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
Successfully installed a 50-gallon residential water heater with blue expansion tank, connected via copper piping and brass fittings. All plumbing connections were properly secured and the unit was positioned in the utility room alongside existing HVAC equipment, with installation completed per manufacturer specifications.
Responded to no-cooling call where AC unit tripped breaker and would not restart. Upon arrival, discovered outdoor disconnect box severely compromised with extensive rodent nesting material, dried vegetation, and debris accumulation throughout electrical compartment. Evidence of electrical arcing and heat damage observed on wiring insulation mixed with nesting materials. Cleared all debris from disconnect, inspected wiring for damage, and verified electrical connections. Reset breaker and confirmed system operational. Advised property owner that outdoor electrical enclosure requires ongoing monitoring to prevent future pest intrusion and recommended sealing entry points to protect electrical components.
Completed installation of Bradford White tanked water heater in basement utility area. Installed new unit with proper plumbing connections including copper piping with soldered joints, brass fittings, and shut-off valve. Mounted blue expansion tank on wall and connected to system per manufacturer specifications. Verified all connections, tested system operation, and ensured compliance with plumbing codes and safety requirements.
Responded to service call for air conditioning system with non-operational blower. Performed diagnostic evaluation of the HVAC system and measured supply air temperature at 51.43°F to assess cooling performance. Diagnosed blower motor failure preventing air circulation through the ductwork, completed necessary repairs to restore proper system operation and airflow.
Completed scheduled cooling system maintenance visit as part of recurring membership agreement. Performed comprehensive inspection and preventive maintenance on residential HVAC system, including Lennox furnace unit located in basement utility area and outdoor condenser unit. Verified proper operation of all system components, checked refrigerant levels, inspected electrical connections, cleaned condenser coils, and confirmed adequate airflow through both indoor and outdoor units. All equipment found to be operating within normal parameters with no immediate service needs identified.
Responded to leaking outdoor spigot complaint. Located source of leak at exterior hose bib connection point and traced supply line to shut-off valve in utility room. Inspected copper supply piping and gate valve assembly, confirmed proper valve operation, and verified all connections were secure to resolve the leak issue.
Completed comprehensive air conditioning tune-up service on residential split system. Performed full system inspection of outdoor condenser unit and indoor air handler components, including cleaning of coils, verification of refrigerant levels, electrical connections testing, and airflow measurements. All components found operating within manufacturer specifications with no deficiencies noted.
Responded to service call for non-recycling water softener experiencing calcium buildup and clogging issues. Performed diagnostic inspection of water treatment system and associated plumbing infrastructure including copper supply lines, PVC discharge piping, and control valve assembly. Evaluated system operability and documented current condition of equipment with photographic evidence showing piping configuration, mounting hardware, and overall installation setup in utility area.
Responded to call for water accumulation beneath furnace during AC operation. Upon inspection, discovered clogged condensate drain line causing water to overflow and pool on floor. Cleared blockage from drain line, verified proper drainage flow, and cleaned drain pan. Inspected drain trap and confirmed proper operation of condensate removal system.
Completed prepaid cooling system maintenance visit on residential AC unit. Performed standard system diagnostics using Fieldpiece SMAN refrigerant manifold and micron gauge to verify refrigerant pressures and system performance. All measured values were within normal operating parameters. Inspected outdoor condenser unit, confirmed proper operation of fan assembly, and verified electrical connections were secure. System operating efficiently with no issues identified.
Completed comprehensive A/C tune-up service including system inspection and refrigerant pressure verification. Utilized manifold gauge set to check refrigerant levels and system pressures, confirming proper operating parameters. All components inspected and system operating efficiently.
Performed annual air conditioning tune-up and system diagnostics. Connected refrigerant manifold gauges to measure system pressures and temperatures, verifying proper refrigerant charge levels, superheat, and subcooling readings to ensure optimal system performance and efficiency.
Responded to emergency AC service call and performed comprehensive system evaluation for replacement estimate. Documented existing electrical panel configuration showing dedicated furnace and AC circuits, and photographed current HVAC system access point with associated plumbing and mechanical connections to assess replacement requirements and provide accurate equipment sizing recommendations.
Completed prepaid membership cooling system maintenance visit on residential HVAC equipment. Performed comprehensive inspection of air handler unit located in attic space and associated equipment in basement utility area, including visual assessment of refrigerant lines, ductwork connections, and system components. Documented equipment condition through photographic records showing proper installation and operational status of both air handler and water heater systems.
Completed comprehensive furnace and air conditioning tune-up on Lennox HVAC system. Performed thorough inspection of indoor furnace unit with all panels opened to access internal components, checked electrical connections, refrigerant lines, and condensate drainage system. Inspected outdoor condensing unit, tested system operation, and verified proper airflow through fan assembly and ventilation louvers.
Completed annual tune-up on Lennox outdoor condensing unit. Unit exterior and coil surfaces showed heavy dirt and debris accumulation, which were cleaned during service. Verified operation of all components, checked refrigerant levels, and inspected electrical connections and service valves.
Responded to no cooling call on system that had previously frozen. Upon arrival, unit was off per customer request. Performed diagnostic evaluation using wireless manifold gauge to check refrigerant pressures and system temperatures. Readings indicated superheat of 6.34°F on suction side and subcooling of 87°F, with pressures of 312 PSIG and 1511 PSIG respectively. System temperatures showed 22°F evaporator temperature with liquid line temperature of 83.6°F and suction line temperature of 71.3°F. Inspected ductwork and copper refrigerant lines in mechanical space for restrictions or damage. Based on gauge readings and previous freezing condition, system shows signs of potential refrigerant flow issues or metering device malfunction requiring further evaluation when unit can be operated under normal conditions.
Completed annual tune-up maintenance on Daikin split system including indoor furnace unit and outdoor condensing unit. Performed comprehensive system inspection, verified proper operation of all components, checked refrigerant levels, cleaned condenser coils, inspected electrical connections, tested safety controls, and confirmed optimal airflow throughout the system.
Responded to no cooling complaint with loud buzzing sound from Bryant HVAC system. Upon arrival, performed diagnostic inspection of furnace and air handling components in basement utility area. Identified source of buzzing noise and resolved cooling issue, restoring normal system operation.
Replaced defective outdoor hose bib and associated shut-off valve due to active leaking. Installed new hose bib assembly with proper sealing and verified all connections are watertight and functioning correctly.