Trusted Heating, Cooling And Plumbing Services In Caledonia | Thielmann Heating And Cooling

Trusted Heating, Cooling and Plumbing Services in Caledonia

Thielmann - Shorewood - House 3

In Caledonia, keeping your home comfortable and running smoothly is important to maintaining your daily routine. At Thielmann Heating, Cooling, and Plumbing, we understand the unique needs of Southeastern Wisconsin and are committed to providing top-notch home services that ensure comfort, safety, and efficiency year-round. Whether you need a furnace repair, an upgraded cooling system, or plumbing services, we’re here to deliver solutions tailored to your home. Call us today at (262) 315-3067 or contact our team online for more information.

Caledonia Plumbing Services: Comprehensive Care for Your Home

 

Plumbing problems can quickly throw off your routine and wreak havoc on your home, but Thielmann Heating, Cooling, and Plumbing is ready to step in with dependable and efficient solutions. Our comprehensive plumbing services in Caledonia are designed to address every need, ensuring your home stays functional and stress-free:

  • Sump Pump Installation and Maintenance: Protect your basement from flooding with a reliable sump pump. We provide expert installation and routine maintenance to keep it functioning perfectly.
  • Leak Detection and Repair: Leaks can lead to extensive damage if left unchecked. We use specially-designed tools to locate and repair leaks promptly.
  • Fixture Upgrades: From faucets to toilets, we install high-quality fixtures to enhance the functionality and style of your kitchen or bathroom.
  • Water Heater Installation and Repair: Whether you need a traditional or tankless water heater, we install and service systems to ensure you always have hot water.
  • Water Filtration and Softening Systems: Enjoy clean, safe water with our customized water filtration and softening solutions that address Caledonia’s unique water quality challenges.

Cooling Services: Stay Cool in Caledonia

Southeastern Wisconsin summers bring heat and humidity, making a dependable air conditioning system essential for comfort. Thielmann provides an extensive array of cooling services to ensure your home stays refreshingly cool throughout the season:

AC Installation

Choosing the right air conditioning system is essential for maintaining a comfortable home. Our team helps you select the perfect system based on your home’s size, cooling needs, and energy efficiency goals. With expert installation, we ensure your system delivers optimal performance for years to come.

AC Repairs in Caledonia

If your air conditioner isn’t keeping up with the heat, our technicians are here to help. We provide fast, reliable repairs to restore your system’s performance and keep your home cool during the hottest months.

Preventative Maintenance

Routine maintenance is key to keeping your AC system in top condition. Our preventative maintenance services help prevent unexpected breakdowns, improve energy efficiency, and extend the life of your system.

Ductless Mini-Split Systems

For homes without traditional ductwork, ductless mini-split systems offer an excellent solution. These systems provide flexible, energy-efficient cooling options that can be tailored to your specific needs.

Caledonia Heating Services

Installed heat pump outside a Wisconsin home

When the frigid Wisconsin winters hit, a reliable heating system is essential to maintain your home’s comfort. At Thielmann, we offer a full suite of heating services designed to keep you cozy and ensure your system performs at its best:

  1. Heat Pump Services: Heat pumps offer dual functionality, providing both heating and cooling. We install, repair, and maintain these energy-efficient systems to ensure your comfort year-round.
  2. Furnace Installation and Replacement: Upgrade your heating system with an energy-efficient furnace that delivers reliable warmth. Our team helps you select the best option for your home and provides seamless installation.
  3. Furnace Repair and Maintenance: A malfunctioning furnace can leave you in the cold. Our technicians diagnose and repair heating issues quickly and offer routine maintenance to keep your system running at peak performance.
  4. Indoor Air Quality Solutions: Enhance your home’s air quality with humidifiers, air purifiers, and ventilation systems designed to improve comfort and health during the colder months.
  5. Boiler Services: Boilers are an excellent choice for consistent and even heating. We handle everything from new installations to expert repairs and maintenance.

Why Caledonia Homeowners Should Trust Thielmann

At Thielmann Heating, Cooling, and Plumbing, we’re dedicated to providing unmatched service and expertise to Caledonia residents. For more than 90 years, Southeastern Wisconsin has trusted us for our:

  • Experienced Technicians: Our licensed professionals bring years of expertise to every project, ensuring high-quality results you can depend on. From troubleshooting to complex installations, our team has the skills to tackle any challenge.
  • Top-Quality Products: We partner with industry-leading brands to offer durable, energy-efficient systems that stand the test of time. Our product offerings are designed to meet your home’s specific needs while delivering exceptional performance.
  • Tailored Solutions: Every home is unique, and we provide customized recommendations that address your specific needs and preferences. Our team works closely with you to ensure our solutions align with your lifestyle and budget.
  • Comprehensive Services: With expertise spanning heating, cooling and plumbing we’re your one-stop shop for home maintenance and repair. Our integrated approach simplifies home care, ensuring consistent quality and convenience.

Don’t Hesitate to Schedule your Service Call

Don’t let home comfort or system issues disrupt your routine. Contact Thielmann Heating, Cooling, and Plumbing today to schedule your service appointment in Caledonia. Our knowledgeable team is here to provide personalized solutions that keep your home comfortable, efficient, and safe all year long.

Call us at (262) 315-3067 or use our online contact form to get started. Experience the Thielmann difference—trusted service, reliable results.

Recent Jobs and Reviews in Caledonia, WI

Caledonia, WI at a glance

Thielmann Heating, Cooling & Plumbing has completed 20 jobs in Caledonia, WI between March 2026 and October 2026.

The most recent job was on October 13, 2026.

Thielmann Heating, Cooling & Plumbing has completed 31 jobs in Caledonia, WI in the last 12 months.

Job Locations and Reviews

Completed comprehensive tune-up on mid-efficiency gas boiler for homeowner new to the property. Performed standard maintenance procedures including inspection of all mechanical components, pressure gauge verification, electrical connections, piping systems, and expansion tank. Provided detailed orientation on thermostat operations and explained heating system controls to familiarize homeowner with equipment functionality.
Completed comprehensive tune-up on mid-efficiency gas boiler for homeowner new to the property. Performed standard maintenance procedures including inspection of all mechanical components, pressure gauge verification, electrical connections, piping systems, and expansion tank. Provided detailed orientation on thermostat operations and explained heating system controls to familiarize homeowner with equipment functionality.
Ron B.
Ron B. Checked in
Completed comprehensive tune-up on mid-efficiency gas boiler for homeowner new to the property. Performed standard maintenance procedures including inspection of all mechanical components, pressure gauge verification, electrical connections, piping systems, and expansion tank. Provided detailed orientation on thermostat operations and explained heating system controls to familiarize homeowner with equipment functionality.
Caledonia, WI 53108
Provided estimate for toilet replacement in residential bathroom. Customer has new fixture ready for installation. Assessed existing toilet condition and surrounding plumbing connections, noting deteriorated wall surface behind unit with visible moisture damage, cracking, and paint failure. Documented water supply line configuration and floor conditions for replacement procedure.
Provided estimate for toilet replacement in residential bathroom. Customer has new fixture ready for installation. Assessed existing toilet condition and surrounding plumbing connections, noting deteriorated wall surface behind unit with visible moisture damage, cracking, and paint failure. Documented water supply line configuration and floor conditions for replacement procedure.
Nick B.
Nick B. Checked in
Provided estimate for toilet replacement in residential bathroom. Customer has new fixture ready for installation. Assessed existing toilet condition and surrounding plumbing connections, noting deteriorated wall surface behind unit with visible moisture damage, cracking, and paint failure. Documented water supply line configuration and floor conditions for replacement procedure.
Caledonia, WI 53108
Completed comprehensive furnace tune-up on Lennox gas heating system. Performed full system inspection including burner assembly, flame sensor, heat exchanger, blower motor, and all safety controls. Verified proper combustion, cleaned components as needed, and confirmed all connections and venting are secure and functioning correctly.
Completed comprehensive furnace tune-up on Lennox gas heating system. Performed full system inspection including burner assembly, flame sensor, heat exchanger, blower motor, and all safety controls. Verified proper combustion, cleaned components as needed, and confirmed all connections and venting are secure and functioning correctly.
Carlos R.
Carlos R. Checked in
Completed comprehensive furnace tune-up on Lennox gas heating system. Performed full system inspection including burner assembly, flame sensor, heat exchanger, blower motor, and all safety controls. Verified proper combustion, cleaned components as needed, and confirmed all connections and venting are secure and functioning correctly.
Caledonia, WI 53108
Completed preventive maintenance tune-up on residential Lennox furnace system. Performed standard inspection procedures, checked all operational components, and documented equipment condition with photographic evidence showing the main furnace unit and internal components including heat exchanger and refrigerant lines.
Completed preventive maintenance tune-up on residential Lennox furnace system. Performed standard inspection procedures, checked all operational components, and documented equipment condition with photographic evidence showing the main furnace unit and internal components including heat exchanger and refrigerant lines.
Carlos R.
Carlos R. Checked in
Completed preventive maintenance tune-up on residential Lennox furnace system. Performed standard inspection procedures, checked all operational components, and documented equipment condition with photographic evidence showing the main furnace unit and internal components including heat exchanger and refrigerant lines.
CALEDONIA, WI 53108
Caledonia, WI - Completed scheduled furnace tune-up and maintenance as part of prepaid membership heating visit. Replaced heavily soiled 20x25x4 air filter with new unit, as the existing filters showed significant accumulation of dust and debris that was restricting airflow. Performed comprehensive system inspection and standard maintenance procedures to ensure optimal heating system performance for the season.
Carlos R.
Carlos R. Checked in
Completed scheduled furnace tune-up and maintenance as part of prepaid membership heating visit. Replaced heavily soiled 20x25x4 air filter with new unit, as the existing filters showed significant accumulation of dust and debris that was restricting airflow. Performed comprehensive system inspection and standard maintenance procedures to ensure optimal heating system performance for the season.
Caledonia, WI 53402
Responded to no heat call on unit displaying E122 error code. Upon arrival, performed diagnostic testing with multimeter which revealed low voltage reading of 94.8V at the control board, indicating a power supply issue. Inspected electrical junction box and control wiring connections. Found loose wire connections at terminal block which were causing intermittent power delivery to the system. Secured all wire connections at terminal block, verified proper wire nut connections, and confirmed all electrical connections were tight and properly seated. Restored power to unit, cleared error code, and verified system operation with proper voltage readings. Unit now heating normally with no error codes present.
Responded to no heat call on unit displaying E122 error code. Upon arrival, performed diagnostic testing with multimeter which revealed low voltage reading of 94.8V at the control board, indicating a power supply issue. Inspected electrical junction box and control wiring connections. Found loose wire connections at terminal block which were causing intermittent power delivery to the system. Secured all wire connections at terminal block, verified proper wire nut connections, and confirmed all electrical connections were tight and properly seated. Restored power to unit, cleared error code, and verified system operation with proper voltage readings. Unit now heating normally with no error codes present.
Carlos R.
Carlos R. Checked in
Responded to no heat call on unit displaying E122 error code. Upon arrival, performed diagnostic testing with multimeter which revealed low voltage reading of 94.8V at the control board, indicating a power supply issue. Inspected electrical junction box and control wiring connections. Found loose wire connections at terminal block which were causing intermittent power delivery to the system. Secured all wire connections at terminal block, verified proper wire nut connections, and confirmed all electrical connections were tight and properly seated. Restored power to unit, cleared error code, and verified system operation with proper voltage readings. Unit now heating normally with no error codes present.
Caledonia, WI 53108
Completed water heater replacement estimate for 25-year-old conventional tank unit currently in operation. Customer declined tankless option and preferred standard tank water heater replacement. Assessed existing installation including copper supply lines, pressure relief valve, venting configuration, and electrical connections to determine replacement specifications and requirements.
Completed water heater replacement estimate for 25-year-old conventional tank unit currently in operation. Customer declined tankless option and preferred standard tank water heater replacement. Assessed existing installation including copper supply lines, pressure relief valve, venting configuration, and electrical connections to determine replacement specifications and requirements.
Nick B.
Nick B. Checked in
Completed water heater replacement estimate for 25-year-old conventional tank unit currently in operation. Customer declined tankless option and preferred standard tank water heater replacement. Assessed existing installation including copper supply lines, pressure relief valve, venting configuration, and electrical connections to determine replacement specifications and requirements.
Caledonia, WI 53108
Completed preventive maintenance tune-up on Goodman brand air conditioning system. Performed standard inspection of outdoor condenser unit, verified proper operation of all components, and inspected indoor air filtration system. All equipment found to be operating within normal parameters.
Completed preventive maintenance tune-up on Goodman brand air conditioning system. Performed standard inspection of outdoor condenser unit, verified proper operation of all components, and inspected indoor air filtration system. All equipment found to be operating within normal parameters.
Carlos R.
Carlos R. Checked in
Completed preventive maintenance tune-up on Goodman brand air conditioning system. Performed standard inspection of outdoor condenser unit, verified proper operation of all components, and inspected indoor air filtration system. All equipment found to be operating within normal parameters.
Caledonia, WI 53108
Completed comprehensive tune-up maintenance on two residential furnace systems, one located in the basement and one in the garage attic space. Performed standard maintenance procedures including inspection of all mechanical and electrical components, testing of capacitor functionality using digital multimeter which showed proper readings, verification of ignition system operation, and examination of heat exchanger condition. Replaced air filter media and confirmed proper venting system integrity on both units, with all systems operating within manufacturer specifications upon completion.
Completed comprehensive tune-up maintenance on two residential furnace systems, one located in the basement and one in the garage attic space. Performed standard maintenance procedures including inspection of all mechanical and electrical components, testing of capacitor functionality using digital multimeter which showed proper readings, verification of ignition system operation, and examination of heat exchanger condition. Replaced air filter media and confirmed proper venting system integrity on both units, with all systems operating within manufacturer specifications upon completion.
George W.
George W. Checked in
Completed comprehensive tune-up maintenance on two residential furnace systems, one located in the basement and one in the garage attic space. Performed standard maintenance procedures including inspection of all mechanical and electrical components, testing of capacitor functionality using digital multimeter which showed proper readings, verification of ignition system operation, and examination of heat exchanger condition. Replaced air filter media and confirmed proper venting system integrity on both units, with all systems operating within manufacturer specifications upon completion.
Caledonia, WI 53402
Completed scheduled heating maintenance visit on residential HVAC system. Performed electrical diagnostics using digital multimeter, obtaining readings to verify proper system operation and component functionality. Accessed furnace compartment to inspect internal components including blower assembly, motor, gas valve, control wiring, and associated electrical connections. All components found operating within normal parameters and system tested successfully upon completion.
Completed scheduled heating maintenance visit on residential HVAC system. Performed electrical diagnostics using digital multimeter, obtaining readings to verify proper system operation and component functionality. Accessed furnace compartment to inspect internal components including blower assembly, motor, gas valve, control wiring, and associated electrical connections. All components found operating within normal parameters and system tested successfully upon completion.
George W.
George W. Checked in
Completed scheduled heating maintenance visit on residential HVAC system. Performed electrical diagnostics using digital multimeter, obtaining readings to verify proper system operation and component functionality. Accessed furnace compartment to inspect internal components including blower assembly, motor, gas valve, control wiring, and associated electrical connections. All components found operating within normal parameters and system tested successfully upon completion.
Caledonia, WI 53108
Completed scheduled heating maintenance visit as part of recurring membership agreement. Performed system inspection of furnace components including blower motor assembly and heat exchanger, verified proper operation with supply air temperature reading of 198°F, and documented equipment condition through photographic records.
Completed scheduled heating maintenance visit as part of recurring membership agreement. Performed system inspection of furnace components including blower motor assembly and heat exchanger, verified proper operation with supply air temperature reading of 198°F, and documented equipment condition through photographic records.
Carlos R.
Carlos R. Checked in
Completed scheduled heating maintenance visit as part of recurring membership agreement. Performed system inspection of furnace components including blower motor assembly and heat exchanger, verified proper operation with supply air temperature reading of 198°F, and documented equipment condition through photographic records.
CALEDONIA, WI 53108
Completed furnace tune-up and air conditioning tune-up on split HVAC system. Inspected capacitor, blower motor, control boards, and electrical connections; verified proper operation of all components. Customer requires air filter replacement at sizes 1-3 PM Taylor specification.
Completed furnace tune-up and air conditioning tune-up on split HVAC system. Inspected capacitor, blower motor, control boards, and electrical connections; verified proper operation of all components. Customer requires air filter replacement at sizes 1-3 PM Taylor specification.
Todd H.
Todd H. Checked in
Completed furnace tune-up and air conditioning tune-up on split HVAC system. Inspected capacitor, blower motor, control boards, and electrical connections; verified proper operation of all components. Customer requires air filter replacement at sizes 1-3 PM Taylor specification.
Caledonia, WI 53108
Completed installation of new Carrier air conditioning condenser unit with matching evaporator coil and 15-foot refrigerant line set. The outdoor condenser was mounted on a composite pad against the building exterior with proper clearances, and copper refrigerant lines were routed along the siding to connect with the indoor evaporator coil installed above the existing furnace in the basement. All electrical connections, refrigerant lines, and condensate drainage were completed per manufacturer specifications, and the system was charged, tested, and verified operational.
Completed installation of new Carrier air conditioning condenser unit with matching evaporator coil and 15-foot refrigerant line set. The outdoor condenser was mounted on a composite pad against the building exterior with proper clearances, and copper refrigerant lines were routed along the siding to connect with the indoor evaporator coil installed above the existing furnace in the basement. All electrical connections, refrigerant lines, and condensate drainage were completed per manufacturer specifications, and the system was charged, tested, and verified operational.
James P.
James P. Checked in
Completed installation of new Carrier air conditioning condenser unit with matching evaporator coil and 15-foot refrigerant line set. The outdoor condenser was mounted on a composite pad against the building exterior with proper clearances, and copper refrigerant lines were routed along the siding to connect with the indoor evaporator coil installed above the existing furnace in the basement. All electrical connections, refrigerant lines, and condensate drainage were completed per manufacturer specifications, and the system was charged, tested, and verified operational.
Caledonia, WI 53108
Completed preventative maintenance tune-ups on two residential air conditioning systems. Performed comprehensive system diagnostics including electrical testing with digital multimeter, verified voltage readings at 244V, inspected contactors and electrical connections within disconnect boxes, and evaluated refrigerant line integrity. All components tested within normal operating parameters and systems cleared for continued operation.
Completed preventative maintenance tune-ups on two residential air conditioning systems. Performed comprehensive system diagnostics including electrical testing with digital multimeter, verified voltage readings at 244V, inspected contactors and electrical connections within disconnect boxes, and evaluated refrigerant line integrity. All components tested within normal operating parameters and systems cleared for continued operation.
Carlos R.
Carlos R. Checked in
Completed preventative maintenance tune-ups on two residential air conditioning systems. Performed comprehensive system diagnostics including electrical testing with digital multimeter, verified voltage readings at 244V, inspected contactors and electrical connections within disconnect boxes, and evaluated refrigerant line integrity. All components tested within normal operating parameters and systems cleared for continued operation.
Caledonia, WI 53402
Completed on-site assessment for HVAC system replacement in residential basement utility area. Evaluated existing Carrier furnace/air handler unit, associated ductwork, and available installation space. Documented current equipment configuration, clearances, and mechanical room conditions including water heater proximity, storage constraints, and existing PVC venting arrangement. Photographed equipment access points and utility connections to develop comprehensive replacement estimate.
Completed on-site assessment for HVAC system replacement in residential basement utility area. Evaluated existing Carrier furnace/air handler unit, associated ductwork, and available installation space. Documented current equipment configuration, clearances, and mechanical room conditions including water heater proximity, storage constraints, and existing PVC venting arrangement. Photographed equipment access points and utility connections to develop comprehensive replacement estimate.
Dave V.
Dave V. Checked in
Completed on-site assessment for HVAC system replacement in residential basement utility area. Evaluated existing Carrier furnace/air handler unit, associated ductwork, and available installation space. Documented current equipment configuration, clearances, and mechanical room conditions including water heater proximity, storage constraints, and existing PVC venting arrangement. Photographed equipment access points and utility connections to develop comprehensive replacement estimate.
CALEDONIA, WI 53108
Performed comprehensive AC tune-up on Carrier condenser unit, including system inspection and performance verification. Supply air temperature measured at 59.5°F, confirming proper cooling operation and system functionality.
Performed comprehensive AC tune-up on Carrier condenser unit, including system inspection and performance verification. Supply air temperature measured at 59.5°F, confirming proper cooling operation and system functionality.
Carlos R.
Carlos R. Checked in
Performed comprehensive AC tune-up on Carrier condenser unit, including system inspection and performance verification. Supply air temperature measured at 59.5°F, confirming proper cooling operation and system functionality.
CALEDONIA, WI 53108
Conducted estimate for replacement of existing attic-mounted air handler unit. Inspected current equipment and attic installation conditions, documenting electrical panel configuration with main disconnect and circuit breaker arrangement, as well as existing ductwork layout including black flexible ducts and silver reflective insulation materials. Provided mid-range equipment replacement options to meet customer requirements for reliable performance without premium-tier pricing.
Conducted estimate for replacement of existing attic-mounted air handler unit. Inspected current equipment and attic installation conditions, documenting electrical panel configuration with main disconnect and circuit breaker arrangement, as well as existing ductwork layout including black flexible ducts and silver reflective insulation materials. Provided mid-range equipment replacement options to meet customer requirements for reliable performance without premium-tier pricing.
Dave V.
Dave V. Checked in
Conducted estimate for replacement of existing attic-mounted air handler unit. Inspected current equipment and attic installation conditions, documenting electrical panel configuration with main disconnect and circuit breaker arrangement, as well as existing ductwork layout including black flexible ducts and silver reflective insulation materials. Provided mid-range equipment replacement options to meet customer requirements for reliable performance without premium-tier pricing.
Caledonia, WI 53108
Conducted comprehensive assessment of existing HVAC system in residential basement mechanical room. Evaluated aging furnace/air handler unit showing significant wear, surface deterioration, and outdated components with exposed internal wiring and mechanical systems. Documented current equipment configuration including ductwork layout, ventilation piping, and electrical connections to provide accurate replacement specifications and system upgrade recommendations.
Conducted comprehensive assessment of existing HVAC system in residential basement mechanical room. Evaluated aging furnace/air handler unit showing significant wear, surface deterioration, and outdated components with exposed internal wiring and mechanical systems. Documented current equipment configuration including ductwork layout, ventilation piping, and electrical connections to provide accurate replacement specifications and system upgrade recommendations.
Michael Y.
Michael Y. Checked in
Conducted comprehensive assessment of existing HVAC system in residential basement mechanical room. Evaluated aging furnace/air handler unit showing significant wear, surface deterioration, and outdated components with exposed internal wiring and mechanical systems. Documented current equipment configuration including ductwork layout, ventilation piping, and electrical connections to provide accurate replacement specifications and system upgrade recommendations.
Caledonia, WI 53108
Caledonia, WI - Responded to no heat call on residential HVAC system less than 10 years old. Upon arrival, performed diagnostic testing using digital multimeter which revealed supply voltage reading of 240V and temperature measurement of 55.4°F at the equipment. Identified and resolved heating system malfunction, restoring proper operation and heat output to the residence.
Kevin P.
Kevin P. Checked in
Responded to no heat call on residential HVAC system less than 10 years old. Upon arrival, performed diagnostic testing using digital multimeter which revealed supply voltage reading of 240V and temperature measurement of 55.4°F at the equipment. Identified and resolved heating system malfunction, restoring proper operation and heat output to the residence.
Caledonia, WI 53108
Completed comprehensive HVAC tune-up service including inspection of electrical components, wiring connections, and capacitor within the system's control panel. All wire bundles were examined for proper routing and secure connections, and the evaporator coil was inspected for cleanliness and proper operation. System tested successfully with all components functioning within normal parameters.
Completed comprehensive HVAC tune-up service including inspection of electrical components, wiring connections, and capacitor within the system's control panel. All wire bundles were examined for proper routing and secure connections, and the evaporator coil was inspected for cleanliness and proper operation. System tested successfully with all components functioning within normal parameters.
Makinze C.
Makinze C. Checked in
Completed comprehensive HVAC tune-up service including inspection of electrical components, wiring connections, and capacitor within the system's control panel. All wire bundles were examined for proper routing and secure connections, and the evaporator coil was inspected for cleanliness and proper operation. System tested successfully with all components functioning within normal parameters.
Caledonia, WI 53108

 

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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.