
When it comes to keeping your home comfortable year-round in Milwaukee, Wisconsin, having reliable heating, air conditioning, and HVAC systems should not be overlooked. If you are looking for quality home services, you are in good company.
Our team of contractors offers industry-leading air conditioning, heating, and HVAC repair services in Milwaukee and will work with you to ensure your home stays cozy all year long. Trust the Thielmann Group to get the job done right. Contact our professionals at (262) 299-6197 to book an appointment and receive assistance with a defective HVAC system.
Air Conditioning Repair Services
Our air conditioning repair services are designed to address any issues such as strange noises and insufficient cooling. If you experience rising energy bills, unusual odors, loud noises, or hot air blowing out of your unit, contact our professionals for support.
Air Conditioner Replacement and Installation Services
A malfunctioning air conditioner is the last thing you want to deal with during a hot and humid summer in Milwaukee.. Our team helps you select the right unit for your home’s size and cooling needs.
Air conditioners are not meant to last forever. You might need an air conditioner replacement service if your unit is experiencing frequent breakdowns, blowing uneven air, or is over 10 years old. If you notice any of these problems, consider contacting us for reliable AC replacement services.
Sometimes, repairs aren’t sufficient. If your air conditioner is beyond repair or you are looking to upgrade to a more energy-efficient model, the Thielmann Group offers replacement and installation services to suit your needs.
Ductless Mini-Split Services
From warm summer days to cold winter nights, there is no temperature a ductless mini-split HVAC system can’t handle. For homes without ductwork or those seeking more flexible cooling options, ductless mini-split systems are a great solution. Our professionals provide installation, repair, and maintenance services for ductless mini-split systems in Milwaukee and Southeastern Wisconsin.
Furnace Repair and Tune-Up Services
Going through a winter in Wisconsin without a functioning furnace is like wearing sandals in the snow—it’s not smart. Luckily, our team offers a variety of HVAC services for local residents in Milwaukee including furnace repair options.
We will make sure your heating system functions properly when you need it most. From minor repairs to major maintenance, there is nothing our technicians can’t handle. Contact us if your furnace is not producing heat, leaking fluids, making strange noises, or short cycling.
Furnace Installation and Replacement Services
If it’s time to replace your old furnace or install a new one, our team offers expert furnace installation services tailored to your heating needs.
Our professionals will guide you through the selection process, ensuring you choose a furnace that meets your efficiency and comfort requirements, and handle the installation with precision and care.

Heat Pump System Installation and Maintenance Services
Did you know a heat pump system heats and cools your home? This heating and cooling versatility makes heat pumps a popular choice for residents in the local Milwaukee area.
Heat pumps offer year-round comfort, consistent temperature control, and improved energy efficiency for homeowners in Southeastern Wisconsin. Plus, they are much better for the environment.
Boiler Installation and Repair Services
As energy costs continue to rise, many homeowners are turning to energy-efficient boilers. Boilers are designed to heat water which is then dispersed as steam through your radiators.
Whether your old system is aging itself out or you need maintenance, our team of technicians have you covered with comprehensive boiler repair services. Get in touch with us if you notice common boiler problems like foul odors, strange noises, a yellow pilot light, or insufficient heat.
Ductwork and Indoor Air Quality Services
Old ductwork can impact your indoor air quality, especially if it develops cracks or gaps. Unfortunately, ductwork problems happen, and when they do, our team is available to provide you with superior air duct repair services to restore air circulation in your house.
Signs like uneven cooling, rising energy bills, loud noises, and the presence of mold all warrant a call to our technicians. Our team offers trustworthy ductwork and HVAC services for homeowners in Milwaukee, Wisconsin and will work with you to restore airflow throughout your system.
Expert Plumbing Services in Milwaukee, WI
Plumbing problems often occur without warning, interrupting your routine and leaving you in a messy situation. When moments like this happen, you need a team of experts who respond fast and fix the problem the right way the first time. Thielmann Heating, Cooling, and Plumbing has a team of Milwaukee plumbers who are trained to handle any problem your home throws your way with professional, quality workmanship. From clogged drains to broken water heaters, our licensed plumbers handle every job with precision and care.
We are able to handle a wide array of plumbing problems in homes both old and new. Our team uses proven repair methods and high-quality parts to ensure every fix lasts. Whether you need a new fixture installed, pipes replaced, or a sump pump serviced, we make the process simple and stress-free. If your water heater struggles to deliver consistent hot water, we can install or repair both standard and tankless units to match your household needs.
Milwaukee homeowners count on us for:
- Water heater repairs, replacements, and maintenance to keep your showers hot and steady.
- Fast drain cleaning and clog removal to keep your plumbing flowing freely.
- Fixture installation and repair for sinks, faucets, and toilets that work the way they should.
- Leak detection and pipe replacement to stop water waste and protect your home.
- Sump pump installation and maintenance to prevent basement flooding.
- Garbage disposal repair and installation to make kitchen cleanup simple.
- Water softener and filtration system installation for cleaner, fresher water in every tap.
We offer regular plumbing inspections to find small leaks or corrosion early before they cause expensive water damage. Keeping your plumbing in good shape helps lower costs, reduce waste, and extend the life of your system. Thielmann Heating, Cooling, and Plumbing proudly serves Milwaukee with honest recommendations, clear pricing, and dependable service that keeps your home running right. Call us today at (262) 299-6197 to book your plumbing appointment.

Enjoy the Local Attractions in Milwaukee and Worry Less About Heating and Air Conditioning Issues
One of the advantages of working with our team of professionals is having more time to explore the local Milwaukee, Wisconsin area. Our team will fix your broken furnace or HVAC system to ensure you are able to enjoy your weekend with friends or family in Milwaukee. The city boasts an array of fun attractions for visitors and residents.
Take a stroll along the Milwaukee Riverwalk, where you can enjoy views of the city skyline. Between the shops and restaurants, you can check out the Milwaukee Art Museum and the famous Harley-Davidson Museum.
For a taste of the rich brewing heritage in Milwaukee, don’t miss a visit to Best Place at the Historic Pabst Brewery, where you can take a guided tour and sample some of Wisconsin’s classic brews. Sports enthusiasts can also catch a game at the iconic Fiserv Forum or check out the American Family Field.
Whatever you choose to do, you can come home to comfort thanks to our team. Our crew will work hard to keep your house safe and comfortable throughout the summer or winter seasons.

Book a Heating or Cooling Appointment With Our Team in Milwaukee
Milwaukee is one of America’s greatest cities, and we are proud to have been servicing its residents for nearly 100 years. Whether you require a brand-new air conditioner or assistance diagnosing a furnace issue, we’re here to assist you.
Call our team of HVAC contractors at (262) 299-6197 to schedule a service today and get peace of mind knowing your heating and air conditioning systems are in good hands.
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 Milwaukee, WI
Job Locations and Reviews
Performed routine maintenance on HVAC system, inspecting control board (part #5009860-05) and electrical connections. Replaced existing air filter with new Filtrete Electrostatic High Performance filter (MPR 1550, 16x25x4"). All components tested and functioning properly.
Performed routine maintenance tune-up on HVAC system, including inspection of air filter which showed significant dust accumulation requiring replacement. Conducted temperature differential testing using probe to verify proper system operation and cooling performance. All components now functioning within normal parameters.
Performed scheduled prepaid maintenance visit on HVAC system. Inspected electrical connections and wiring, confirming proper installation with secure zip ties. Measured supply air temperature at 117.3°F using UEi PDT650 thermometer, verifying system is operating within normal temperature range.
Conducted a comprehensive assessment of the existing utility area with focus on plumbing and mechanical systems. Documented the condition of copper piping, valves, and fittings in the wall cavity, noting signs of aging and discoloration. Evaluated the adjacent mechanical equipment for potential HVAC system replacement, with particular attention to integration with existing plumbing infrastructure.
Performed comprehensive inspection of Carrier HVAC system located in utility area. Evaluation included examination of ductwork connections, with particular attention to the silver metallic flexible ducts and PVC pipe configuration. Recommended thorough cleaning of all accessible ductwork to improve system efficiency and indoor air quality.
Inspected furnace system and discovered severe corrosion damage in the ductwork, particularly at connection points and a 90-degree elbow joint where complete metal failure has occurred. Documented extensive rust deterioration with multiple perforations that are compromising system integrity and efficiency. Recommended immediate replacement of affected ductwork sections to prevent further deterioration and potential safety hazards.
Performed scheduled maintenance on HVAC system. Conducted electrical diagnostics using Fieldpiece SC680 multimeter, verifying system voltage readings at 1.4V. Removed and replaced heavily soiled air filter showing significant dust accumulation.
Inspected client's basement utility room housing a Lennox furnace system. Documented existing HVAC configuration including the furnace mounted on concrete pad, connected metal ductwork (cylindrical and rectangular), and associated components (likely air handler/evaporator coil). System appears properly installed with standard connections and wiring in place.
Completed installation of new HVAC system with high-efficiency furnace in basement utility area. System includes properly sealed metallic ductwork with multiple distribution branches. Noted existing floor drain shows significant corrosion; recommended monitoring for proper drainage to prevent potential water damage to new equipment.
Responded to no heat complaint on Lennox furnace. Accessed internal components by removing front panel to inspect wiring and electrical connections. Diagnosed and repaired faulty connection in blower motor circuit, restoring proper heating function.
Performed comprehensive HVAC tune-up service on residential furnace system. Inspected interior components including motor assembly, wiring connections, and heat exchanger for proper operation. Examined connected PVC venting system to ensure proper installation and ventilation compliance with NSF standards.
Performed routine tune-up service on HVAC system, including inspection of interior evaporator coil which showed some dirt accumulation at base requiring cleaning. Examined water heater and associated copper piping network, confirming proper installation with no leaks detected in plumbing infrastructure.
Performed comprehensive HVAC system tune-up including electrical diagnostics with Fieldpiece SC680 multimeter. Measured voltage readings (60.54V) and microamp current (3.4μA) to verify proper electrical operation of control circuits. All system parameters confirmed within manufacturer specifications after service completion.
Conducted site assessment for mini-split installation, evaluating interior wall space adjacent to exterior door for potential indoor unit placement. Examined exterior area through window to determine optimal condenser location and assess available space for line set routing. Property layout appears suitable for standard mini-split configuration with minimal modifications required.
Inspected existing drainage system in basement area. Identified aging cast iron vertical pipe with signs of corrosion at connection point, secured by two metal clamps showing mineral buildup. Noted PVC pipe connection to main drain line requires proper sealing and reinforcement to prevent future leaks.
Responded to no-heat call for system less than 10 years old. Diagnosed issue with thermostat not properly communicating with furnace. Recalibrated Honeywell digital thermostat and verified proper operation of ductwork connections. System now maintaining proper temperature with heat cycling correctly.
Installed new condensate drain assembly on 1st floor air handler unit. Secured existing refrigerant lines with zip ties to improve organization and prevent vibration damage. System is now properly draining with no leaks observed during final inspection.
Completed installation of new boiler system. Removed outdated equipment and addressed deteriorated insulation in the crawl space. Installed new PVC venting and properly sealed all connections to ensure efficient operation and prevent moisture issues.
Diagnosed and repaired water leakage issue in residential plumbing system. Removed wall section to access affected pipes, identified failed coupling joints on vertical supply line, and replaced damaged fittings. Inspected surrounding basement piping system for additional moisture issues and verified proper system operation after repair.
Performed scheduled tune-up service on Carrier Infinity furnace system. Inspected unit installation, ductwork connections, and PVC venting pipes. Replaced standard 20"x25"x4" Honeywell Home air filter with new one of matching specifications (actual size 19-15/16"x24-7/8"x4-3/8").