
Looking for comprehensive property system services for your home or business in New Berlin, Wisconsin? Thielmann Heating, Cooling, & Plumbing specializes in diverse plumbing, heating and cooling system solutions. We’re a full-service company offering repairs, maintenance, installations and replacements. Plus, we have 24-hour emergency HVAC services for your urgent needs!
Reliable HVAC System Repair, Replacement, & Maintenance Services
New Berlin’s weather can make it challenging to keep your home comfortable. When the temperatures skyrocket or plunge, ensure your HVAC system can handle it.
We are your go-to team for professional air conditioning, furnace, heat pump, and other HVAC services in the local New Berlin, WI area. We have the tools and expertise to get your systems working right so you can enjoy comfortable temperatures throughout your home or business.
Keeping cool in the summer requires a good air conditioner. Whether you need AC repair, replacement, maintenance, or installation services, count on our team to get the job done right.
We work on all types of cooling systems, including:
- Air conditioners: We can work on all models of air conditioning systems for residential and commercial properties.
- Heat pumps: We can repair, replace, or maintain energy-efficient heat pumps that deliver warm air inside and outside the home.
- Ductless mini-splits: We can service ductless HVAC units that provide total climate control for single rooms.
Contact our team at (262) 299-6197 to schedule AC services in New Berlin.

Additional Heating and Cooling Support We Offer
In addition to our HVAC system specialties, we can assist you with various heating solutions and components, including:
Top-Rated Heating System Services
Staying warm during the Wisconsin winter can be a struggle if your furnace, heat pump, or boiler isn’t working perfectly. No matter what is wrong with your HVAC system, we can fix it. Our team offers heating repair, replacement and maintenance services for heating systems like furnaces, boilers and heat pumps. Our professionals will help keep your New Berlin home warm throughout winter.
HVAC Ductwork Services in New Berlin
The air ducts around your home or business are the only link between your HVAC system and your rooms. You’ll have serious system trouble if any ducts are cracked, broken, disconnected, or blocked.
Our company provides comprehensive ductwork services in New Berlin. We offer air duct installation, repair, maintenance and cleaning so you can get the most out of your HVAC system.
For all your ductwork needs, call (262) 299-6197 or contact us online to schedule services today.
Reliable Indoor Air Quality Services
The air in your home can be dirtier than you may think. Dust, debris, and other harmful contaminants could be in your air, leading to respiratory illnesses and HVAC damage. The team at The Thielmann Group offers indoor air quality services, including:
- Air purifiers
- Humidifiers
- Dehumidifiers
Enjoy clean, safe air throughout your home.Schedule indoor air quality services in New Berlin by contacting us online or calling (262) 299-6197.

Commercial and Professional HVAC Unit Services
Commercial properties need top-quality HVAC systems that are made to last. Whether you need service for your system or a new one installed, look to our team for packaged unit services. We work on all brands of commercial-grade packaged HVAC units. Our team also installs packaged units for residential properties, allowing homeowners to have heating and cooling from a single, robust system. These convenient, energy-efficient systems allow for quick heating and cooling.
Trusted Plumbing Solutions for New Berlin, WI Homes
Plumbing issues never come at a good time. Whether you’re dealing with a dripping faucet or a flooded basement, Thielmann Heating, Cooling, and Plumbing provides the professional service New Berlin homeowners rely on. Our licensed plumbers are trained to handle every type of repair, replacement, and installation with precision and care.
From minor leaks to full system upgrades, we handle it all. Our technicians repair broken pipes, unclog drains, and replace worn fixtures that waste water and raise utility bills. If your water heater is struggling, we can repair it or install an energy-efficient model suited to your household. We also offer sump pump maintenance and water filtration systems that protect your home’s foundation and improve water quality.
Why homeowners in New Berlin choose Thielmann:
- Fast response times for urgent repairs
- Clear communication and upfront pricing
- Work completed to meet all local plumbing codes
- Licensed, insured professionals with years of experience
Our full range of plumbing services includes:
- Water heater repair and installation (tank and tankless)
- Drain cleaning and obstruction removal
- Leak detection and pipe replacement
- Sump pump service and installation
- Fixture, toilet, and faucet upgrades
- Garbage disposal repair and replacement
- Water treatment and filtration systems
Your plumbing system should work without worry. Thielmann Heating, Cooling, and Plumbing keeps your New Berlin home safe, efficient, and comfortable. Call today for prompt service or 24/7 emergency support when you need it most.
We Also Offer Water Conditioning Services for Clean, Safe Water
Water conditioning can clean your water, providing health benefits for you, your family or your patrons. We provide the following commercial and residential water conditioning services:
- Water filtration, including specialized carbon, reverse osmosis and sediment filters
- Whole-house filters for clean water flow through all your fixtures
- Iron curtains that eliminate sulfur, iron and manganese from water
- Water softening solutions to decrease unwanted mineral contents of hard water like calcium and magnesium
Introducing one or more of these solutions can improve the longevity of your appliances and clothing, promote better cleaning, decrease rust stains and enhance overall water quality for drinking.
Choose Thielmann Heating, Cooling, & Plumbing in New Berlin for Expert Service
Since 1929, our team has been a go-to choice for top-quality residential and commercial services in New Berlin and beyond. Our NATE-certified technicians can service all HVAC brands, install Lennox-brand units, offer 24-hour emergency care and more. You can also trust our team for extensive plumbing maintenance, repairs and installations. Plus, we offer diverse financing options, upfront pricing, special deals and a job well done. Contact us online or call (262) 384-6407 to schedule your service appointment.
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 New Berlin, WI
Job Locations and Reviews
Completed install callback and performed combustion analysis on recently installed heating system. Bacharach combustion analyzer readings confirmed proper operation with oxygen levels at 4.5%, carbon monoxide at 32 ppm, efficiency at 83.0%, and carbon dioxide at 12.2%, all within acceptable parameters for safe and efficient system performance.
Completed comprehensive HVAC tune-up service on residential air handler system located in basement utility area. Performed standard maintenance procedures including inspection of refrigerant lines, ductwork connections, condensate drainage system, and electrical components. All mechanical systems were found operating within normal parameters, with PVC drainage lines and copper refrigerant tubing showing proper installation and no visible defects.
# Warranty Service Completed Responded to warranty service call for HVAC furnace unit. Upon arrival, removed access panel to perform comprehensive system inspection. Examined all internal components including blower motor assembly, inducer motor, gas valve connections, and electrical wiring harnesses. Inspected black condensate drainage pipes for proper flow and verified no blockages present. Checked all wire connections including green ground wires and multi-colored control wiring for secure terminations. Verified proper operation of white control board with associated switching mechanisms and confirmed all safety circuits functioning correctly. Inspected metallic cylindrical motor assemblies and associated mounting hardware for secure installation. All components found operating within manufacturer specifications. Unit tested and returned to normal operation.
Completed routine HVAC maintenance inspection on prepaid service agreement. Performed temperature diagnostics in attic space using infrared thermometer to verify proper system operation and insulation effectiveness. Inspected basement mechanical area including main supply ductwork, flexible branch lines, and HVAC infrastructure to ensure proper airflow and system integrity. All equipment operating within normal parameters with no deficiencies noted.
Completed plumbing estimate for powder room fixture replacement. Assessed existing undermount sink with bronze two-handle faucet and evaluated under-cabinet plumbing configuration, including PVC P-trap assembly, chrome tailpiece with mounting flange, and flexible braided water supply lines. Provided detailed estimate for potential fixture upgrades and plumbing component replacements as requested.
Completed HVAC system replacement estimate for residential property. Assessed existing Royalton furnace unit located in utility room, evaluating current ductwork configuration including flexible metal ducts, PVC intake/exhaust venting system, and associated copper piping connections. Documented equipment condition, spatial constraints, and installation requirements to provide comprehensive replacement recommendations for upgraded heating and cooling system.
Performed sump pump inspection and documentation in residential basement utility space. Examined existing sump pump system including discharge piping with PVC connections, pump basin condition, and operational components. Basin showed significant sediment buildup, mineral deposits, and water level staining on interior walls, indicating regular water accumulation and pump cycling. Documented pump housing condition, discharge pipe configuration with visible red coupling connection, and drainage system including corrugated intake line. System components appeared functional with proper floor drain cover installation and secure pipe mounting hardware in place.
Responded to a plumbing service call for shower/tub issues and performed an inspection of the water supply system. Upon investigation, discovered severely corroded galvanized piping with extensive mineral buildup and scale accumulation that had significantly restricted water flow and reduced the internal diameter of the pipes. Replaced the deteriorated pipe section with new copper piping, installing compression fittings to ensure proper connections. The old pipe exhibited heavy corrosion throughout, with thick crusty deposits coating the interior walls, which was causing reduced water pressure and flow issues to the shower/tub fixtures. Completed the pipe replacement in the basement/crawl space area, securing all new copper lines properly along the existing floor joists to restore full water flow capacity to the bathroom fixtures.
Completed commercial HVAC equipment replacement estimate for a food processing facility, assessing existing rooftop unit mounted in mechanical room with wall-mounted controls and evaluating requirements for new equipment installation to maintain proper temperature control and air quality standards in the production area. Documented current system configuration including mounting hardware, electrical connections, ductwork connections, and thermostat placement to ensure accurate replacement specifications for the climate-controlled food preparation environment with multiple work stations.
Completed installation and startup of tankless water heater system with all internal components properly mounted and configured within white metal enclosure. Verified proper connections of copper supply lines, gas valves with yellow handles, heat exchanger assembly, control board wiring, and circuit panel functionality, with all piping extending through floor penetrations and system tested for safe operation.
Completed sump pump installation in basement utility area, including new discharge piping system with white PVC drainage lines and proper floor drain connection. Installed copper piping assembly with ball valves (blue and red handles for easy identification) connected to the pump system, along with pressure relief components and necessary fittings to ensure proper operation and code compliance.
Completed comprehensive tune-up maintenance on residential gas furnace system. Performed full system inspection including gas valve operation, control board functionality, electrical connections, and venting components. Verified proper operation of all safety controls, confirmed adequate combustion air supply through PVC intake piping, and ensured exhaust venting meets code requirements.
Conducted comprehensive evaluation of existing residential HVAC system located in basement utility area for equipment replacement estimate. Assessed current furnace unit, ductwork configuration, and associated mechanical components including water heater connections and ventilation systems. Documented equipment condition, spatial constraints, existing infrastructure including exposed ceiling joists, concrete flooring, and proximity to adjacent storage areas. Photographed current installation showing beige furnace with metallic ductwork, insulated ventilation components, electrical connections, and copper and PVC piping arrangements to provide detailed reference for replacement specifications and system upgrade recommendations.
Completed prepaid HVAC maintenance visit and performed system inspection. Examined flame sensor electrode, which showed signs of carbon buildup, and inspected pipe insulation for proper sealing and condition. All components were evaluated for proper operation and system readiness.
# Plumbing Install - Piping Job Description Completed installation of white PVC piping system spanning ceiling cavity and interior wall framing. Routed Type CAE/LINE PVC pipe through overhead space above drop ceiling, utilizing proper fittings including T-joints and elbows to achieve required configuration. Secured piping to wooden joists with appropriate hangers and supports to prevent sagging and ensure code compliance. Installed vertical PVC pipe runs through exposed wall framing, connecting to white plastic junction box housing red and blue valve controls. Configured complex routing pattern with multiple elbows and joints to navigate structural obstacles and achieve proper drainage slope. Integrated piping system through floor penetrations, ensuring proper sealing and support at transition points. Mounted control valve assembly to wall studs at accessible height for future maintenance and operation. Verified all connections were properly solvent-welded and pressure-tested system
# HVAC Install - Ductwork Service Report Completed installation of new ductwork system in residential attic space, including rigid metal supply ducts with flexible elbow connections to ensure proper airflow routing around structural beams. Installed new wall-mounted air return vent register in living space with proper integration to existing HVAC system, securing all connections and verifying adequate air circulation throughout the conditioned area.
# HVAC Service Report - Furnace Maintenance Performed comprehensive inspection and maintenance service on residential forced-air heating system located in basement mechanical room. System consists of central air handler unit with integrated ductwork distribution system and Honeywell HE225A flow-through humidifier mounted on supply plenum. Conducted thorough visual inspection of air handler cabinet, noting accumulated dust and debris on exterior surfaces and surrounding ductwork components. Inspected all accessible ductwork connections including horizontal supply trunk lines and flexible duct transitions for proper sealing and structural integrity. Verified secure mounting of all equipment and absence of excessive vibration points. Examined whole-home humidification system including Honeywell HE225A unit mounted to supply duct. Inspected copper water supply line with shutoff valve for proper connection and absence of leaks. Verified humidistat wiring connections and control circuit f
# Plumbing Estimate - Sump Pump Conducted comprehensive assessment of existing sump pump system in basement crawl space. Inspected sump basin installation, pump mechanism, and associated discharge piping configuration. Evaluated PVC discharge line connections, check valve installation, and electrical cord routing for code compliance and operational efficiency. Documented current pump positioning within basin and verified proper float switch clearance. Assessed surrounding concrete floor conditions and structural framing around pit opening. Noted deteriorated fiberglass insulation in overhead joist bays indicating potential moisture infiltration concerns that may impact pump workload. Photographed complete system layout including piping connections, basin condition, and utility area infrastructure to provide detailed documentation for estimate preparation.
# Plumbing Service - Inspection Summary Conducted comprehensive plumbing inspection of residential basement mechanical room and water treatment system. Inspected Coleman water softener installation including copper supply lines, multiple ball valve shutoff points, and proper electrical connections. Verified water softener control panel operation and examined plumbing configuration for compliance with installation standards. Evaluated furnace area plumbing connections including gas line routing, PVC exhaust/intake venting system, and associated mechanical equipment installations. Inspected all visible piping for proper support, secure fittings, and absence of leaks or corrosion. Confirmed adequate clearances around equipment and proper installation against foundation walls. Documented current condition of all plumbing components with photographic evidence for service records. All inspected systems found to be functioning within normal parameters with professional-grade installations
Performed comprehensive inspection of ductwork system, identifying significant dust accumulation and early-stage corrosion at connection points. Interior examination revealed perforated sections with visible rust formation and debris buildup that could potentially restrict airflow and reduce system efficiency.