenser cabinet, fan assembly, electrical connections, and refrigerant lines. Assessed unit operation and determined cause of cooling failure. Completed necessary repairs to restore system functionality. Verified proper airflow through condenser coil and fan operation. Confirmed system returned to normal cooling operation before departure. Documented equipment condition with photos for service records.
Completed new residential air conditioning system installation including outdoor condensing unit and indoor evaporator coil. System was properly charged with refrigerant using calibrated digital manifold gauges, with final weights verified on precision scale to ensure optimal charge levels. All refrigerant lines were insulated, secured with appropriate fasteners, and routed professionally from outdoor unit to indoor coil connection. Electrical connections completed, condensate drainage established, and system tested for proper operation with all readings within manufacturer specifications.
Completed air conditioning system start-up on residential outdoor condensing unit. Verified electrical disconnect, circuit breaker, and service valves were in proper operating positions. System was prepared for operation with R-454B refrigerant for 35-foot lineset configuration. Performed initial system activation and confirmed proper operation of compressor and condenser fan motor. Measured supply air temperature at floor register, which indicated system was producing conditioned air effectively. Unit is now operational and ready for normal use.
Responded to service call for leaking shut-off valve serving outdoor spigot. Upon inspection, identified the existing brass gate valve with blue wheel handle was failing at the packing nut, causing water seepage. Shut down water supply to the affected line and drained system. Removed deteriorated gate valve and replaced with new quarter-turn ball valve featuring brass body and white lever handle for improved reliability and ease of operation. Installed new copper fittings as needed to ensure proper connection integrity. Verified all joints were properly soldered and leak-free. Restored water supply and tested valve operation through multiple cycles. Confirmed no leaks at valve body, connections, or surrounding pipe insulation. System returned to full service with outdoor spigot functioning properly.
Responded to no-cooling call on recently installed AC unit. Upon arrival, performed diagnostic inspection and discovered severely corroded service valve and compromised refrigerant line connections. Replaced defective brass fittings, repaired copper line connections, and verified system pressures. Unit tested successfully and returned to normal operation.
Responded to emergency AC service call and installed temporary capacitor to restore cooling function, though long-term reliability is uncertain. Documented electrical panel configuration and provided estimate for complete system replacement due to failing components.
Responded to no cooling call on system installed in 2023. Upon arrival, performed diagnostic evaluation of HVAC equipment including furnace and air handler components. Inspected system installation, verified proper PVC condensate drainage routing, checked electrical connections, and examined ductwork configuration. System components appeared to be in good condition with proper installation standards observed. Completed troubleshooting procedures and restored cooling operation to unit.
Responded to no cooling complaint on aging residential air conditioning system. Upon arrival, performed diagnostic evaluation of outdoor condenser unit showing signs of weathering and age-related deterioration. Connected manifold gauge set to measure system pressures and assess refrigerant charge levels. Gauges indicated abnormal operating pressures consistent with potential refrigerant loss or compressor issues. Advised customer that unit has reached end of serviceable life expectancy and temporary repair may not be feasible or cost-effective. Customer acknowledged plans to proceed with full system replacement and requested diagnostic findings to inform replacement decision.
Conducted on-site evaluation for air conditioning system addition to existing gas furnace and ductwork infrastructure. Assessed current HVAC equipment configuration, electrical panel capacity and available circuits for AC installation, and verified compatibility of existing forced-air distribution system with proposed cooling equipment.
# HVAC Installation Completed Successfully installed a ductless mini-split air conditioning system in an upper-level interior space with sloped ceiling configuration. The indoor wall-mounted unit was positioned on the interior wall to provide optimal air distribution throughout the room, with all refrigerant lines properly installed and concealed. System was tested, charged to manufacturer specifications, and verified operational for both cooling functionality and airflow performance.
Performed comprehensive 10-point tune-up on residential air conditioning system. Connected manifold gauges and diagnostic equipment to evaluate system performance, checked refrigerant pressures and temperatures, inspected condenser unit operation including fan motor and compressor function. Unit operating within normal parameters upon completion of maintenance procedures.
Completed installation of new Kohler two-piece toilet in residential bathroom. Removed existing fixture, verified proper flange condition, set new unit with wax ring seal, secured to floor, connected water supply line, and tested for proper operation and leaks.
Completed full HVAC system installation including new outdoor air conditioning unit with associated coil and Honeywell Home digital thermostat. Installed exterior condensing unit on composite equipment pad with proper electrical disconnect and conduit connections, established refrigerant line sets between outdoor and indoor components, and mounted programmable thermostat on interior wall for system control and temperature management.
Responded to service call for air conditioning unit producing clunking noise during operation. Upon arrival, inspected outdoor condenser unit and surrounding components, documented equipment condition with photographs showing unit properly positioned on concrete pad with adequate clearance and access to refrigerant lines and electrical connections. Conducted operational assessment to identify source of mechanical noise and verified system functionality.
Completed full HVAC system installation including new furnace, air conditioning unit, and F100 air filtration system. Installed new air handler with vertical configuration in basement utility area, connected refrigerant line set with proper insulation, and integrated all ductwork connections. All equipment mounted, electrical connections completed, condensate drainage established, and system tested for proper operation.
Conducted estimate for air conditioning system addition to existing home with Carrier gas furnace currently installed in basement. Assessed installation requirements, reviewed existing ductwork infrastructure and determined optimal placement for outdoor condensing unit on exterior side of home near foundation with PVC condensate drainage routing. Documented existing furnace configuration, available electrical service, and recommended AC unit positioning to integrate with current heating system for complete HVAC functionality.
Completed routine cooling system maintenance visit as part of membership agreement. Performed comprehensive inspection of outdoor condensing unit, which showed significant accumulation of leaves, twigs, and organic debris in the base pan and around compressor components. Cleaned debris from unit interior, inspected compressor, capacitor, refrigerant lines, and electrical connections, and verified all components were operating within normal parameters.
Responded to commercial property for water leak originating from first floor and extending down to basement level. Upon inspection, discovered deteriorated wooden structural members with significant moisture damage and rot in the affected area, evidenced by heavy black staining on horizontal and vertical support beams. Located and repaired the source of the leak involving aged copper piping showing green patina oxidation. Addressed secondary plumbing issue involving PVC drainage system with corroded metal collar fitting causing rust staining on surrounding tiled surface. Completed installation of new water line connection for refrigerator appliance as requested.
Successfully installed a new Bradford White residential water heater in the basement utility area. The installation included proper connection of copper supply piping with brass fittings and shut-off valves, gas line hookup with appropriate controls, and venting system installation. Unit was tested for proper operation and all safety checks were completed.