
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
Performed comprehensive inspection of ventilation system, identifying significant dust accumulation and particulate matter throughout the ductwork. Photos revealed extensive white speckled debris adhering to interior duct surfaces, potentially restricting airflow and affecting system efficiency. Thoroughly cleaned all accessible ductwork to restore proper ventilation and improve indoor air quality.
Performed routine HVAC system tune-up with comprehensive electrical diagnostics. Conducted amperage testing showing 0.38A and voltage measurements with readings of 536.6V using Fieldpiece SC680 meter. Inspected and verified proper electrical connections throughout system to ensure optimal performance and safety.
Performed scheduled maintenance inspection on HVAC system. Conducted thorough inspection of ductwork, noting some surface dust accumulation and minor discoloration in metal ducts. System was functioning within normal parameters; no immediate repairs required.
Responded to no heat complaint on older furnace unit. Upon inspection, found failed limit switch causing unit to cycle improperly. Replaced defective switch, cleaned blower assembly, and tested system through multiple heating cycles to confirm proper operation. Unit now functioning normally with appropriate temperature rise.
Responded to no heat complaint on Lennox Elite furnace. Conducted thorough diagnostic testing which revealed a faulty flame sensor preventing proper ignition sequence. Cleaned and reinstalled flame sensor, restored normal operation, and verified proper heating function through complete system cycle test.
Completed inspection and service of shower/tub plumbing system. Examined drainage assembly including PVC piping, elbow joints, and flexible drain lines. Verified proper function of pump and supply lines with no leaks or damage detected in the enclosed wooden cabinet housing.
Responded to no heat complaint for residential furnace system under 10 years old. Inspected HVAC air handler unit in basement utility room and identified faulty ignition module preventing proper heating cycle initiation. Replaced defective component and verified proper system operation through complete heating cycle test. System now functioning normally with consistent flame and appropriate temperature rise.
Completed preventive maintenance service on Lennox furnace. Performed visual inspection of unit and components, noting normal operation with no immediate concerns. Documented system condition with photos for service records.
Conducted routine prepaid maintenance service on HVAC system. Inspected heat exchanger which showed normal heat discoloration patterns with iridescent coloring typical of proper operation. Verified integrity of metal components and confirmed all mounting hardware was secure.
Performed annual tune-up on Rheem Classic 90 Plus furnace. Inspected heat exchanger, cleaned minor debris accumulation, and verified proper operation. System is functioning within manufacturer specifications with no safety concerns noted.
Conducted comprehensive assessment of existing HVAC system in basement mechanical room, documenting current equipment condition including water heater, Aprilaire humidifier component, and associated ductwork with reflective insulation. Prepared detailed replacement estimate after evaluating the entire system configuration and identifying optimal upgrade options for improved efficiency and performance.
Successfully installed a complete HVAC system including a new Goodman furnace unit in the utility room with proper connection of all refrigerant lines and ductwork. Mounted and configured the digital programmable thermostat on the main wall, ensuring proper system communication and functionality through comprehensive testing.
Performed scheduled tune-up on HVAC system. Inspected insulation and detected minor condensation issue. Cleaned affected areas and verified system operation was within normal parameters.
Installed new tanked water heater in utility room, complete with expansion tank and all required connections. Verified proper operation of valves and connections. System is functioning normally with no issues detected.
Performed scheduled maintenance service on HVAC system. Inspected electrical components and connections, verifying proper operation of control board and wiring integrity. Replaced dirty return air filter with new one to ensure optimal system performance and airflow.
Conducted comprehensive assessment of aging HVAC system in basement utility area showing significant wear. Recommended full system replacement due to deteriorated ductwork with visible seams and compromised metal strapping. Exterior inspection revealed inadequate PVC ventilation configuration that doesn't meet current code requirements.
Responded to no heat call for Goodman HVAC system less than 10 years old. Diagnostics revealed induced draft motor failure with voltage reading of 10.69V (significantly below operational parameters). Replaced faulty motor, tested system operation through complete heating cycle, and verified proper combustion and exhaust venting through PVC flue pipe.
Responded to no heat complaint for furnace under 10 years old. Upon inspection, discovered faulty blower motor causing system failure. Replaced motor assembly, reconnected wiring to junction box, and verified proper operation. System now functioning correctly with normal heat output.
Diagnosed and repaired no-heat condition on aging furnace by testing gas valve with manometer, which revealed insufficient gas pressure (3.4" WC) causing intermittent flame failure. Adjusted gas valve regulator to manufacturer specifications, cleaned flame sensor, and verified proper operation through complete heating cycle test.
Performed routine inspection of HVAC ducting system. Visual examination revealed some minor discoloration and possible rust formation at duct seams. Photographed interior conditions for documentation purposes. System currently functioning within normal parameters despite noted cosmetic issues.