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
Recent Jobs and Reviews in Hartford, WI
Hartford, WI at a glance
Thielmann Heating, Cooling & Plumbing has completed 20 jobs in Hartford, WI in September 2026.
The most recent job was on September 25, 2026.
Job Locations and Reviews
Conducted on-site evaluation for complete HVAC system replacement including existing furnace, air conditioning unit, and potential water heater upgrade. Assessed current equipment configuration with furnace located in basement mechanical room, documented existing ductwork layout and spatial constraints, and evaluated feasibility of relocating furnace to optimize system performance and accessibility. Photographed existing gray furnace unit with connected ductwork system and outdoor white condenser unit with protective grille to document current installation conditions for replacement proposal development.
Completed full HVAC system installation including Carrier brand furnace and air conditioning unit. Installed furnace with proper venting using white PVC piping for condensate drain and combustion air intake/exhaust. Routed refrigerant lines (suction and liquid lines) and electrical connections from outdoor condensing unit to indoor air handler through exterior ground-level pathway. Secured all refrigerant lines with proper insulation and protection. Connected ductwork to plenum assembly and verified all mechanical and electrical connections at furnace control board. Work performed with required permits and licensed electrician coordination for electrical service connections. System installed in interior utility closet with outdoor condenser placement adjacent to building exterior. All components properly positioned and secured for optimal operation and future service accessibility.
Completed comprehensive tune-up service on both furnace and air conditioning systems for new homeowner. Performed standard maintenance procedures including system inspection, temperature diagnostics, and operational testing. Supply air temperature measured at 122.7°F on heating system and return air at 76°F, indicating proper temperature differential and system performance. Provided customer education on routine maintenance requirements including filter change intervals and system monitoring recommendations for first-time HVAC system owner.
Responded to water softener malfunction call and performed system inspection. Upon arrival, identified severely corroded inlet valve and pipe fitting at the base of the water softener unit, with heavy rust oxidation compromising the integrity of the connection point. Diagnosed the corrosion as the primary cause of the system issues, affecting water flow and softener operation. Documented equipment condition including the softener tank, brine tank assembly, and associated plumbing connections for repair recommendations and future service needs.
Completed comprehensive tune-up service on residential furnace and air conditioning system. Performed standard maintenance procedures including inspection of indoor furnace components, ductwork connections, and outdoor condensing unit. All equipment found operating within normal parameters with no issues identified during service visit.
Completed comprehensive tune-up service on residential air conditioning system and replaced Honeywell F100 16x25x4 media filter. Performed refrigerant pressure diagnostics using manifold gauge set to verify proper system charge and operation, inspected outdoor condenser unit for proper function, and ensured all components were operating within manufacturer specifications.
Completed comprehensive furnace tune-up including inspection of all internal components, electrical connections, control boards, and wiring systems. Verified proper operation of unit, checked gas connections and PVC venting system, and ensured all mechanical components were functioning within manufacturer specifications. Customer expressed interest in membership program for ongoing maintenance services.
Completed comprehensive furnace tune-up as part of prepaid membership heating maintenance visit. Performed standard seasonal inspection including temperature diagnostics with digital thermometer showing 71.2°F supply air reading, verified electrical connections and wiring integrity, and inspected all mechanical components and ductwork for proper operation and safety compliance.
Completed scheduled furnace tune-up and membership maintenance service. Performed comprehensive system diagnostics using digital multimeter to verify proper electrical operation, checked all control board connections and wiring integrity, and tested safety circuits to ensure unit is operating within manufacturer specifications.
Responded to frozen air conditioning system and performed fall tune-up service. Upon arrival, found evaporator coil heavily frosted with ice buildup, measuring supply temperatures of 124.5°F and return air at 77°F. Thawed frozen coil, completed comprehensive system inspection and tune-up, and restored unit to proper operating condition.
Completed comprehensive furnace tune-up and preventative maintenance inspection as part of recurring heating system membership agreement. Performed multi-point inspection of heating equipment, verified proper operation of all system components, and checked gas connections and venting in mechanical space. System found to be operating within manufacturer specifications with all safety controls functioning properly.
# HVAC Furnace Tune-Up and Combustion Analysis Performed comprehensive tune-up and safety inspection on residential natural gas furnace system. Conducted full combustion analysis using calibrated analyzer, confirming optimal performance with 94.9% efficiency and safe carbon monoxide levels at 19 PPM. Inspected burner assembly during active operation, verified proper ignition sequence and flame characteristics with hot surface igniter glowing appropriately. Examined gas valve operation, electrical connections, and control wiring throughout cabinet sections. Verified condensate drainage system and PVC venting connections for proper installation and function. Inspected blower compartment, ductwork connections, and refrigerant line routing. All components operating within manufacturer specifications with no immediate safety concerns identified.
Conducted boiler replacement estimate for existing unit currently operational but deteriorating and unlikely to survive upcoming heating season. Assessed basement installation area with exposed plumbing infrastructure including copper lines, PVC venting, and existing gas piping. Recommended high-efficiency boiler system without indirect water heater tank based on current configuration and customer requirements.
Installed new garbage disposal unit beneath kitchen sink per customer estimate. Connected disposal to existing sink drain flange and integrated unit with white PVC drain line configuration including P-trap assembly. Completed electrical connection via junction box with flexible metal conduit, secured all plumbing connections with appropriate fittings and clamps, and verified proper operation of the disposal system.
Completed full HVAC system installation including new furnace, air conditioning unit, F100 media air cleaner (16x25x4), and whole-home humidifier in residential basement utility room. All work performed with proper permits and electrical connections coordinated with licensed electrician. System installed, tested, and verified operational with all components properly integrated and secured per manufacturer specifications.
Performed routine maintenance and tune-up on residential air conditioning system. Connected diagnostic gauges to outdoor condenser unit to check refrigerant pressures and verify system operation within manufacturer specifications.
Responded to emergency furnace service call and conducted thorough assessment of existing HVAC system located in utility closet. Upon inspection, identified failed heat exchanger requiring immediate replacement due to safety concerns. Documented existing beige furnace unit with connected gray PVC ductwork and observed aged plumbing infrastructure with visible corrosion on copper piping and metal components. Provided comprehensive estimate for complete furnace replacement system to address heat exchanger failure and ensure safe, efficient operation of heating system.
Completed annual tune-up and maintenance on residential air conditioning and heating system. Performed comprehensive flue gas analysis on natural gas furnace using calibrated combustion analyzer, confirming optimal performance with efficiency reading of 93.6%, oxygen level at 10.5%, carbon monoxide at 8 ppm, and stack temperature of 96.5°F—all values within manufacturer specifications. Inspected outdoor heat pump unit, verifying proper electrical connections and wiring integrity across all control circuits. All system components operating within normal parameters with no deficiencies noted.
Completed prepaid heating maintenance visit on residential furnace system. Performed comprehensive diagnostic testing using combustion analyzer to verify proper gas combustion efficiency, oxygen levels, and carbon monoxide output within manufacturer specifications. All readings displayed normal operating parameters. Conducted thorough visual inspection of furnace cabinet interior, including blower assembly, control board functionality, refrigerant line connections, and electrical wiring integrity. Confirmed proper operation of all system components with no issues identified.
Completed scheduled furnace tune-up and preventive maintenance on Lennox heating system as part of recurring membership service. Performed comprehensive system inspection, replaced air filter, verified proper operation of all components, and documented equipment condition with photographs.
