Reliable Home Services In Franklin | Thielmann Heating And Cooling

Reliable Home Services in Franklin

At Thielmann Heating, Cooling, and Plumbing, we understand that your home is more than just a building; it’s where comfort, safety, and peace of mind come together. For over 90 years, we’ve proudly provided homeowners in Southeastern Wisconsin with reliable and innovative solutions tailored to their unique needs. From advanced heating systems to modern plumbing upgrades, we’re here to ensure your Franklin home runs efficiently all year long. Call us today at (262) 315-3067 and see why so many have turned to Thielmann’s home service solutions. 

Valuable Franklin Heating Solutions

Thielmann - Slinger - Install 18

Winters in Franklin are no match for our advanced heating services. Whether you need a new installation or expert maintenance, we have you covered with a wide range of reliable options:

  1. Heat Pumps: Embrace year-round comfort with versatile heat pump systems that provide both heating and cooling. These systems are an excellent choice for Franklin homeowners looking to reduce energy costs while maintaining a consistent indoor climate. Whether you need a new installation or a repair, our team ensures optimal performance tailored to your home’s needs.
  2. Boiler Services: Boilers are a popular choice for homes in Franklin due to their durability and efficiency. We offer comprehensive boiler services, including installations, repairs, and maintenance, ensuring your system operates safely and effectively for years to come.
  3. Furnace Maintenance and Replacement: Regular furnace maintenance is key to preventing breakdowns and extending the life of your system. If it’s time for an upgrade, our high-efficiency furnaces deliver powerful heating while reducing energy costs.
  4. Emergency Heating Repairs: A sudden heating issue can disrupt your life, especially during a Wisconsin winter. Our team is available to provide fast, effective repairs, restoring warmth to your home without delay.

Plumbing Services for Every Need

A dependable plumbing system is essential for a smooth-running household. At Thielmann Heating, Cooling, and Plumbing, we offer a comprehensive range of plumbing services to keep everything flowing smoothly and efficiently:

  • Tankless Water Heaters: Experience the luxury of endless hot water while saving energy with a tankless water heater. These compact and efficient systems are perfect for homes aiming to maximize utility and performance without taking up too much space.
  • Water Line Services: Leaks or aging water lines can cause significant issues over time. Using advanced detection tools, we locate and address problems quickly, ensuring uninterrupted water flow and preventing costly damage.
  • Modern Fixture Installations: Upgrade your bathroom or kitchen with state-of-the-art fixtures, including energy-efficient faucets, elegant sinks, and high-performance showerheads. Our installations are designed to enhance both style and functionality.
  • Sump Pump Solutions: Safeguard your basement from potential flooding with reliable sump pump services. From installations to routine maintenance, we ensure your pump is prepared to handle heavy rains and protect your home.

Efficient Cooling Services in Franklin

Thielmann - New Berlin - Install Truck 18

As the temperatures rise, having a dependable cooling system gives you the peace of mind you deserve. At Thielmann, we offer a comprehensive range of cooling solutions in Franklin designed to keep your home cool, comfortable, and efficient:

  • Central Air Conditioning: Upgrade to high-performance AC systems that deliver consistent cooling while lowering energy usage. Our technicians carefully assess your home’s size and layout to recommend the perfect system for your needs.
  • Zoned Cooling Solutions: Customize the temperature in different areas of your home with zoned cooling systems. These solutions improve comfort and energy efficiency by allowing you to cool specific rooms rather than the entire house.
  • Seasonal Maintenance: Regular maintenance is crucial for keeping your AC system running smoothly. Our tune-ups include inspections, cleaning, and adjustments to identify and address potential issues before they escalate.
  • Smart Thermostat Installation: Gain better control over your cooling system with smart thermostats. These devices allow you to adjust temperatures remotely, create schedules, and monitor energy usage, ensuring optimal comfort and efficiency.

Franklin Air Quality Specialists

Breathe easier with Thielmann’s advanced indoor air quality solutions. We provide tailored services to ensure the air inside your home is clean, refreshing, and safe for your family:

  • Air Filtration Systems: Remove allergens, dust, and airborne pollutants with high-performance air filters. These systems are particularly beneficial for households with pets or allergy sufferers.
  • Dehumidifiers and Humidifiers: Achieve the perfect balance of humidity in your home. Our dehumidifiers prevent mold and mildew during humid months, while our humidifiers combat dry air in winter, improving comfort and health.
  • Ventilation Upgrades: Proper ventilation is key to maintaining fresh air circulation throughout your home. We provide advanced solutions that reduce indoor pollutants and enhance overall air quality.
  • UV Light Purification: Eliminate harmful bacteria and viruses with UV purification systems. These devices work seamlessly with your HVAC system to create a safer living environment for your family.

Schedule Your Service in Franklin Today

Looking to improve your home’s comfort, energy efficiency, and safety? Contact Thielmann Heating, Cooling, and Plumbing today by calling (262) 315-3067 to arrange a service or consultation. Our experienced team is honored to provide Franklin homeowners with personalized solutions that exceed expectations.

Recent Jobs and Reviews in Franklin, WI

Franklin, WI at a glance

Thielmann Heating, Cooling & Plumbing has completed 20 jobs in Franklin, WI in October 2026.

The most recent job was on October 19, 2026.

Thielmann Heating, Cooling & Plumbing has completed 238 jobs in Franklin, WI in the last 12 months.

Job Locations and Reviews

Performed a whole-home plumbing inspection, including the basement sump pit and discharge piping, which has a check valve and shows staining and moisture on the surrounding masonry walls and floor. Inspected the gas-fired water heater and found rust-colored staining and dampness on the floor at the base of the tank, indicating a possible leak or condensation issue that warrants further evaluation. Recommend monitoring the sump system and having the water heater connections and tank condition assessed for repair or replacement.
Performed a whole-home plumbing inspection, including the basement sump pit and discharge piping, which has a check valve and shows staining and moisture on the surrounding masonry walls and floor. Inspected the gas-fired water heater and found rust-colored staining and dampness on the floor at the base of the tank, indicating a possible leak or condensation issue that warrants further evaluation. Recommend monitoring the sump system and having the water heater connections and tank condition assessed for repair or replacement.
Nick B.
Nick B. Checked in
Performed a whole-home plumbing inspection, including the basement sump pit and discharge piping, which has a check valve and shows staining and moisture on the surrounding masonry walls and floor. Inspected the gas-fired water heater and found rust-colored staining and dampness on the floor at the base of the tank, indicating a possible leak or condensation issue that warrants further evaluation. Recommend monitoring the sump system and having the water heater connections and tank condition assessed for repair or replacement.
Franklin, WI 53132
Responded to a no-heat call on a Carrier gas furnace and performed a diagnostic evaluation, inspecting the gas control valve, inducer blower motor, pressure switch, and associated wiring and venting. Used a clamp meter to test electrical components and isolate the cause of the heating failure.
Responded to a no-heat call on a Carrier gas furnace and performed a diagnostic evaluation, inspecting the gas control valve, inducer blower motor, pressure switch, and associated wiring and venting. Used a clamp meter to test electrical components and isolate the cause of the heating failure.
Todd H.
Todd H. Checked in
Responded to a no-heat call on a Carrier gas furnace and performed a diagnostic evaluation, inspecting the gas control valve, inducer blower motor, pressure switch, and associated wiring and venting. Used a clamp meter to test electrical components and isolate the cause of the heating failure.
Franklin, WI 53132
Responded to a no-heat call on a Carrier upright condensing furnace and performed an after-hours diagnostic. Inspected the blower compartment, control board, wiring harness, and motor module, with no visible damage or corrosion found, and checked the condensate drain and venting connections. Verified system operation to isolate the cause of the heating failure and restore service.
Responded to a no-heat call on a Carrier upright condensing furnace and performed an after-hours diagnostic. Inspected the blower compartment, control board, wiring harness, and motor module, with no visible damage or corrosion found, and checked the condensate drain and venting connections. Verified system operation to isolate the cause of the heating failure and restore service.
Todd H.
Todd H. Checked in
Responded to a no-heat call on a Carrier upright condensing furnace and performed an after-hours diagnostic. Inspected the blower compartment, control board, wiring harness, and motor module, with no visible damage or corrosion found, and checked the condensate drain and venting connections. Verified system operation to isolate the cause of the heating failure and restore service.
Franklin, WI 53132
Franklin, WI - Inspected a 14-year-old gas-fired water heater experiencing loss of hot water capacity, evaluating the tank, gas valve assembly, flue connection, and supply piping. No visible external rust, frost, or tank damage was observed. Documented the unit's condition with photographs and prepared an estimate for water heater replacement based on the unit's age and reduced performance.
Gabriel S.
Gabriel S. Checked in
Inspected a 14-year-old gas-fired water heater experiencing loss of hot water capacity, evaluating the tank, gas valve assembly, flue connection, and supply piping. No visible external rust, frost, or tank damage was observed. Documented the unit's condition with photographs and prepared an estimate for water heater replacement based on the unit's age and reduced performance.
Franklin, WI 53132
Performed an on-site estimate for replacement of an approximately 22-year-old 40-gallon water heater. Inspected the existing atmospheric-vent gas unit, noting the draft hood and galvanized flue connection, copper water supply lines with shutoff valve, and gas supply with shutoff, and found no visible leaks, corrosion, or damage. Documented the installation with photos to support replacement recommendations based on the unit's age.
Performed an on-site estimate for replacement of an approximately 22-year-old 40-gallon water heater. Inspected the existing atmospheric-vent gas unit, noting the draft hood and galvanized flue connection, copper water supply lines with shutoff valve, and gas supply with shutoff, and found no visible leaks, corrosion, or damage. Documented the installation with photos to support replacement recommendations based on the unit's age.
Nick B.
Nick B. Checked in
Performed an on-site estimate for replacement of an approximately 22-year-old 40-gallon water heater. Inspected the existing atmospheric-vent gas unit, noting the draft hood and galvanized flue connection, copper water supply lines with shutoff valve, and gas supply with shutoff, and found no visible leaks, corrosion, or damage. Documented the installation with photos to support replacement recommendations based on the unit's age.
Franklin, WI 53132
Performed a complete tune-up on the gas furnace, including inspection of the burners, wiring, and internal components with the lower access panel removed, and verified proper operation of the heating cycle. Reprogrammed the Lennox thermostat schedule to raise heating setpoints during daytime hours and lower them overnight. Installed a new 16x25 media air filter in the filter cabinet to ensure adequate airflow and filtration.
Performed a complete tune-up on the gas furnace, including inspection of the burners, wiring, and internal components with the lower access panel removed, and verified proper operation of the heating cycle. Reprogrammed the Lennox thermostat schedule to raise heating setpoints during daytime hours and lower them overnight. Installed a new 16x25 media air filter in the filter cabinet to ensure adequate airflow and filtration.
George W.
George W. Checked in
Performed a complete tune-up on the gas furnace, including inspection of the burners, wiring, and internal components with the lower access panel removed, and verified proper operation of the heating cycle. Reprogrammed the Lennox thermostat schedule to raise heating setpoints during daytime hours and lower them overnight. Installed a new 16x25 media air filter in the filter cabinet to ensure adequate airflow and filtration.
Franklin, WI 53132
Performed an on-site evaluation for replacement of a 20+ year old natural gas furnace and matching air conditioning system, with the furnace located in the basement and previously shut down due to a failed heat exchanger. Inspected the furnace cabinet, burner and inducer assembly, control components, PVC venting, and existing ductwork transitions, noting corrosion near the inducer motor, and documented conditions with photos to prepare a same-day replacement estimate.
Performed an on-site evaluation for replacement of a 20+ year old natural gas furnace and matching air conditioning system, with the furnace located in the basement and previously shut down due to a failed heat exchanger. Inspected the furnace cabinet, burner and inducer assembly, control components, PVC venting, and existing ductwork transitions, noting corrosion near the inducer motor, and documented conditions with photos to prepare a same-day replacement estimate.
Chris M.
Chris M. Checked in
Performed an on-site evaluation for replacement of a 20+ year old natural gas furnace and matching air conditioning system, with the furnace located in the basement and previously shut down due to a failed heat exchanger. Inspected the furnace cabinet, burner and inducer assembly, control components, PVC venting, and existing ductwork transitions, noting corrosion near the inducer motor, and documented conditions with photos to prepare a same-day replacement estimate.
Franklin, WI 53132
Installed a new upflow gas furnace with a new F100 cabinet and connected it to the existing supply plenum and ductwork. Adapted the combustion air/vent piping to the existing PVC, reconnected the gas line, and installed a new S40 thermostat. Electrical connections were completed by a licensed electrician under permit, and the system was started up and verified for proper operation.
Installed a new upflow gas furnace with a new F100 cabinet and connected it to the existing supply plenum and ductwork. Adapted the combustion air/vent piping to the existing PVC, reconnected the gas line, and installed a new S40 thermostat. Electrical connections were completed by a licensed electrician under permit, and the system was started up and verified for proper operation.
Derik B.
Derik B. Checked in
Installed a new upflow gas furnace with a new F100 cabinet and connected it to the existing supply plenum and ductwork. Adapted the combustion air/vent piping to the existing PVC, reconnected the gas line, and installed a new S40 thermostat. Electrical connections were completed by a licensed electrician under permit, and the system was started up and verified for proper operation.
Franklin, WI 53132
Installed a new Carrier Infinity-series furnace with a PCV (polypropylene concentric vent) venting system and an Infinity communicating thermostat, along with an AA700M coil/air handler component. Verified proper gas supply and operation by taking manometer readings at the unit, confirming a stable pressure reading of 1.65 and a zeroed baseline, and completed system startup and checkout per manufacturer specifications.
Installed a new Carrier Infinity-series furnace with a PCV (polypropylene concentric vent) venting system and an Infinity communicating thermostat, along with an AA700M coil/air handler component. Verified proper gas supply and operation by taking manometer readings at the unit, confirming a stable pressure reading of 1.65 and a zeroed baseline, and completed system startup and checkout per manufacturer specifications.
Ron B.
Ron B. Checked in
Installed a new Carrier Infinity-series furnace with a PCV (polypropylene concentric vent) venting system and an Infinity communicating thermostat, along with an AA700M coil/air handler component. Verified proper gas supply and operation by taking manometer readings at the unit, confirming a stable pressure reading of 1.65 and a zeroed baseline, and completed system startup and checkout per manufacturer specifications.
Franklin, WI 53132
Performed a seasonal tune-up and safety inspection on a Bryant gas furnace, including visual inspection of the cabinet, condensate/PVC venting, and connections, with no signs of rust, frost, or damage. Verified heating operation by measuring supply duct surface temperature at 140.1°F with a digital pocket thermometer, confirming proper heat output. Unit left in good working order with service sticker applied.
Performed a seasonal tune-up and safety inspection on a Bryant gas furnace, including visual inspection of the cabinet, condensate/PVC venting, and connections, with no signs of rust, frost, or damage. Verified heating operation by measuring supply duct surface temperature at 140.1°F with a digital pocket thermometer, confirming proper heat output. Unit left in good working order with service sticker applied.
Ron B.
Ron B. Checked in
Performed a seasonal tune-up and safety inspection on a Bryant gas furnace, including visual inspection of the cabinet, condensate/PVC venting, and connections, with no signs of rust, frost, or damage. Verified heating operation by measuring supply duct surface temperature at 140.1°F with a digital pocket thermometer, confirming proper heat output. Unit left in good working order with service sticker applied.
Franklin, WI 53132
Performed a tune-up on a Carrier gas furnace, including inspection of the unit, vent piping, and condensate drain components. Used a digital manometer to check pressure readings during operation. Noted a displaced condensate pump/drain pan assembly near the unit and documented its condition for follow-up.
Performed a tune-up on a Carrier gas furnace, including inspection of the unit, vent piping, and condensate drain components. Used a digital manometer to check pressure readings during operation. Noted a displaced condensate pump/drain pan assembly near the unit and documented its condition for follow-up.
Ron B.
Ron B. Checked in
Performed a tune-up on a Carrier gas furnace, including inspection of the unit, vent piping, and condensate drain components. Used a digital manometer to check pressure readings during operation. Noted a displaced condensate pump/drain pan assembly near the unit and documented its condition for follow-up.
Franklin, WI 53132
Franklin, WI - Responded to a warranty call regarding extended cooling times on a recently installed Lennox split system. Prior service had addressed a low refrigerant charge caused by additional lineset length not being compensated for at installation. Inspected the outdoor condenser unit and found it clean, level on its pad, and intact, with no frost, corrosion, or physical damage.
Adriel H.
Adriel H. Checked in
Responded to a warranty call regarding extended cooling times on a recently installed Lennox split system. Prior service had addressed a low refrigerant charge caused by additional lineset length not being compensated for at installation. Inspected the outdoor condenser unit and found it clean, level on its pad, and intact, with no frost, corrosion, or physical damage.
Franklin, WI 53132
Performed annual maintenance tune-up on Carrier Infinity gas furnace, including inspection of the cabinet, PVC intake/exhaust piping, gas supply line and shutoff valve, and control components. Removed corrosion and oxide buildup from the flame sensor using an abrasive pad to restore reliable flame signal detection and ensure proper burner operation. Unit powered on with status indicator light normal.
Performed annual maintenance tune-up on Carrier Infinity gas furnace, including inspection of the cabinet, PVC intake/exhaust piping, gas supply line and shutoff valve, and control components. Removed corrosion and oxide buildup from the flame sensor using an abrasive pad to restore reliable flame signal detection and ensure proper burner operation. Unit powered on with status indicator light normal.
Carlos R.
Carlos R. Checked in
Performed annual maintenance tune-up on Carrier Infinity gas furnace, including inspection of the cabinet, PVC intake/exhaust piping, gas supply line and shutoff valve, and control components. Removed corrosion and oxide buildup from the flame sensor using an abrasive pad to restore reliable flame signal detection and ensure proper burner operation. Unit powered on with status indicator light normal.
FRANKLIN, WI 53132
Completed furnace tune-up maintenance service. Inspected and serviced Honeywell gas valve assembly, verified all electrical connections and gas line fittings, and checked system operation. Replaced furnace filter with customer-supplied media and confirmed proper airflow through the system.
Completed furnace tune-up maintenance service. Inspected and serviced Honeywell gas valve assembly, verified all electrical connections and gas line fittings, and checked system operation. Replaced furnace filter with customer-supplied media and confirmed proper airflow through the system.
Carlos R.
Carlos R. Checked in
Completed furnace tune-up maintenance service. Inspected and serviced Honeywell gas valve assembly, verified all electrical connections and gas line fittings, and checked system operation. Replaced furnace filter with customer-supplied media and confirmed proper airflow through the system.
Franklin, WI 53132
Replaced OEM exhaust 90-degree boot assembly on Bryant furnace system. Removed failed boot component with deteriorated rubber coupling and installed new factory replacement part, securing with proper hose clamp. Verified proper fit and seal of exhaust connection to prevent potential flue gas leakage and ensure safe system operation.
Replaced OEM exhaust 90-degree boot assembly on Bryant furnace system. Removed failed boot component with deteriorated rubber coupling and installed new factory replacement part, securing with proper hose clamp. Verified proper fit and seal of exhaust connection to prevent potential flue gas leakage and ensure safe system operation.
Carlos R.
Carlos R. Checked in
Replaced OEM exhaust 90-degree boot assembly on Bryant furnace system. Removed failed boot component with deteriorated rubber coupling and installed new factory replacement part, securing with proper hose clamp. Verified proper fit and seal of exhaust connection to prevent potential flue gas leakage and ensure safe system operation.
Franklin, WI 53132
Responded to emergency furnace call where unit was previously shut down due to dangerous carbon monoxide levels detected at the heat exchanger. Performed comprehensive system evaluation and determined heat exchanger failure along with defective inducer motor, rendering the furnace unsafe for operation. Provided detailed replacement estimate for new furnace system and documented existing exhaust venting configuration with photographic evidence showing current PVC vent terminations at building exterior.
Responded to emergency furnace call where unit was previously shut down due to dangerous carbon monoxide levels detected at the heat exchanger. Performed comprehensive system evaluation and determined heat exchanger failure along with defective inducer motor, rendering the furnace unsafe for operation. Provided detailed replacement estimate for new furnace system and documented existing exhaust venting configuration with photographic evidence showing current PVC vent terminations at building exterior.
Dave V.
Dave V. Checked in
Responded to emergency furnace call where unit was previously shut down due to dangerous carbon monoxide levels detected at the heat exchanger. Performed comprehensive system evaluation and determined heat exchanger failure along with defective inducer motor, rendering the furnace unsafe for operation. Provided detailed replacement estimate for new furnace system and documented existing exhaust venting configuration with photographic evidence showing current PVC vent terminations at building exterior.
Franklin, WI 53132
Completed comprehensive furnace tune-up including full system inspection and performance verification. Performed visual inspection of ductwork, PVC condensate drain lines, and mechanical components, utilizing inspection camera to assess internal duct conditions and verify proper airflow pathways. All system components found operating within normal parameters with no issues identified.
Completed comprehensive furnace tune-up including full system inspection and performance verification. Performed visual inspection of ductwork, PVC condensate drain lines, and mechanical components, utilizing inspection camera to assess internal duct conditions and verify proper airflow pathways. All system components found operating within normal parameters with no issues identified.
Todd H.
Todd H. Checked in
Completed comprehensive furnace tune-up including full system inspection and performance verification. Performed visual inspection of ductwork, PVC condensate drain lines, and mechanical components, utilizing inspection camera to assess internal duct conditions and verify proper airflow pathways. All system components found operating within normal parameters with no issues identified.
Franklin, WI 53132
Completed comprehensive furnace tune-up and system diagnostics as requested. Performed temperature differential measurements using digital thermometer and conducted pressure testing with digital manometer to verify proper system operation and airflow balance.
Completed comprehensive furnace tune-up and system diagnostics as requested. Performed temperature differential measurements using digital thermometer and conducted pressure testing with digital manometer to verify proper system operation and airflow balance.
Ron B.
Ron B. Checked in
Completed comprehensive furnace tune-up and system diagnostics as requested. Performed temperature differential measurements using digital thermometer and conducted pressure testing with digital manometer to verify proper system operation and airflow balance.
Franklin, WI 53132
Completed scheduled furnace tune-up and preventative maintenance as part of recurring heating system membership service. Performed comprehensive inspection of blower motor assembly and squirrel cage fan, verified proper operation of all mechanical components, and replaced air filter to ensure optimal system performance and efficiency.
Completed scheduled furnace tune-up and preventative maintenance as part of recurring heating system membership service. Performed comprehensive inspection of blower motor assembly and squirrel cage fan, verified proper operation of all mechanical components, and replaced air filter to ensure optimal system performance and efficiency.
George W.
George W. Checked in
Completed scheduled furnace tune-up and preventative maintenance as part of recurring heating system membership service. Performed comprehensive inspection of blower motor assembly and squirrel cage fan, verified proper operation of all mechanical components, and replaced air filter to ensure optimal system performance and efficiency.
Franklin, WI 53132
Responded to emergency furnace call and conducted comprehensive equipment assessment. Upon inspection, identified critical failure conditions including severely rusted burner box assembly and compromised heat exchanger showing signs of deterioration. Documented existing system configuration consisting of gray cabinet-style furnace with white PVC venting, integrated humidifier unit, and associated air handling equipment in basement mechanical room. Provided detailed replacement estimate for complete furnace system due to unsafe operating conditions of primary heat exchanger and burner components that pose potential safety hazards and cannot be effectively repaired.
Responded to emergency furnace call and conducted comprehensive equipment assessment. Upon inspection, identified critical failure conditions including severely rusted burner box assembly and compromised heat exchanger showing signs of deterioration. Documented existing system configuration consisting of gray cabinet-style furnace with white PVC venting, integrated humidifier unit, and associated air handling equipment in basement mechanical room. Provided detailed replacement estimate for complete furnace system due to unsafe operating conditions of primary heat exchanger and burner components that pose potential safety hazards and cannot be effectively repaired.
Michael Y.
Michael Y. Checked in
Responded to emergency furnace call and conducted comprehensive equipment assessment. Upon inspection, identified critical failure conditions including severely rusted burner box assembly and compromised heat exchanger showing signs of deterioration. Documented existing system configuration consisting of gray cabinet-style furnace with white PVC venting, integrated humidifier unit, and associated air handling equipment in basement mechanical room. Provided detailed replacement estimate for complete furnace system due to unsafe operating conditions of primary heat exchanger and burner components that pose potential safety hazards and cannot be effectively repaired.
Franklin, WI 53132
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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.