HVAC & IAQ Services in Hartford, WI

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! 

HVAC technician performing a service on an outdoor AC unit

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!

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:

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

Job Locations and Reviews

Hartford, WI - Inspected customer's plumbing infrastructure in utility area, focusing on two PVC pipes with GelLine branding connected to what appears to be an HVAC or ventilation system. Completed standard tune-up procedures on equipment, ensuring proper connections and functionality of all components.
Nick K.
Nick K. Checked in
Inspected customer's plumbing infrastructure in utility area, focusing on two PVC pipes with GelLine branding connected to what appears to be an HVAC or ventilation system. Completed standard tune-up procedures on equipment, ensuring proper connections and functionality of all components.
Hartford, WI 53027
Performed comprehensive tune-up service on residential gas furnace installed in basement. Conducted thorough inspection of all internal components including control board, wiring connections, and exhaust system. Checked PVC venting pipes for proper installation and potential obstructions. Noted possible previous water leak near unit base; recommended monitoring for recurrence. All systems tested operational with no immediate concerns identified.
Performed comprehensive tune-up service on residential gas furnace installed in basement. Conducted thorough inspection of all internal components including control board, wiring connections, and exhaust system. Checked PVC venting pipes for proper installation and potential obstructions. Noted possible previous water leak near unit base; recommended monitoring for recurrence. All systems tested operational with no immediate concerns identified.
Nick K.
Nick K. Checked in
Performed comprehensive tune-up service on residential gas furnace installed in basement. Conducted thorough inspection of all internal components including control board, wiring connections, and exhaust system. Checked PVC venting pipes for proper installation and potential obstructions. Noted possible previous water leak near unit base; recommended monitoring for recurrence. All systems tested operational with no immediate concerns identified.
Hartford, WI 53027
Performed diagnostic inspection on ceiling-mounted Lennox HVAC unit in basement showing no heat operation. Unit appears to be 10+ years old with deteriorated components. Replaced faulty ignition assembly and cleaned flame sensor to restore proper heating function. System now operating within normal parameters with good heat output and proper cycling.
Performed diagnostic inspection on ceiling-mounted Lennox HVAC unit in basement showing no heat operation. Unit appears to be 10+ years old with deteriorated components. Replaced faulty ignition assembly and cleaned flame sensor to restore proper heating function. System now operating within normal parameters with good heat output and proper cycling.
Nicholas H.
Nicholas H. Checked in
Performed diagnostic inspection on ceiling-mounted Lennox HVAC unit in basement showing no heat operation. Unit appears to be 10+ years old with deteriorated components. Replaced faulty ignition assembly and cleaned flame sensor to restore proper heating function. System now operating within normal parameters with good heat output and proper cycling.
Hartford, WI 53027
Performed comprehensive tune-up on gas furnace system, including inspection of internal components (blower assembly, motor, gas valve, electrical connections) and verification of proper operation. Examined attached Space-Gard Air Cleaner to ensure optimal filtration. Inspected basement ceiling infrastructure for proper ventilation pathways and confirmed all PVC exhaust/intake pipes were correctly installed and free from obstructions.
Performed comprehensive tune-up on gas furnace system, including inspection of internal components (blower assembly, motor, gas valve, electrical connections) and verification of proper operation. Examined attached Space-Gard Air Cleaner to ensure optimal filtration. Inspected basement ceiling infrastructure for proper ventilation pathways and confirmed all PVC exhaust/intake pipes were correctly installed and free from obstructions.
Nicholas H.
Nicholas H. Checked in
Performed comprehensive tune-up on gas furnace system, including inspection of internal components (blower assembly, motor, gas valve, electrical connections) and verification of proper operation. Examined attached Space-Gard Air Cleaner to ensure optimal filtration. Inspected basement ceiling infrastructure for proper ventilation pathways and confirmed all PVC exhaust/intake pipes were correctly installed and free from obstructions.
Hartford, WI 53027
Completed furnace installation in utility room with adjacent water heater. Installed new gas valve regulator with proper copper line connection and conducted pressure testing to verify system integrity. Final inspection confirmed all electrical connections secure with proper ventilation through PVC piping system.
Completed furnace installation in utility room with adjacent water heater. Installed new gas valve regulator with proper copper line connection and conducted pressure testing to verify system integrity. Final inspection confirmed all electrical connections secure with proper ventilation through PVC piping system.
Hayden L.
Hayden L. Checked in
Completed furnace installation in utility room with adjacent water heater. Installed new gas valve regulator with proper copper line connection and conducted pressure testing to verify system integrity. Final inspection confirmed all electrical connections secure with proper ventilation through PVC piping system.
HARTFORD, WI 53027
Hartford, WI - Diagnosed no heat complaint on Lennox gas furnace (<10 years old) with Aprilaire air cleaner attached. Identified faulty flame sensor causing intermittent heating failure. Cleaned sensor contacts, tested system through multiple heating cycles, and verified proper operation restored.
Nicholas H.
Nicholas H. Checked in
Diagnosed no heat complaint on Lennox gas furnace (<10 years old) with Aprilaire air cleaner attached. Identified faulty flame sensor causing intermittent heating failure. Cleaned sensor contacts, tested system through multiple heating cycles, and verified proper operation restored.
Hartford, WI 53027
Performed comprehensive tune-up service on residential HVAC furnace unit. Opened access panel to conduct full diagnostic testing with multimeter on electrical components and inspected blower motor functionality. Checked PVC venting system and all connections for proper operation and sealed any potential leak points.
Performed comprehensive tune-up service on residential HVAC furnace unit. Opened access panel to conduct full diagnostic testing with multimeter on electrical components and inspected blower motor functionality. Checked PVC venting system and all connections for proper operation and sealed any potential leak points.
Nick K.
Nick K. Checked in
Performed comprehensive tune-up service on residential HVAC furnace unit. Opened access panel to conduct full diagnostic testing with multimeter on electrical components and inspected blower motor functionality. Checked PVC venting system and all connections for proper operation and sealed any potential leak points.
Hartford, WI 53027
Performed comprehensive HVAC tune-up on customer's furnace system. Inspected PVC intake and exhaust venting for proper installation and airflow, confirming no blockages or damage present. Visual assessment of ductwork connections showed proper sealing and no signs of air leakage at junction points.
Performed comprehensive HVAC tune-up on customer's furnace system. Inspected PVC intake and exhaust venting for proper installation and airflow, confirming no blockages or damage present. Visual assessment of ductwork connections showed proper sealing and no signs of air leakage at junction points.
Nick K.
Nick K. Checked in
Performed comprehensive HVAC tune-up on customer's furnace system. Inspected PVC intake and exhaust venting for proper installation and airflow, confirming no blockages or damage present. Visual assessment of ductwork connections showed proper sealing and no signs of air leakage at junction points.
Hartford, WI 53027
Hartford, WI - Performed comprehensive tune-up maintenance on residential HVAC system with furnace unit. Inspected internal components, controls, and wiring connections through open access panel. Checked PVC venting system and gas line with red valve handle for proper operation and safety compliance.
Nicholas H.
Nicholas H. Checked in
Performed comprehensive tune-up maintenance on residential HVAC system with furnace unit. Inspected internal components, controls, and wiring connections through open access panel. Checked PVC venting system and gas line with red valve handle for proper operation and safety compliance.
Hartford, WI 53027
Performed detailed inspection of existing furnace system with exposed internal components including control boards, blower motor, and electrical connections. Evaluated PVC exhaust/intake venting and adjacent plumbing installation. Prepared comprehensive replacement estimate for aging HVAC equipment to improve system reliability and efficiency.
Performed detailed inspection of existing furnace system with exposed internal components including control boards, blower motor, and electrical connections. Evaluated PVC exhaust/intake venting and adjacent plumbing installation. Prepared comprehensive replacement estimate for aging HVAC equipment to improve system reliability and efficiency.
Bryan P.
Bryan P. Checked in
Performed detailed inspection of existing furnace system with exposed internal components including control boards, blower motor, and electrical connections. Evaluated PVC exhaust/intake venting and adjacent plumbing installation. Prepared comprehensive replacement estimate for aging HVAC equipment to improve system reliability and efficiency.
HARTFORD, WI 53027
Completed installation of new furnace unit in basement area, which included integration with existing PVC ventilation system. Performed internal component inspection and verified proper electrical connections to control system. All systems tested and functioning correctly.
Completed installation of new furnace unit in basement area, which included integration with existing PVC ventilation system. Performed internal component inspection and verified proper electrical connections to control system. All systems tested and functioning correctly.
Branden B.
Branden B. Checked in
Completed installation of new furnace unit in basement area, which included integration with existing PVC ventilation system. Performed internal component inspection and verified proper electrical connections to control system. All systems tested and functioning correctly.
HARTFORD, WI 53027
Performed routine maintenance and inspection on basement-installed furnace system. Opened access panel to examine internal components including motor, control elements, and wiring. Checked/replaced blue air filter and inspected all ductwork connections in unfinished basement for proper installation and airflow efficiency.
Performed routine maintenance and inspection on basement-installed furnace system. Opened access panel to examine internal components including motor, control elements, and wiring. Checked/replaced blue air filter and inspected all ductwork connections in unfinished basement for proper installation and airflow efficiency.
Nick K.
Nick K. Checked in
Performed routine maintenance and inspection on basement-installed furnace system. Opened access panel to examine internal components including motor, control elements, and wiring. Checked/replaced blue air filter and inspected all ductwork connections in unfinished basement for proper installation and airflow efficiency.
HARTFORD, WI 53027
Performed comprehensive tune-up on residential HVAC system, focusing on furnace inspection in basement utility area. Examined exposed ductwork and PVC venting connections for proper installation and integrity. Inspected furnace internal components including wiring array and Honeywell control box, verifying proper electrical connections and operational status.
Performed comprehensive tune-up on residential HVAC system, focusing on furnace inspection in basement utility area. Examined exposed ductwork and PVC venting connections for proper installation and integrity. Inspected furnace internal components including wiring array and Honeywell control box, verifying proper electrical connections and operational status.
Nicholas H.
Nicholas H. Checked in
Performed comprehensive tune-up on residential HVAC system, focusing on furnace inspection in basement utility area. Examined exposed ductwork and PVC venting connections for proper installation and integrity. Inspected furnace internal components including wiring array and Honeywell control box, verifying proper electrical connections and operational status.
Hartford, WI 53027
Hartford, WI - Successfully installed a new furnace unit in utility room, properly connecting all PVC ventilation pipes and ensuring proper integration with existing water heater system. Unit was wrapped with reflective metallic insulation at the upper portion and all connections were secured and tested for optimal performance.
Hayden L.
Hayden L. Checked in
Successfully installed a new furnace unit in utility room, properly connecting all PVC ventilation pipes and ensuring proper integration with existing water heater system. Unit was wrapped with reflective metallic insulation at the upper portion and all connections were secured and tested for optimal performance.
Hartford, WI 53027
Responded to a no-heat call for aging furnace (10+ years). Upon inspection, found failed blower motor assembly causing system failure. Replaced blower motor component and verified proper electrical connections to control board. Cleaned accumulated dust from cabinet interior. System now operational with normal heating function restored. All connections and operation tested.
Responded to a no-heat call for aging furnace (10+ years). Upon inspection, found failed blower motor assembly causing system failure. Replaced blower motor component and verified proper electrical connections to control board. Cleaned accumulated dust from cabinet interior. System now operational with normal heating function restored. All connections and operation tested.
Nicholas H.
Nicholas H. Checked in
Responded to a no-heat call for aging furnace (10+ years). Upon inspection, found failed blower motor assembly causing system failure. Replaced blower motor component and verified proper electrical connections to control board. Cleaned accumulated dust from cabinet interior. System now operational with normal heating function restored. All connections and operation tested.
Hartford, WI 53027
Completed HVAC replacement with installation of a new Goodman furnace system in basement mechanical room. Installation included proper PVC venting, condensate line configuration, and connection to existing ductwork. All components were properly secured and installed according to manufacturer specifications with appropriate pipe supports and ventilation requirements.
Completed HVAC replacement with installation of a new Goodman furnace system in basement mechanical room. Installation included proper PVC venting, condensate line configuration, and connection to existing ductwork. All components were properly secured and installed according to manufacturer specifications with appropriate pipe supports and ventilation requirements.
Steven S.
Steven S. Checked in
Completed HVAC replacement with installation of a new Goodman furnace system in basement mechanical room. Installation included proper PVC venting, condensate line configuration, and connection to existing ductwork. All components were properly secured and installed according to manufacturer specifications with appropriate pipe supports and ventilation requirements.
HARTFORD, WI 53027
Responded to no-heat service call for furnace less than 10 years old. Upon inspection, determined burners were functioning properly with good blue flame pattern indicating appropriate gas combustion. Verified all electrical connections were secure and operational. No further issues identified; system now operating within normal parameters.
Responded to no-heat service call for furnace less than 10 years old. Upon inspection, determined burners were functioning properly with good blue flame pattern indicating appropriate gas combustion. Verified all electrical connections were secure and operational. No further issues identified; system now operating within normal parameters.
Nick K.
Nick K. Checked in
Responded to no-heat service call for furnace less than 10 years old. Upon inspection, determined burners were functioning properly with good blue flame pattern indicating appropriate gas combustion. Verified all electrical connections were secure and operational. No further issues identified; system now operating within normal parameters.
HARTFORD, WI 53027
Hartford, WI - Performed diagnostic assessment on aging HVAC system (10+ years old) with no heat complaint. Inspection revealed significant corrosion and rust on interior components, particularly the heat exchanger platform, and identified faulty electrical connections with worn wiring at the blower motor assembly. Cleaned critical components, restored proper electrical connections, and restored heating function.
Nicholas H.
Nicholas H. Checked in
Performed diagnostic assessment on aging HVAC system (10+ years old) with no heat complaint. Inspection revealed significant corrosion and rust on interior components, particularly the heat exchanger platform, and identified faulty electrical connections with worn wiring at the blower motor assembly. Cleaned critical components, restored proper electrical connections, and restored heating function.
Hartford, WI 53027
Responded to a no-heat call for an aging furnace (10+ years). Diagnostic inspection revealed flame sensing issues and worn ignition components evident in the control assembly. Replaced faulty flame sensor and cleaned ignition assembly to restore proper heat function. System now operating within normal parameters.
Responded to a no-heat call for an aging furnace (10+ years). Diagnostic inspection revealed flame sensing issues and worn ignition components evident in the control assembly. Replaced faulty flame sensor and cleaned ignition assembly to restore proper heat function. System now operating within normal parameters.
Nick K.
Nick K. Checked in
Responded to a no-heat call for an aging furnace (10+ years). Diagnostic inspection revealed flame sensing issues and worn ignition components evident in the control assembly. Replaced faulty flame sensor and cleaned ignition assembly to restore proper heat function. System now operating within normal parameters.
Hartford, WI 53027
Performed routine maintenance on Lennox HVAC system. Checked system temperature readings with UEi digital meter (85.0°F recorded), and inspected the Space-Gard Air Cleaner. All components functioning within normal parameters; no issues detected.
Performed routine maintenance on Lennox HVAC system. Checked system temperature readings with UEi digital meter (85.0°F recorded), and inspected the Space-Gard Air Cleaner. All components functioning within normal parameters; no issues detected.
Todd H.
Todd H. Checked in
Performed routine maintenance on Lennox HVAC system. Checked system temperature readings with UEi digital meter (85.0°F recorded), and inspected the Space-Gard Air Cleaner. All components functioning within normal parameters; no issues detected.
Hartford, WI 53027
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What To Expect

Discover the Thielmann Heating, Cooling & Plumbing Difference

Fully Licensed & Insured

Our experts have the expertise and training to deliver the highest quality services every time.

Trusted Since 1929

We have served Southeastern Wisconsin for nearly a century, so we understand the needs of our community.

Financing Available

We offer various options from financing partners to help you meet your specific needs and budget.

5-Star Customer Service

Thielmann Heating, Cooling & Plumbing promises five-star customer service with every interaction.

Committed to Excellence

We complete jobs quickly without compromising our commitment to excellence.

Satisfaction Guarantee

Our team is dedicated to ensuring your 100% satisfaction with every service we perform.

Fully Licensed & Insured

Our experts have the expertise and training to deliver the highest quality services every time.

Trusted Since 1929

We have served Southeastern Wisconsin for nearly a century, so we understand the needs of our community.

Financing Available

We offer various options from financing partners to help you meet your specific needs and budget.

5-Star Customer Service

Thielmann Heating, Cooling & Plumbing promises five-star customer service with every interaction.

Committed to Excellence

We complete jobs quickly without compromising our commitment to excellence.

Satisfaction Guarantee

Our team is dedicated to ensuring your 100% satisfaction with every service we perform.

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Our Reviews

See What Your Neighbors Are Saying

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…

De'Angelo T.

De'Angelo T.

Excellent team from start to finish. They were all very respectful of our property, as they promptly and professionally went about their task of installing a new air conditioner system. The system works very well, so far. It is also much quieter than the previous 40+…

Jerry W.

Jerry W.

Thielmann did a tremendous job replacing our Carrier furnace. They worked with us to make sure we were able to get the right product and even worked with Carrier on the issues we were seeing on our old furnace as it was failing sooner than it…

J. K.

J. K.

I've been using Thielmann Group for all my heating and air conditioning since I built my house 23 years ago. They have been great in emergency service and regular maintenance service. On time and very friendly staff. Would, and have, recommend them to anyone!

Paul K.

Paul K.

I have used Thielmann for both installation of a new furnace + A/C recently, but also an install of a ductless mini-split unit six years ago. I fully trust their brands and recommendations. I can't say enough of about this company. Every single person from administrative…

Christin C.

Christin C.