Reliable HVAC services are necessary to combat the extreme weather conditions for which Hartford, WI, is known. The Thielmann Group is here to meet those needs, ensuring your comfort and safety year-round. We understand the importance of a well-functioning HVAC system and clean indoor air quality, so we offer comprehensive solutions designed to keep your home comfortable and healthy.
Our team of highly skilled and NATE-certified technicians is here when you need us the most, offering 24/7 emergency HVAC services to tend to all your urgent repair requests. Are you worried about the cost of replacing your HVAC system? We provide free estimates to help you plan your budget accordingly.
Don’t wait until your HVAC system breaks down. Contact us today at (262) 299-6197 to request our professional HVAC services and experience the difference firsthand!

Same-Day Heating Services
The Thielmann Group takes pride in offering same-day heating solutions to families throughout Hartford, WI. Our team has experience repairing and maintaining all types of heating equipment, including:
- Boilers: Whether your boiler needs repair, maintenance, or replacement, our experts can handle it all.
- Gas furnaces: Keep your home warm with our gas furnace installation, repair, and maintenance services.
- Oil furnaces: We provide comprehensive solutions for oil furnace systems to ensure your home stays cozy during the coldest months.
- Heat pumps: Our skilled technicians are well-versed in installation, repair, and maintenance to keep your indoor climate just right.
Reliable Cooling Services
Stay cool during the sweltering summer months with The Thielmann Group’s reliable air conditioning solutions. Our services proudly include installation, replacement, repair, and maintenance for various cooling systems, including:
- Central air conditioning: We ensure your central AC system runs efficiently to keep your home comfortable.
- Ductless mini-splits: We offer ductless mini-split installation and maintenance services for homes without ductwork.
- Packaged units: Our experts are equipped to handle packaged unit systems for both residential and commercial properties.
Trust us to keep your home cool and comfortable throughout the summer season. Call (262) 299-6197 today to schedule AC services in Hartford, WI!
Signs You Need HVAC Services in Hartford
Is your HVAC system in need of urgent attention? Here are some signs to watch out for:
- Inconsistent temperatures: Uneven heating or cooling throughout your home.
- Increased energy bills: A sudden spike in energy costs can indicate HVAC system inefficiency.
- Strange noises: Unusual sounds from your HVAC system may indicate a problem.
- Poor air quality: Dusty or polluted air can lead to health issues for you and your family.
If you notice any of these signs, don’t hesitate to contact The Thielmann Group at (262) 299-6197 for prompt and professional HVAC services!
Top-Rated Air Quality Services
Indoor air quality is crucial for a healthy and comfortable living environment. The Thielmann Group offers several indoor air quality solutions to address your specific needs, including:
- Air purifiers: Improve air quality by removing allergens, dust, and pollutants.
- Humidifiers: Maintain optimal humidity levels for better comfort and health.
- Dehumidifiers: Prevent excess moisture and mold growth in your home.
- Duct cleaning: Remove contaminants from your ductwork for cleaner air.
Breathe easier with our top-rated indoor air quality services. Request IAQ services for your home by calling us at (262) 299-6197 today!
Professional Plumbing Services in Hartford, WI
Your home’s plumbing system is one of the most important, yet often forgotten, systems in your house. When plumbing problems arise, they can turn from inconvenient to down right dirty in seconds. Having a reliable team of Hartford plumbers on your speed dial can make all the difference. Thielmann Heating, Cooling, and Plumbing has been serving homeowners since 1929. This means we understand what your home needs and treat each problem with professional, quality workmanship.
Our trained, certified team of plumbers in Hartford are able to handle everything from new fixture installations to major pipe repairs, and everything in between. For Hartford, WI homeowners needing fast, reliable plumbing services, Thielmann offers:
- Water Heater repair and replacement that ensure you always have hot water
- Drain cleaning to clear buildup and remove clogs
- Kitchen faucet, sink, and garbage disposal installation and service
- Bathroom fixtures and toilet repair and installation
- Minimally invasive pipe repair and replacement to improve water pressure
- Sump pump services to ensure a dry, safe basement.
Water Conditioning in Hartford, WI
For residents in Hartford, WI, hard water can damage your home’s plumbing system and shorten the life of your appliances. That’s why Thielmann Heating, Cooling, and Plumbing offers complete water conditioning services designed to help you protect your home. Our team will test your home’s water to help you make the best decision and find the right solution. After all, the cleaner your water, the better you feel when bathing, cleaning, and cooking.
Why Choose The Thielmann Group in Hartford?
The Thielmann Group is proud to be the trusted choice for reliable HVAC and indoor air quality solutions throughout Hartford and the surrounding area. When you choose our team, you can always count on us for:
- NATE-certified, background-checked technicians
- Free replacement estimates
- Upfront, honest pricing
- Flexible financing options
Don’t compromise on comfort and safety in your home. Choose The Thielmann Group and experience superior service that ensures your home remains a haven of comfort and health.
Call (262) 299-6197 to schedule HVAC or IAQ services in Hartford today!
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 Hartford, WI
Job Locations and Reviews
Performed tune-up service on HVAC system with inspection of heat exchanger components and refrigeration lines. Noted minor corrosion on heat exchanger tubes and identified a frozen/iced condensate trap. Cleaned corroded areas, thawed and cleared blocked condensate drain assembly, and verified proper system operation after service. System now functioning within normal parameters.
Responded to no heat call for Goodman furnace installed in basement. Performed diagnostic inspection revealing issues with exhaust venting system. Adjusted PVC pipe connections to ensure proper ventilation, checked electrical connections, and restored system functionality. Confirmed proper operation before completing service.
Inspected HVAC system with focus on blower assembly. Identified motor with blue dot marker requiring attention. Examined connections including wiring (green, yellow) and black pipes/tubing. Verified proper mounting of components on metal frame and checked security of brackets and fasteners. No operational issues detected during inspection.
Conducted comprehensive gas pressure test on residential plumbing system. Inspected metal ductwork connections and copper gas lines for potential leaks. Located and sealed minor leak at copper pipe fitting near ductwork junction, and verified proper operation of PVC venting system. Final pressure test confirmed system integrity with no remaining leaks present.
Conducted comprehensive HVAC tune-up inspection on unit greater than 10 years old. Inspected basement infrastructure including ductwork, PVC piping, and electrical connections. Verified proper leveling of equipment components using precision level tool, ensuring optimal system operation and efficiency.
Performed preventative maintenance tune-up on HVAC system. Opened access panel to inspect electrical connections and wiring integrity across all components. Verified level installation of unit with bubble level tool to ensure proper operation and drainage.
Conducted preventive tune-up on HVAC system. Verified level installation of equipment using precision level tool and inspected plumbing connections in basement ceiling area, including PVC drain lines and associated ductwork. All components operating within normal parameters.
Performed interior inspection of furnace unit, removed access panel and examined key components including motor, electrical connections, and blower assembly. Visual inspection revealed dust accumulation on internal components, suggesting routine maintenance was required. Cleaned accessible components and verified proper electrical connections among the colored wiring (white, orange, blue, and black) to ensure optimal system operation.
Conducted inspection of existing HVAC system in basement utility room, including furnace unit with vertical configuration and adjacent water heater. Examined plumbing infrastructure consisting of PVC drainage pipes and red supply lines mounted to ceiling joists, providing client with replacement options based on assessment findings.
Completed prepaid maintenance service on residential HVAC system including Aprilaire humidifier in basement mechanical room. Performed visual inspection of furnace, air handler, ductwork connections, and refrigerant lines. Checked digital control panel functionality and system operation with diagnostic equipment to ensure all components operating within specifications.
Performed scheduled maintenance on Lennox HVAC system including leveling of ductwork and inspection of control board circuitry. Verified proper connection of all control wiring terminals (white, yellow, blue, red, and black) and confirmed normal operation of digital display showing "0" reading. All flame sense components and drive mechanisms functioning correctly with no issues identified.
Responded to a no-heat service call on an aging HVAC system (10+ years). Diagnosed failed blower motor as the cause of heating failure. Removed and replaced the blower motor assembly, rewired electrical connections to factory specifications, and verified proper system operation. System now functioning normally with restored heat output.
Inspected attic HVAC ductwork system. Observed standard metal ducts with reflective insulation in good working condition, supported by structural beams. Noted some disturbed fiberglass insulation between floor joists requiring adjustment for optimal system efficiency.
Conducted inspection of furnace unit located in basement utility area. Observed unit placement against unfinished wall with exposed wooden studs. Noted visible moisture staining on concrete floor surrounding equipment that requires monitoring. All connections and tubing appear intact with no immediate service requirements identified.
Performed comprehensive tune-up service on basement HVAC system, inspecting all visible plumbing connections and drainage pipes. Examined ceiling-mounted ductwork, checked light fixture operation, and verified proper insulation around mechanical components.
Conducted inspection of existing HVAC system requiring replacement. Documented water damage around floor drain in utility area indicating potential drainage issues. Observed exterior condenser unit properly winterized with protective plastic covering. Recommended complete system replacement to address water damage concerns and improve overall efficiency.
Conducted inspection and maintenance on older model furnace in unfinished utility room. Tools and diagnostic equipment were used to assess system condition. Customer's unit will require follow-up service due to age-related wear observed on internal components.
Performed comprehensive tune-up on residential HVAC system including inspection of internal components and electrical connections. Checked unit for proper leveling to ensure optimal operation. All systems verified to be functioning within normal parameters.
Completed HVAC system tune-up including inspection of furnace interior components. Checked blower motor assembly, electrical connections, and drainage system. Verified system leveling to ensure proper operation and efficiency of the unit.
Performed complete tune-up on HVAC system. Inspected interior components including wiring connections, copper lines, and drainage assembly. Confirmed unit is properly leveled using precision tools, ensuring optimal operation and efficiency.