HVAC & Air Conditioner Repair Experts In Waterford, WI

Heating, Cooling and Plumbing Services in Waterford, Wisconsin

Your Local HVAC Company since 1929

Thielmann - New Berlin - Thielmann 10

Thielmann Heating, Cooling, & Plumbing is the trusted choice for all your heating, ventilation and air conditioning (HVAC) and plumbing needs in Waterford, Wisconsin! Our number one priority is customer satisfaction, and we go above and beyond to ensure you receive the best service possible. Give our team a call at (262) 384-6407 to receive assistance with a malfunctioning HVAC or plumbing system or if you need efficient installation or maintenance services.

Waterford Heating Company

Do you need reliable heating services in Waterford? We work hard to provide the best heating products, installation and services in Waterford, Wisconsin.

Our trained professionals are always willing to take on routine and complex projects. Rest assured, we’ve got you covered with prompt, 24/7 service to repair all makes and models. Our heating services include:

  • Heating repairs: Few things are as satisfying and convenient as turning on your heater after coming in from the cold. When your heater’s making loud noises, you notice strange odors or you’re not getting enough warm air, we can assist. We’ll drive to your property and repair the issue promptly.
  • Heating installations: Trust our HVAC technicians to provide a durable, energy-efficient installation. From boilers to gas and oil furnaces, we can install them all.
  • Heating maintenance: Be ahead of unexpected breakdowns. When you sign up for our maintenance program, you can enjoy regular heater checkups and an annual plumbing inspection.

Waterford, WI Air Conditioner and HVAC Repair Services

Reliable Cooling Services

Keep your home comfortable and beat the heat with our air conditioner services, which include:

  • AC repairs: We have the skills and knowledge to handle any air conditioner issues and will repair your cooling system with care.
  • AC installations: If it’s time for a new AC, look to us. We use advanced tools and the latest industry techniques to install your air conditioner safely and according to compliance standards.
  • AC maintenance: Annual tuneups can give you peace of mind and save you money in the long run. From clearing the drain line and pan to checking refrigerant levels, we’ll do a thorough checkup for a smooth-running unit.

We service various cooling systems, such as:

  • Air conditioners: We can work on all models of air conditioners for residential and commercial properties, including central air conditioning systems.
  • Ductless mini-splits: Request installation and maintenance services for ductless mini-split systems, perfect for homes without existing ductwork
  • Packaged units: We can handle packaged unit systems for both residential and commercial properties.
  • Heat pumps: Get repairs, installation and maintenance for energy-efficient heat pumps that deliver warm and cool air.

Indoor Air Quality Solutions

We understand the importance of clean and healthy indoor environments for homes and businesses. Our comprehensive solutions, including humidity control, air purification and duct cleaning and installation, are designed to enhance the quality of your indoor air.

Your HVAC’s ductwork is like your property’s lungs, ensuring comfort and well-being as heated or cooled air flows through the duct system. Achieve optimal indoor air quality with our comprehensive selection of air purification services in the local Waterford, Wisconsin, area:

Plumbing Services You Can Trust

Whether you’re busy with a complete property upgrade or need smaller plumbing repairs, our technicians can handle it all. No job is too big or too small for us, and we go above and beyond for every customer. If you need reliable, efficient plumbing services in and around Waterford, we’re the local choice you can rely on. Call us for the following plumbing services:

Waterford, WI Air Conditioner and HVAC Repair Services

Contact Thielmann Heating, Cooling, & Plumbing Today

Since 1929, our team has been the go-to choice for top-quality residential and commercial HVAC and plumbing services in Waterford, Wisconsin and beyond. We can service all brands, provide 24/7 emergency HVAC care and more.

We also provide expert plumbing services for homes and businesses, enabling you to enjoy a comfortable property. Rest assured, we have you covered for all your plumbing and HVAC needs! Plus, we offer upfront pricing, financing optionsspecial deals and a job well done.

Contact us online or call (262) 384-6407 today. You can also schedule the services you need.

Read Reviews by Our Customers

Recent Jobs and Reviews in Waterford, WI

Job Locations and Reviews

# Complete HVAC System Installation

Successfully completed a full residential HVAC system replacement including new furnace, air conditioning unit, water heater, and F100 filter cabinet. Removed existing equipment and installed all new components per manufacturer specifications and local building codes. Coordinated with licensed electrician to ensure proper electrical connections and power supply for all equipment.

## Equipment Installation

Installed new high-efficiency furnace in existing location with proper clearances and venting. Connected new furnace to existing ductwork system after inspection and verification of proper airflow paths. Mounted new F100 filter cabinet to provide enhanced air filtration for the complete system.

Positioned new outdoor condensing unit on level surface with appropriate clearances from building structure and landscaping. Connected refrigerant lines using copper piping with proper insulation and brass fittings. Evacuated refrigerant lines and charged
# Complete HVAC System Installation

Successfully completed a full residential HVAC system replacement including new furnace, air conditioning unit, water heater, and F100 filter cabinet. Removed existing equipment and installed all new components per manufacturer specifications and local building codes. Coordinated with licensed electrician to ensure proper electrical connections and power supply for all equipment.

## Equipment Installation

Installed new high-efficiency furnace in existing location with proper clearances and venting. Connected new furnace to existing ductwork system after inspection and verification of proper airflow paths. Mounted new F100 filter cabinet to provide enhanced air filtration for the complete system.

Positioned new outdoor condensing unit on level surface with appropriate clearances from building structure and landscaping. Connected refrigerant lines using copper piping with proper insulation and brass fittings. Evacuated refrigerant lines and charged
James P.
James P. Checked in
# Complete HVAC System Installation Successfully completed a full residential HVAC system replacement including new furnace, air conditioning unit, water heater, and F100 filter cabinet. Removed existing equipment and installed all new components per manufacturer specifications and local building codes. Coordinated with licensed electrician to ensure proper electrical connections and power supply for all equipment. ## Equipment Installation Installed new high-efficiency furnace in existing location with proper clearances and venting. Connected new furnace to existing ductwork system after inspection and verification of proper airflow paths. Mounted new F100 filter cabinet to provide enhanced air filtration for the complete system. Positioned new outdoor condensing unit on level surface with appropriate clearances from building structure and landscaping. Connected refrigerant lines using copper piping with proper insulation and brass fittings. Evacuated refrigerant lines and charged
Waterford, WI 53185
Completed installation of Infinity brand air conditioning system with matching evaporator coil in residential basement location. New AC unit and coil were properly positioned, connected to existing ductwork via galvanized metal plenum, and integrated with condensate drainage system using white PVC piping. All electrical connections, refrigerant lines, and ductwork transitions were secured and tested to ensure proper system operation and compliance with manufacturer specifications.
Completed installation of Infinity brand air conditioning system with matching evaporator coil in residential basement location. New AC unit and coil were properly positioned, connected to existing ductwork via galvanized metal plenum, and integrated with condensate drainage system using white PVC piping. All electrical connections, refrigerant lines, and ductwork transitions were secured and tested to ensure proper system operation and compliance with manufacturer specifications.
Jeff D.
Jeff D. Checked in
Completed installation of Infinity brand air conditioning system with matching evaporator coil in residential basement location. New AC unit and coil were properly positioned, connected to existing ductwork via galvanized metal plenum, and integrated with condensate drainage system using white PVC piping. All electrical connections, refrigerant lines, and ductwork transitions were secured and tested to ensure proper system operation and compliance with manufacturer specifications.
WATERFORD, WI 53185
Completed comprehensive tune-up on Infinity furnace system as part of recent AC installation package. Performed standard maintenance protocol including air filter replacement, system diagnostics with digital measurement tools showing operational reading of 33.3, and thorough inspection of internal components including copper refrigerant lines and electrical connections to ensure optimal performance and efficiency.
Completed comprehensive tune-up on Infinity furnace system as part of recent AC installation package. Performed standard maintenance protocol including air filter replacement, system diagnostics with digital measurement tools showing operational reading of 33.3, and thorough inspection of internal components including copper refrigerant lines and electrical connections to ensure optimal performance and efficiency.
Ron B.
Ron B. Checked in
Completed comprehensive tune-up on Infinity furnace system as part of recent AC installation package. Performed standard maintenance protocol including air filter replacement, system diagnostics with digital measurement tools showing operational reading of 33.3, and thorough inspection of internal components including copper refrigerant lines and electrical connections to ensure optimal performance and efficiency.
WATERFORD, WI 53185
Performed air conditioning system startup on new installation. Verified all condensate valves were open and operational across zones 1-4. Utilized digital thermocouple thermometer and manifold gauge set to measure system temperatures and refrigerant pressures, confirming proper charge levels and system readiness. All equipment tested and verified ready for operation.
Performed air conditioning system startup on new installation. Verified all condensate valves were open and operational across zones 1-4. Utilized digital thermocouple thermometer and manifold gauge set to measure system temperatures and refrigerant pressures, confirming proper charge levels and system readiness. All equipment tested and verified ready for operation.
Rich L.
Rich L. Checked in
Performed air conditioning system startup on new installation. Verified all condensate valves were open and operational across zones 1-4. Utilized digital thermocouple thermometer and manifold gauge set to measure system temperatures and refrigerant pressures, confirming proper charge levels and system readiness. All equipment tested and verified ready for operation.
Waterford, WI 53185
Completed prepaid maintenance visit on residential cooling system. Performed comprehensive system diagnostics using manifold gauges to verify refrigerant pressures and overall system performance. Unit operating within normal parameters with all components functioning properly at time of inspection.
Completed prepaid maintenance visit on residential cooling system. Performed comprehensive system diagnostics using manifold gauges to verify refrigerant pressures and overall system performance. Unit operating within normal parameters with all components functioning properly at time of inspection.
Rich L.
Rich L. Checked in
Completed prepaid maintenance visit on residential cooling system. Performed comprehensive system diagnostics using manifold gauges to verify refrigerant pressures and overall system performance. Unit operating within normal parameters with all components functioning properly at time of inspection.
Waterford, WI 53185
Performed comprehensive tune-up on Carrier air conditioning system. Connected manifold gauges to verify refrigerant pressures and system performance, confirmed proper operating pressures on both high and low sides. Applied coil cleaner to condenser unit and cleaned exterior fins to restore optimal heat transfer efficiency and airflow.
Performed comprehensive tune-up on Carrier air conditioning system. Connected manifold gauges to verify refrigerant pressures and system performance, confirmed proper operating pressures on both high and low sides. Applied coil cleaner to condenser unit and cleaned exterior fins to restore optimal heat transfer efficiency and airflow.
Rich L.
Rich L. Checked in
Performed comprehensive tune-up on Carrier air conditioning system. Connected manifold gauges to verify refrigerant pressures and system performance, confirmed proper operating pressures on both high and low sides. Applied coil cleaner to condenser unit and cleaned exterior fins to restore optimal heat transfer efficiency and airflow.
Waterford, WI 53185
Completed return visit to install face plate on supply plenum. Secured and mounted face plate assembly to vertical duct section in mechanical room, ensuring proper seal and professional appearance. Installation verified and system confirmed operational.
Completed return visit to install face plate on supply plenum. Secured and mounted face plate assembly to vertical duct section in mechanical room, ensuring proper seal and professional appearance. Installation verified and system confirmed operational.
Ron B.
Ron B. Checked in
Completed return visit to install face plate on supply plenum. Secured and mounted face plate assembly to vertical duct section in mechanical room, ensuring proper seal and professional appearance. Installation verified and system confirmed operational.
WATERFORD, WI 53185
Responded to call for leaking hose bib at exterior wall junction. Upon inspection, identified active leak at outdoor spigot connection causing rust staining on white wood siding. Accessed shut-off valve from interior crawl space through attic access point. Installed new gate valve with blue handle on copper supply line to provide isolation capability for future maintenance. Tested system for proper operation and verified leak resolution at exterior hose bib connection point.
Responded to call for leaking hose bib at exterior wall junction. Upon inspection, identified active leak at outdoor spigot connection causing rust staining on white wood siding. Accessed shut-off valve from interior crawl space through attic access point. Installed new gate valve with blue handle on copper supply line to provide isolation capability for future maintenance. Tested system for proper operation and verified leak resolution at exterior hose bib connection point.
Gabriel S.
Gabriel S. Checked in
Responded to call for leaking hose bib at exterior wall junction. Upon inspection, identified active leak at outdoor spigot connection causing rust staining on white wood siding. Accessed shut-off valve from interior crawl space through attic access point. Installed new gate valve with blue handle on copper supply line to provide isolation capability for future maintenance. Tested system for proper operation and verified leak resolution at exterior hose bib connection point.
Waterford, WI 53185
Responded to service call for water softener evaluation after unit displayed error message following 24-hour operation cycle. Upon inspection, identified existing water treatment system as over 20 years old with outdated control panel and digital display. Documented current installation configuration including copper supply line connections with brass compression fittings, red-handled shut-off valve, and PVC drain line. Assessed unit positioning in basement utility area near brick wall structure and concrete floor. Photographed existing equipment setup, plumbing connections, electrical supply with power cord to wall outlet, and overall system layout. Provided estimate for complete water softener replacement due to age of existing equipment and operational failure.
Responded to service call for water softener evaluation after unit displayed error message following 24-hour operation cycle. Upon inspection, identified existing water treatment system as over 20 years old with outdated control panel and digital display. Documented current installation configuration including copper supply line connections with brass compression fittings, red-handled shut-off valve, and PVC drain line. Assessed unit positioning in basement utility area near brick wall structure and concrete floor. Photographed existing equipment setup, plumbing connections, electrical supply with power cord to wall outlet, and overall system layout. Provided estimate for complete water softener replacement due to age of existing equipment and operational failure.
Gabriel S.
Gabriel S. Checked in
Responded to service call for water softener evaluation after unit displayed error message following 24-hour operation cycle. Upon inspection, identified existing water treatment system as over 20 years old with outdated control panel and digital display. Documented current installation configuration including copper supply line connections with brass compression fittings, red-handled shut-off valve, and PVC drain line. Assessed unit positioning in basement utility area near brick wall structure and concrete floor. Photographed existing equipment setup, plumbing connections, electrical supply with power cord to wall outlet, and overall system layout. Provided estimate for complete water softener replacement due to age of existing equipment and operational failure.
Waterford, WI 53185
Completed routine HVAC tune-up on system greater than 10 years old. Performed refrigerant pressure testing using manifold gauge set and verified electrical components with digital multimeter to ensure proper system operation and performance within manufacturer specifications.
Completed routine HVAC tune-up on system greater than 10 years old. Performed refrigerant pressure testing using manifold gauge set and verified electrical components with digital multimeter to ensure proper system operation and performance within manufacturer specifications.
Todd H.
Todd H. Checked in
Completed routine HVAC tune-up on system greater than 10 years old. Performed refrigerant pressure testing using manifold gauge set and verified electrical components with digital multimeter to ensure proper system operation and performance within manufacturer specifications.
Waterford, WI 53185
Provided estimate for replacement of existing Carrier Infinity air conditioning system due to leak in evaporator coil. Documented existing equipment model and serial numbers via thermostat interface and assessed current furnace and ductwork configuration in mechanical room for compatibility with new system installation.
Provided estimate for replacement of existing Carrier Infinity air conditioning system due to leak in evaporator coil. Documented existing equipment model and serial numbers via thermostat interface and assessed current furnace and ductwork configuration in mechanical room for compatibility with new system installation.
Dave V.
Dave V. Checked in
Provided estimate for replacement of existing Carrier Infinity air conditioning system due to leak in evaporator coil. Documented existing equipment model and serial numbers via thermostat interface and assessed current furnace and ductwork configuration in mechanical room for compatibility with new system installation.
WATERFORD, WI 53185
Responded to callback regarding recent installation quality concerns. Verified thermostat level alignment using torpedo level and documented exterior condensate line penetration with expanding foam sealant. Photographed both items for quality assurance review and advised customer that invoice will be mailed following this no-charge service visit.
Responded to callback regarding recent installation quality concerns. Verified thermostat level alignment using torpedo level and documented exterior condensate line penetration with expanding foam sealant. Photographed both items for quality assurance review and advised customer that invoice will be mailed following this no-charge service visit.
Ron B.
Ron B. Checked in
Responded to callback regarding recent installation quality concerns. Verified thermostat level alignment using torpedo level and documented exterior condensate line penetration with expanding foam sealant. Photographed both items for quality assurance review and advised customer that invoice will be mailed following this no-charge service visit.
WATERFORD, WI 53185
Completed furnace and air conditioning tune-up maintenance service on residential HVAC system. Performed comprehensive inspection of furnace components including blower motor assembly, gas valve operation, electrical connections, and control board functionality. All systems tested and operating within normal parameters.
Completed furnace and air conditioning tune-up maintenance service on residential HVAC system. Performed comprehensive inspection of furnace components including blower motor assembly, gas valve operation, electrical connections, and control board functionality. All systems tested and operating within normal parameters.
Rich L.
Rich L. Checked in
Completed furnace and air conditioning tune-up maintenance service on residential HVAC system. Performed comprehensive inspection of furnace components including blower motor assembly, gas valve operation, electrical connections, and control board functionality. All systems tested and operating within normal parameters.
Waterford, WI 53185
Conducted estimate for replacement of existing water heater installed in 2002. Evaluated current installation including ductwork, plumbing configuration with PEX piping, and available space in mechanical room. Discussed tankless water heater options with customer as alternative to conventional tank-style unit, reviewed installation requirements, venting considerations, and system specifications suitable for the property.
Conducted estimate for replacement of existing water heater installed in 2002. Evaluated current installation including ductwork, plumbing configuration with PEX piping, and available space in mechanical room. Discussed tankless water heater options with customer as alternative to conventional tank-style unit, reviewed installation requirements, venting considerations, and system specifications suitable for the property.
Michael Y.
Michael Y. Checked in
Conducted estimate for replacement of existing water heater installed in 2002. Evaluated current installation including ductwork, plumbing configuration with PEX piping, and available space in mechanical room. Discussed tankless water heater options with customer as alternative to conventional tank-style unit, reviewed installation requirements, venting considerations, and system specifications suitable for the property.
Waterford, WI 53185
Completed installation of new furnace and humidifier system in residential basement location. Installed gray metal vertical cabinet-style furnace unit with associated ductwork connections, routing large supply and return ducts through exposed ceiling joists. Connected humidifier equipment to system, with PVC condensate drainage piping staged for final connection. All equipment properly positioned on concrete floor, ductwork secured to ceiling structure with appropriate hangers, and system prepared for startup and commissioning.
Completed installation of new furnace and humidifier system in residential basement location. Installed gray metal vertical cabinet-style furnace unit with associated ductwork connections, routing large supply and return ducts through exposed ceiling joists. Connected humidifier equipment to system, with PVC condensate drainage piping staged for final connection. All equipment properly positioned on concrete floor, ductwork secured to ceiling structure with appropriate hangers, and system prepared for startup and commissioning.
Juan C.
Juan C. Checked in
Completed installation of new furnace and humidifier system in residential basement location. Installed gray metal vertical cabinet-style furnace unit with associated ductwork connections, routing large supply and return ducts through exposed ceiling joists. Connected humidifier equipment to system, with PVC condensate drainage piping staged for final connection. All equipment properly positioned on concrete floor, ductwork secured to ceiling structure with appropriate hangers, and system prepared for startup and commissioning.
WATERFORD, WI 53185
Completed routine cooling system maintenance visit as part of recurring membership agreement. Performed standard diagnostic checks using manifold gauge set to verify refrigerant pressures and system performance on horizontal air handler unit located in attic space. Inspected equipment operation, condensate drain lines, and ductwork connections to ensure proper system functionality.
Completed routine cooling system maintenance visit as part of recurring membership agreement. Performed standard diagnostic checks using manifold gauge set to verify refrigerant pressures and system performance on horizontal air handler unit located in attic space. Inspected equipment operation, condensate drain lines, and ductwork connections to ensure proper system functionality.
Rich L.
Rich L. Checked in
Completed routine cooling system maintenance visit as part of recurring membership agreement. Performed standard diagnostic checks using manifold gauge set to verify refrigerant pressures and system performance on horizontal air handler unit located in attic space. Inspected equipment operation, condensate drain lines, and ductwork connections to ensure proper system functionality.
Waterford, WI 53185
Conducted estimate for complete HVAC system replacement in basement installation. Existing furnace (80,000 BTU natural gas unit) is non-operational and requires replacement along with air conditioning system. Assessed current equipment configuration, measured installation area, and documented existing ductwork layout including supply and return air pathways. Provided estimate for new furnace and AC system with promotional offer including complimentary water heater replacement. Documented equipment specifications, clearance requirements, and necessary modifications for proper installation.
Conducted estimate for complete HVAC system replacement in basement installation. Existing furnace (80,000 BTU natural gas unit) is non-operational and requires replacement along with air conditioning system. Assessed current equipment configuration, measured installation area, and documented existing ductwork layout including supply and return air pathways. Provided estimate for new furnace and AC system with promotional offer including complimentary water heater replacement. Documented equipment specifications, clearance requirements, and necessary modifications for proper installation.
Michael Y.
Michael Y. Checked in
Conducted estimate for complete HVAC system replacement in basement installation. Existing furnace (80,000 BTU natural gas unit) is non-operational and requires replacement along with air conditioning system. Assessed current equipment configuration, measured installation area, and documented existing ductwork layout including supply and return air pathways. Provided estimate for new furnace and AC system with promotional offer including complimentary water heater replacement. Documented equipment specifications, clearance requirements, and necessary modifications for proper installation.
Waterford, WI 53185
Completed comprehensive AC tune-up on Carrier system, including indoor furnace and outdoor condenser unit inspection. Performed standard maintenance procedures with refrigerant pressure testing using manifold gauges, electrical component verification, and system operational checks. All equipment found operating within normal parameters with no issues identified during service visit.
Completed comprehensive AC tune-up on Carrier system, including indoor furnace and outdoor condenser unit inspection. Performed standard maintenance procedures with refrigerant pressure testing using manifold gauges, electrical component verification, and system operational checks. All equipment found operating within normal parameters with no issues identified during service visit.
Rich L.
Rich L. Checked in
Completed comprehensive AC tune-up on Carrier system, including indoor furnace and outdoor condenser unit inspection. Performed standard maintenance procedures with refrigerant pressure testing using manifold gauges, electrical component verification, and system operational checks. All equipment found operating within normal parameters with no issues identified during service visit.
WATERFORD, WI 53185
Responded to no heat call on a two-zone hydronic boiler system. Upon arrival, found the zones were not operating independently as designed. Performed diagnostic evaluation of the boiler, circulator pumps, zone valves, and associated controls. Inspected gas valve, burner assembly, and all electrical connections within the heating unit. Verified proper operation of expansion tank, air separator, and piping configuration. Tested system controls and thermostats to ensure proper zone isolation and independent operation. Restored heat to the residence and confirmed both zones were functioning correctly before departure.
Responded to no heat call on a two-zone hydronic boiler system. Upon arrival, found the zones were not operating independently as designed. Performed diagnostic evaluation of the boiler, circulator pumps, zone valves, and associated controls. Inspected gas valve, burner assembly, and all electrical connections within the heating unit. Verified proper operation of expansion tank, air separator, and piping configuration. Tested system controls and thermostats to ensure proper zone isolation and independent operation. Restored heat to the residence and confirmed both zones were functioning correctly before departure.
Rich L.
Rich L. Checked in
Responded to no heat call on a two-zone hydronic boiler system. Upon arrival, found the zones were not operating independently as designed. Performed diagnostic evaluation of the boiler, circulator pumps, zone valves, and associated controls. Inspected gas valve, burner assembly, and all electrical connections within the heating unit. Verified proper operation of expansion tank, air separator, and piping configuration. Tested system controls and thermostats to ensure proper zone isolation and independent operation. Restored heat to the residence and confirmed both zones were functioning correctly before departure.
Waterford, WI 53185
Waterford, WI - Conducted on-site assessment for sump pump and battery backup system installation in crawl space area. Evaluated existing sump pump that has been inactive for approximately two decades and documented current mechanical equipment configuration including discharge piping and electrical components for comprehensive estimate preparation.
Gabriel S.
Gabriel S. Checked in
Conducted on-site assessment for sump pump and battery backup system installation in crawl space area. Evaluated existing sump pump that has been inactive for approximately two decades and documented current mechanical equipment configuration including discharge piping and electrical components for comprehensive estimate preparation.
Waterford, WI 53185
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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.