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) 315-3067 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) 315-3067. We’re proud to serve West Allis with solutions that enhance comfort, efficiency, and safety.
Recent Jobs and Reviews in West Allis, WI
West Allis, WI at a glance
Thielmann Heating, Cooling & Plumbing has completed 20 jobs in West Allis, WI between September 2026 and October 2026.
The most recent job was on October 20, 2026.
Thielmann Heating, Cooling & Plumbing has completed 109 jobs in West Allis, WI in the last 12 months.
Job Locations and Reviews
Performed an on-site replacement estimate for a 62-year-old Heil 80% AFUE natural gas upflow furnace, documenting the unit's condition, nameplate data, and surrounding galvanized supply/return ductwork and flue venting through the wall. Noted significant dust and debris accumulation inside the cabinet, aged and soiled equipment, and a stained, uneven concrete floor at the base of the unit. Documented the existing configuration to support sizing and replacement recommendations for a new high-efficiency furnace.
Responded to a non-operational furnace and performed an on-site evaluation of the existing upright gas furnace, plenum, and ductwork in the basement utility area to prepare a replacement estimate. Documented the unit's condition, including the dusty, aged supply plenum and ductwork, the condensate/PVC piping, and the stubbed PVC and corroded metal piping near the base, noting the stained concrete floor and clearance around the equipment for installation planning. Replacement recommendations were prepared based on the findings.
Responded to a no-heat call on a Lennox gas furnace displaying fault code E207. Inspected the integrated furnace control board, wiring harness, and connections, finding no visible signs of damage, burning, or corrosion, and performed diagnostics to resolve the fault condition and restore heating operation. The unit is covered under the remaining 10-year parts warranty.
Responded to a no-heat call and inspected the system's flexible ductwork using a borescope, identifying a torn section of the duct's outer jacket and insulation along with dust and debris buildup at a bend in the line. Documented the damaged duct and diagnosed the compromised air distribution as a contributing factor to the loss of heat.
Responded to a no-cool call on a 10+ year old rooftop unit and traced the fault to the economizer, which was not responding to control signals. Inspection of the economizer control wiring revealed scorched, charred wire splices and burnt conductor ends with soot residue, indicating overheated connections and damaged wiring. Documented the damaged wiring and failed connections with photos and identified the burnt wiring as the cause of the economizer failure and loss of cooling.
Performed a visual inspection of an aged Heil upright gas furnace to evaluate its serviceability, noting surface rust and heavy dust accumulation at the flue/duct collar and burner compartment, along with debris on the interior ledge. Gas piping, shutoff valve, and flue connections were observed and documented, and the unit's age and condition were assessed for continued use.
Installed new submersible sump pump in existing concrete sump pit to restore proper water removal and drainage functionality. Positioned pump in pit with vertical PVC discharge piping and connected electrical supply for reliable operation. Installation completed in basement area showing previous water exposure, ensuring effective water management system is now operational.
Completed full HVAC system replacement including installation of new furnace, air conditioning unit, and thermostat in basement utility area. Adapted system to existing 2" PVC venting infrastructure and reused existing filter cabinet to maintain cost efficiency. Installed new 25-foot refrigerant line set with proper insulation, connecting outdoor condensing unit to indoor air handler. Configured air handler with condensate pump and drainage lines for proper moisture removal. Additionally installed new residential water heater with complete gas connections, pressure relief valve, supply and return piping with brass fittings, and expansion tank mounted above unit. All installations performed to manufacturer specifications and local code requirements, with systems tested and operational upon completion.
Completed toilet flange replacement at residential bathroom. Removed deteriorated flange showing significant rust staining and corrosion around mounting bolt holes. Installed new flange, ensuring proper seal and secure mounting to existing tile floor. Toilet reinstalled and tested for proper operation and leak-free performance.
Completed installation of 40-gallon Bradford White tanked water heater in basement mechanical room. Connected copper supply and discharge piping with appropriate shut-off valves, installed blue expansion tank mounted to ceiling joists with secure brackets, and verified all plumbing connections for proper operation and code compliance.
Completed full tune-up and system inspection on Lennox high-efficiency gas furnace. Measured supply air temperature and airflow at registers using digital instruments to verify proper system operation. Performed comprehensive visual inspection of unit cabinet, PVC intake/exhaust venting, electrical connections, and associated components to ensure all equipment operating within manufacturer specifications.
Provided estimate for replacement of existing 1/3 HP sump pump located in basement corner sump basin. Assessed current pump condition, PVC discharge piping configuration, and electrical connections to determine scope of replacement work and equipment specifications required.
Responded to emergency furnace evaluation following previous technician's assessment indicating failed control board and fire hazard. Performed complete system inspection and provided detailed estimate for full furnace replacement unit. Customer elected to proceed with furnace-only replacement at this time, deferring air conditioning system work for future consideration.
Completed comprehensive oil furnace tune-up on Armstrong unit model LUF80B57D103A. Performed full system inspection including burner assembly, combustion chamber, Honeywell primary control with reset functionality, gas valve operation, and electrical connections. All components cleaned, tested, and verified for proper operation with system returned to safe working condition.
Responded to service call for boiler experiencing multiple issues including water leaks from burst pipe, inadequate heating distribution with only upper level receiving heat, and overall system malfunction. Performed diagnostic inspection of boiler unit and heating components, documenting condition of heat exchanger elements showing significant corrosion, mineral deposits, and uneven wear patterns indicating compromised combustion chamber integrity. Examined wiring connections and control components, noting configuration of electrical connections and access panels for further assessment of heating zone distribution problems.
Replaced defective exterior hose bib mounted on brick foundation wall. Removed old fixture, installed new frost-proof hose bib, and tested for proper operation and leak-free connections. Unit is now fully functional and ready for use.
Completed diagnostic service call for gas line capping requirement. Successfully capped exposed gas line fitting protruding from wall in utility area, ensuring safe termination of unused gas supply connection. Verified proper seal and conducted safety inspection of capped line to prevent potential gas leaks.
Completed comprehensive tune-up service on two furnace systems, performing standard maintenance procedures including filter inspection, burner assembly cleaning, and safety control verification. Supply air temperature measurements confirmed proper heat exchanger operation at 70°F, and thermostat calibration verified accurate temperature control with system maintaining 73°F ambient temperature in heat mode with humidity levels at 60%.
Installed a 40-gallon standard vent water heater with complete plumbing connections, including copper piping with shut-off valves and a wall-mounted blue expansion tank. The installation was completed in accordance with manufacturer specifications, with all safety components properly connected and the unit positioned on a tiled utility room floor with proper clearances maintained.
Responded to emergency call for burst pipe in basement. Upon arrival, performed diagnostic inspection and located compromised copper supply line behind damaged drywall section. Extensive water damage and staining evident throughout affected cavity area, indicating prolonged leak prior to pipe failure. Assessed structural framing and plumbing configuration, documented damage with photos, and provided customer with repair recommendations including pipe replacement and restoration of water-damaged surfaces.