
In the local Burlington, Wisconsin, area, two things are absolutely certain. First, it’s the birthplace of none other than Tony Romo. Second, the weather here can be quite a challenge, whether it’s scorching hot or bone-numbingly cold. But fear not! You can keep your home or business comfortable all year round by making sure your HVAC and plumbing systems are up to the task.
Our team offers extensive heating, ventilation and air conditioning (HVAC) and plumbing services for property owners in Burlington. We have the tools and expertise to get your systems working right so you can enjoy a smooth-running property throughout the year.
For top-tier services in Burlington, entrust the services of Thielmann Heating, Cooling, & Plumbing by calling (262) 384-6407 or filling out this form to get started.
Dependable AC Services
Keeping cool in the summer requires a good air conditioner (AC). Our dedicated team has the knowledge and skills to provide trusted AC services that help prevent unexpected breakdowns and boost the efficiency of your system. We service the following types of cooling systems:
- 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 to the outside of the property.
- Ductless mini-splits: Get services for ductless HVAC units, which offer climate control for single rooms.
Whether you need air conditioner repair, replacement or maintenance, count on our team to get the job done right. From major overhauls to routine maintenance or repairs, we’ll tend to your air conditioner for a reliable system all season. Our AC services include:
- Air conditioning repair: Refrigerant leaks, frozen coils or a faulty capacitor are some signs you need AC repairs. A technician will examine the unit and fix any issues.
- Air conditioning maintenance: Make the most of your AC. Annual tuneups can help boost the unit’s performance, improve its longevity and avoid costly surprises.
- Air conditioning installation: If it’s time for a new cooling unit, rest assured the HVAC specialists at Thielmann Heating, Cooling, & Plumbing can install your new AC with precision.
Ductwork Services in Burlington, Wisconsin
The air ducts around your home or business are the only link between your HVAC system and your rooms. You may be inconvenienced if any ducts are cracked, broken, disconnected or blocked.
Our team provides comprehensive HVAC and ductwork services for customers in Burlington, Wisconsin, including installation, cleaning, maintenance and repairs.
For all your ductwork needs, call (262) 299-6197 or contact us online to schedule services today.

Top-Rated Heating Services
Staying warm during Wisconsin’s winters can be a struggle if your furnace or boiler isn’t working as it should. No matter what issue you have with your heater, we provide superior heating services. Our technicians offer convenient furnace repair and boiler maintenance services and are available to restore comfort to your property. More about our heating services:
- Heating repairs: If your heater is acting up, get dependable, fast repairs. We can mend heat pumps, boilers, oil and gas furnaces and packed units.
- Heating maintenance: Ensure your heater keeps working as it should with regular heating maintenance from Thielmann Heating, Cooling, & Plumbing. We’ll thoroughly inspect your entire heating system and identify issues that need repair.
- Heating installation: Installing a new heater can clean your indoor air better, use electricity more efficiently and give you more peace of mind. Count on us to install your heater with professionalism and attention to detail.
Reliable Indoor Air Quality Services
The team at Thielmann Heating, Cooling, & Plumbing offers the following indoor air quality services to keep your spaces cleaner and healthier:
Professional Plumbing Services
You rely on your plumbing daily, and when it malfunctions, you need fast service. The expert plumbers at Thielmann Heating, Cooling, & Plumbing are ready to provide quality plumbing assistance. With our assistance, you can enjoy a system with consistent water pressure and durable fixtures. Our plumbing services include:
- Bathroom and kitchen remodels
- Garbage disposal services
- Hose bib replacements
- Sump pump services
- Water conditioning
- Faucet and toilet replacements
- Water heater services
- Plumbing installations
- Plumbing repairs
- Broken pipe repairs
Enjoy clean, safe air throughout your home.Schedule indoor air quality services in New Berlin by contacting us online or calling (262) 299-6197.

See What Makes Us Different
We’re proud to provide quality work with every project. Here’s why you should choose us:
- Committed to quality: We value transparency and have an A+ rating on the Better Business Bureau (BBB).
- Responsive and respectful: Our support staff and technicians listen to your needs and answer every query you may have.
- Seasoned experts: We have licensed technicians skilled in handling all your HVAC and plumbing needs.
Choose Thielmann Heating, Cooling, & Plumbing in Burlington, WI
Since 1929, our team has been the choice for top-quality residential and commercial HVAC services in Burlington and beyond. Our NATE-certified technicians can service all brands, install Lennox-brand units, offer 24/7 emergency care and more.
We’re also proud to extend our capabilities to plumbing, providing comprehensive services you can trust. Plus, we offer upfront pricing, financing options, special deals and a job well done.
For more information, contact us online. You can also call us at (262) 384-6407 or schedule the HVAC and plumbing services you need online.
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 Burlington, WI
Job Locations and Reviews
Completed full installation of new air conditioning system and evaporator coil at residential property. Outdoor condensing unit was set on ground-level pad, refrigerant lines were run and connected to new indoor coil mounted above existing Lennox furnace, and all electrical connections were established. System was charged with refrigerant, leak-tested at all connection points, and performance verified using digital manifold gauges with measured readings confirming proper operation within manufacturer specifications.
Responded to no cooling complaint on 10+ year old residential air conditioning system. Upon arrival, found first floor thermostat with non-functioning buttons affecting system operation. Accessed basement furnace and outdoor condensing unit to perform diagnostic testing. Connected manifold gauges to condenser service ports to check refrigerant pressures and system performance. Evaluated airflow, temperature differential, and overall system operation. Identified thermostat malfunction as primary issue preventing proper cooling on first floor. Recommended thermostat replacement to restore full system functionality and proper temperature control.
Completed comprehensive furnace and air conditioning tune-up service, performing standard maintenance protocols and system diagnostics using manifold gauge set to verify refrigerant pressures and overall system performance. Configured thermostat settings to enable independent fan operation without activating heating mode, allowing for continuous air circulation as requested.
Completed comprehensive HVAC system estimate for replacement and reconfiguration of existing downflow furnace setup. Assessment included evaluation of return duct penetrating crawlspace requiring removal, existing lineset condition and potential relocation needs, water softener repiping requirements, and iron curtain relocation. Documented current equipment configuration with existing coil positioned on top of downflow furnace unit and photographed ductwork penetrations through wall structure with metallic sealing, as well as mechanical room layout showing current Goodman heating unit, associated ductwork, and copper refrigerant lines requiring attention.
# HVAC Service Completed Responded to a no cooling call with system failure indication. Upon arrival, performed diagnostic evaluation of the outdoor condensing unit. Inspected electrical control panel and internal components including the Totaline dual run capacitor, control boards, and associated wiring connections. Utilized Yellow Jacket manifold gauge set to check refrigerant pressures and system operating parameters. Tested electrical components with multimeter to verify proper voltage and continuity. All wiring connections were found intact and properly terminated to capacitor terminals and control boards. Identified system failure cause and restored cooling operation. Unit tested and confirmed operational at time of departure.
Completed tune-up service on residential outdoor air conditioning unit. Performed standard diagnostic testing including electrical measurements, with multimeter readings confirming proper voltage levels at 501V. Unit operating within normal parameters with no issues identified.
Completed installation of new air handler unit in basement location. Installed Patriot control module, connected refrigerant lines, configured electrical wiring and controls with multi-colored low-voltage connections, and integrated supply and return ductwork with flexible silver ducting. Unit tested and operational with evaporator coil assembly properly illuminated and functioning.
Responded to callback for air conditioning unit that would not shut off. Upon arrival, inspected PRO1 programmable thermostat and found system continuously running. Diagnosed faulty thermostat relay causing compressor to remain energized regardless of temperature setpoint. Verified outdoor condensing unit operation and confirmed proper electrical connections at disconnect box. Issue resolved and system cycling properly at departure.
Responded to no-start condition on 4-year-old Lennox outdoor condensing unit. Upon inspection, discovered failed contactor coil showing visible heat damage and discoloration to copper windings. Replaced defective contactor, restored power to unit, and verified proper system operation with successful startup and normal cooling cycle.
Completed preventative maintenance tune-ups on two Lennox air conditioning systems, including one outdoor condensing unit and one basement furnace/air handler combination. Performed comprehensive system inspections, checked refrigerant pressures using manifold gauges, tested electrical components and capacitors, verified proper airflow, and installed two customer-provided air filters to ensure optimal system performance for the cooling season.
Completed comprehensive spring tune-up on residential air conditioning system. Performed full system diagnostics using manifold gauge set to verify refrigerant pressures and charge levels, confirming proper operation of outdoor condensing unit. All components inspected and system found operating within manufacturer specifications.
Completed comprehensive mechanical room inspection for new homeowner experiencing multiple system issues. Evaluated central air conditioning system, including air handler unit, refrigerant lines, and ductwork connections. Inspected furnace installation, mounting hardware, and electrical connections. Assessed water softener system and related plumbing components. Identified chimney connection requiring attention and provided recommendation for proper venting modifications to ensure safe operation of heating equipment. Documented existing HVAC equipment condition, noting standard installation configuration with metallic ductwork secured with proper strapping. Verified air handler mounting, drainage system components, and copper refrigerant line routing. Observed wall-mounted auxiliary equipment with copper piping connections in utility area. Recommended chimney service to address venting concerns for optimal system performance and safety compliance.
Arrived within scheduled window and assessed non-operational HVAC system located in basement utility area. Evaluated existing gray metal furnace/air handler unit with cylindrical blower motor and connected ductwork, documented current equipment configuration and electrical panel setup, and provided comprehensive replacement estimate for new system installation to restore heating and cooling functionality.
Completed furnace and air conditioning tune-up maintenance service. Performed system inspection with access panel removal, checked blower motor assembly and electrical connections, verified proper condensate drain operation, and tested refrigerant pressures using manifold gauges on outdoor unit. All components operating within normal parameters upon completion.
# HVAC Furnace Installation Completed installation of 80% efficiency gas furnace at residential property. Installed new furnace unit with proper venting and gas line connections. Performed comprehensive system diagnostics using digital manometer to verify proper operation. Measured gas pressure at 0.342" W.C. and temperature rise at 71.6°F, confirming unit is operating within manufacturer specifications. Verified all electrical connections, tested safety controls, and ensured proper airflow through the system. Unit commissioned and left in full operational status.
Completed scheduled cooling system maintenance visit as part of membership agreement. Performed comprehensive AC tuneup on residential outdoor condensing unit, including refrigerant pressure testing and system diagnostics using manifold gauges. Verified proper operating pressures, inspected electrical connections, and ensured unit functionality for optimal cooling season performance.
Completed routine cooling season maintenance visit under membership agreement. Performed comprehensive AC tune-up including system inspection in crawl space installation, verified proper operation of air handler and ductwork connections. Measured refrigerant pressures using manifold gauges at outdoor condensing unit, confirmed system operating within manufacturer specifications. All electrical connections, copper refrigerant lines, and ductwork supports inspected and found secure. Provided Healthy Climate HC16-28 filter as requested for system air quality maintenance.
Completed routine cooling system maintenance under membership agreement. Connected manifold gauge set to outdoor condensing unit and performed refrigerant pressure diagnostics on both high and low sides. Verified system pressures were within manufacturer specifications. Conducted standard tune-up procedures including visual inspection of condenser unit, electrical connections, and refrigerant lines. All components operating normally with no deficiencies noted at time of service.
Performed comprehensive air conditioning tune-up service utilizing Yellow Jacket TITAN 4-valve manifold gauge set to measure system pressures and verify proper refrigerant charge levels. System diagnostics showed readings of 609 PSI, and all refrigerant lines, electrical connections, and service ports were inspected to ensure optimal performance and system efficiency.
Completed scheduled cooling system maintenance visit on Lennox outdoor condensing unit. Performed comprehensive tune-up inspection, measured system temperatures at ductwork registering 23°F, and verified proper operation of all components. Unit found in good working condition with no issues requiring immediate attention.