
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
Responded to service call for AC unit producing loud buzzing noise and causing lights to dim upon startup, indicating potential electrical issues. Upon inspection, found outdoor condensing unit showing signs of weathering and dirt accumulation on exterior panels. Performed diagnostic assessment of electrical components and compressor operation to identify source of abnormal noise and voltage draw. Unit is covered under active parts and labor warranty installed earlier this year.
Completed routine cooling season maintenance visit per membership agreement. Performed comprehensive system inspection of outdoor condensing unit, verified electrical measurements using clamp meter showing nominal capacitor readings, and checked refrigerant pressures with manifold gauges to confirm proper system charge and operation. All components found operating within manufacturer specifications with no repairs needed at this time.
Completed scheduled cooling system tune-up and preventive maintenance inspection as part of recurring membership agreement. Performed comprehensive evaluation of air conditioning unit exterior components, verified proper ventilation airflow through louver panels and filter media, and confirmed electrical connections and conduit installations were secure and functioning correctly.
Completed HVAC equipment assessment for furnace replacement estimate in basement mechanical room. Evaluated existing dark-paneled furnace unit with blower access, associated white PVC venting system extending to ceiling joists, and existing electrical panel with dual columns of circuit breakers to determine compatibility requirements for new equipment installation. Documented current system configuration including humidifier/air treatment device mounted on ductwork, concrete floor conditions, and access parameters for replacement work.
Installed a 50-gallon natural vent Bradford White water heater in basement utility area. Connected copper supply lines, installed thermal expansion tank with brass fittings, and completed all necessary plumbing connections including pressure relief valve. Verified proper venting configuration and tested unit for safe operation.
Completed routine cooling season maintenance visit under membership agreement. Performed comprehensive A/C tune-up including system inspection of evaporator coil, heat exchanger fins, and electrical components. Replaced air filter with Honeywell 16x25x4 media filter. Inspected condenser unit control board, capacitor, and all electrical connections for proper operation. Verified all wiring terminations secure and system operating within manufacturer specifications. Documented equipment condition with photos showing clean coil surfaces and properly functioning control components.
Completed residential water heater installation in basement utility area. Retrieved new unit from Ferguson supply house and coordinated arrival with customer onsite. Installed tall cylindrical water heater with proper connections to existing plumbing system, including copper supply lines and flexible connectors. Mounted blue expansion tank horizontally above unit and connected to water system. Installed metallic flue piping for proper venting. Verified all connections to electrical panel and ensured proper grounding and circuit protection. Tested system operation and confirmed no leaks at all connection points.
Provided estimate for disconnecting and reconnecting two outdoor condenser units to accommodate new patio installation. The dual-unit system, currently installed on a concrete pad along the brick exterior, will require temporary disconnection of refrigerant lines, electrical connections, and condensate drainage during the patio construction process, with full reconnection and system testing upon completion of the concrete work expected to take approximately five days.
Conducted estimate for complete HVAC system replacement including natural gas furnace and air conditioning unit. Existing furnace located in basement is operational but experiencing extended run times to reach desired temperature settings due to age and decreased efficiency. Evaluated electrical panel showing 30-amp Square D circuit breaker and existing ecobee digital thermostat currently set to 74 degrees in heating mode. Recommended full system replacement to restore proper heating and cooling performance.
Responded to no cooling complaint on residential split system air conditioner. Upon arrival, found outdoor condenser unit operational but system running continuously without achieving setpoint temperature. Unit is over 10 years old and showing signs of age-related performance degradation. Performed visual inspection of exterior equipment and confirmed unit location and basic operational status. Customer advised of findings and system condition.
Responded to service call for non-operational dehumidifier system. Upon arrival, performed thorough assessment of existing Aprilaire whole-home dehumidifier unit located in basement utility area. Observed significant rust-colored water staining on concrete floor near equipment, indicating previous moisture issues or drainage problems. Inspected unit condition, drainage lines, and surrounding HVAC components. Documented equipment model information and current installation configuration. Photographed existing conditions including water damage evidence, unit placement, and associated plumbing connections. Provided comprehensive estimate for dehumidifier replacement to address non-functional unit and prevent further moisture-related issues in the space.
Conducted on-site assessment of non-operational residential water heater in basement utility area. Evaluated existing Guardian EverKleen Fury model unit, documented current installation including copper and PVC piping connections, shut-off valves, electrical conduit, and overall system configuration. Provided comprehensive replacement estimate for new water heater installation.
Completed comprehensive air conditioning tune-up and preventive maintenance inspection as part of recurring membership service. Performed standard system evaluation of outdoor condensing unit, inspecting condenser coil, fan motor operation, and refrigerant line insulation integrity. All components found operating within normal parameters with no deficiencies noted.
Conducted estimate for complete HVAC system replacement including non-functional air conditioning unit and furnace located in basement mechanical space. Documented existing equipment configuration, electrical panel circuit assignments for furnace and AC units, and assessed utility room conditions to provide comprehensive replacement recommendations.
Replaced a 40-year-old exterior hose bib that had reached the end of its service life due to extensive weathering and corrosion. Removed the deteriorated spigot with oxidized star-handle valve from the brick exterior wall, installed new frost-proof sillcock with shutoff valve accessible from interior basement location, and secured all copper supply lines with proper mounting brackets to concrete block foundation wall. All connections were tested and verified leak-free upon completion.
Conducted comprehensive estimate for complete HVAC system replacement including air conditioning unit and gas furnace in basement installation. Assessed existing equipment configuration, ductwork connections, and electrical requirements; documented current system layout with photographs and discussed military discount options with homeowner.
Completed commercial rooftop unit installation on flat membrane roof. Coordinated equipment delivery and crane service for proper placement of new RTU alongside existing rooftop HVAC equipment. Unit positioned on raised curb, with all rigging, electrical connections, and startup procedures executed per manufacturer specifications.
Responded to a diagnostic service call for a malfunctioning sump pump discharge system. Upon inspection, identified two critical issues: a leak at the exterior connector where the discharge hose attaches to the sump pump, and a disconnected discharge pipe at the underground culvert connection point. Documented the faulty connections and deteriorated hose clamps with photographic evidence showing the corrugated flexible drainage components, PVC fittings, and compromised connection points at the building foundation. The disconnected underground pipe junction was preventing proper water evacuation from the sump system, creating potential flooding risk and foundation damage concerns.
Responded to service call for non-functional water heater in residential basement. Upon arrival, assessed existing HydroPro brand water heater with connected copper supply lines, temperature and pressure relief valve, discharge piping, and mounted expansion tank. Provided comprehensive estimate for complete water heater replacement system to restore hot water service to occupied residence with children present.
Responded to no cooling call where outdoor condenser unit and air handler were not operating. Upon arrival, diagnosed electrical issue preventing both condenser and air handler from receiving power while furnace cycled normally. Identified failed control board or wiring fault in HVAC system, documented equipment condition with photos showing ductwork, control box, and copper refrigerant lines in mechanical room.