Comprehensive Home Services In Lake Geneva | Thielmann Heating And Cooling

Comprehensive Home Services in Lake Geneva

When it comes to maintaining a comfortable and functional home in Southeastern Wisconsin, Thielmann Heating, Cooling, and Plumbing has been the trusted name since 1929. With decades of experience serving our customers, we’re dedicated to providing top-notch services tailored to the unique needs of Lake Geneva residents. Whether you’re facing a leaky faucet, need a new furnace, or require a complete air conditioning overhaul, we’re here to help. Experience why so many have trusted us by calling (262) 299-6197 or contact us online now to get started.

Expert Lake Geneva Plumbing Services

Leaky sink

From minor leaks to major installations, our skilled, local plumbers are ready to tackle any challenge your home throws your way. Here’s what we offer in our Lake Geneva plumbing services:

Reliable Air Conditioning Services in Lake Geneva

When the summer heat strikes, a reliable air conditioning system is a must. Thielmann Heating, Cooling, and Plumbing offers a full range of cooling services in Lake Geneva to keep your home comfortable:

  1. AC Installation and Replacement: We’ll help you choose the right air conditioning system for your home, ensuring it is energy-efficient and tailored to your home’s cooling needs.
  2. Air Conditioning Repairs: Our Lake Geneva HVAC technicians are trained to handle all kinds of AC issues, from refrigerant leaks to malfunctioning compressors.
  3. Ductless Mini-Split Systems: Ideal for homes without ductwork, these systems provide efficient cooling with minimal disruption.
  4. Indoor Air Quality Solutions: Enhance your home’s air quality with services like air duct cleaning, dehumidifiers, and advanced filtration systems.
  5. Routine Maintenance: Regular tune-ups keep your AC system running efficiently and help prevent costly breakdowns.

Heating Services for Lake Geneva Homes

Keeping your home warm during Wisconsin’s chilly winters is crucial. Our comprehensive Lake Geneva heating services ensure that your home stays comfortable and functional no matter how low the temperature drops. Here’s how we can help:

Commercial Services for Businesses in Lake Geneva

Commercial HVAC

In addition to serving homeowners, Thielmann Heating, Cooling, and Plumbing proudly provides expert comfort solutions for businesses in the Lake Geneva area. We understand the unique needs of commercial properties and are committed to helping you maintain a safe, comfortable, and efficient environment for your employees and customers. Our commercial services include:

  • Commercial HVAC Installation and Repair: From small offices to large commercial buildings, we design and service HVAC systems to ensure optimal performance and energy efficiency.
  • Plumbing Solutions for Businesses: Whether you need new installations, repairs, or routine maintenance, our team can handle everything from commercial-grade water heaters to restroom fixtures.
  • Preventative Maintenance Plans: Regular maintenance is essential for commercial systems to minimize downtime and avoid costly repairs. We tailor maintenance plans to suit your business needs.

Why Choose Thielmann Heating, Cooling, and Plumbing?

We understand that your home is your sanctuary, and you deserve services you can trust to give you the peace of mind you deserve. Here’s why Lake Geneva residents can rely on Thielmann Heating, Cooling, and Plumbing:

Contact Us Today

Ready to experience the Thielmann Heating, Cooling, and Plumbing difference? Whether you’re planning a new installation, need a repair, or just want to learn more about our services, we’re here to help. Contact us today to schedule an appointment or request a free estimate by calling (262) 299-6197.

Let Thielmann Heating, Cooling, and Plumbing be your partner in keeping your Lake Geneva home or business safe, comfortable, and efficient year-round.

Recent Jobs and Reviews in Lake Geneva, WI

Job Locations and Reviews

Completed routine membership cooling system maintenance visit. Performed comprehensive inspection of outdoor condensing unit including electrical disconnect, refrigerant line insulation, and associated conduit work. Inspected indoor air handler components and return air grille, noting dust accumulation on filter mesh requiring attention during preventative maintenance protocol.
Completed routine membership cooling system maintenance visit. Performed comprehensive inspection of outdoor condensing unit including electrical disconnect, refrigerant line insulation, and associated conduit work. Inspected indoor air handler components and return air grille, noting dust accumulation on filter mesh requiring attention during preventative maintenance protocol.
Kevin P.
Kevin P. Checked in
Completed routine membership cooling system maintenance visit. Performed comprehensive inspection of outdoor condensing unit including electrical disconnect, refrigerant line insulation, and associated conduit work. Inspected indoor air handler components and return air grille, noting dust accumulation on filter mesh requiring attention during preventative maintenance protocol.
Lake Geneva, WI 53147
Responded to gas company-marked leak on valve in basement plumbing system. Upon inspection, identified small gas leak at valve connection point on aging copper gas line with visible corrosion. Repaired leak at valve assembly, performed pressure test to verify system integrity, and confirmed no additional leaks present in accessible piping.
Responded to gas company-marked leak on valve in basement plumbing system. Upon inspection, identified small gas leak at valve connection point on aging copper gas line with visible corrosion. Repaired leak at valve assembly, performed pressure test to verify system integrity, and confirmed no additional leaks present in accessible piping.
Gabriel S.
Gabriel S. Checked in
Responded to gas company-marked leak on valve in basement plumbing system. Upon inspection, identified small gas leak at valve connection point on aging copper gas line with visible corrosion. Repaired leak at valve assembly, performed pressure test to verify system integrity, and confirmed no additional leaks present in accessible piping.
Lake Geneva, WI 53147
Performed standard air conditioning tune-up and system evaluation. Connected manifold gauge set to measure refrigerant pressures and verify proper system operation. All components inspected and system found to be operating within normal parameters.
Performed standard air conditioning tune-up and system evaluation. Connected manifold gauge set to measure refrigerant pressures and verify proper system operation. All components inspected and system found to be operating within normal parameters.
Rich L.
Rich L. Checked in
Performed standard air conditioning tune-up and system evaluation. Connected manifold gauge set to measure refrigerant pressures and verify proper system operation. All components inspected and system found to be operating within normal parameters.
Lake Geneva, WI 53147
Lake Geneva, WI - Replaced two corroded outdoor spigot shut-off valves with new ball valves to restore proper water control and prevent leaks. Updated plumbing connections within wall-mounted access panel, ensuring all supply lines and fittings were properly secured and operational.
Gabriel S.
Gabriel S. Checked in
Replaced two corroded outdoor spigot shut-off valves with new ball valves to restore proper water control and prevent leaks. Updated plumbing connections within wall-mounted access panel, ensuring all supply lines and fittings were properly secured and operational.
Lake Geneva, WI 53147
Diagnosed non-functional outdoor hose bib and associated shut-off valve. Inspection revealed failed interior shut-off valve with corroded copper piping connections within cabinet enclosure. Replaced defective shut-off valve assembly and repaired exterior hose bib mounting at foundation level, addressing water staining on siding caused by previous fixture failure. Tested system for proper operation and verified leak-free connections at all points.
Diagnosed non-functional outdoor hose bib and associated shut-off valve. Inspection revealed failed interior shut-off valve with corroded copper piping connections within cabinet enclosure. Replaced defective shut-off valve assembly and repaired exterior hose bib mounting at foundation level, addressing water staining on siding caused by previous fixture failure. Tested system for proper operation and verified leak-free connections at all points.
Gabriel S.
Gabriel S. Checked in
Diagnosed non-functional outdoor hose bib and associated shut-off valve. Inspection revealed failed interior shut-off valve with corroded copper piping connections within cabinet enclosure. Replaced defective shut-off valve assembly and repaired exterior hose bib mounting at foundation level, addressing water staining on siding caused by previous fixture failure. Tested system for proper operation and verified leak-free connections at all points.
Lake Geneva, WI 53147
Conducted comprehensive on-site evaluation for complete HVAC system and water heater replacement. Assessed existing electrical panel capacity and circuit breaker configuration to ensure adequate power supply for new equipment installation. Inspected aging gas piping infrastructure showing significant corrosion and oxidation, documented current system conditions, and provided detailed replacement recommendations for furnace, air conditioning unit, and water heater within the requested arrival window.
Conducted comprehensive on-site evaluation for complete HVAC system and water heater replacement. Assessed existing electrical panel capacity and circuit breaker configuration to ensure adequate power supply for new equipment installation. Inspected aging gas piping infrastructure showing significant corrosion and oxidation, documented current system conditions, and provided detailed replacement recommendations for furnace, air conditioning unit, and water heater within the requested arrival window.
Michael Y.
Michael Y. Checked in
Conducted comprehensive on-site evaluation for complete HVAC system and water heater replacement. Assessed existing electrical panel capacity and circuit breaker configuration to ensure adequate power supply for new equipment installation. Inspected aging gas piping infrastructure showing significant corrosion and oxidation, documented current system conditions, and provided detailed replacement recommendations for furnace, air conditioning unit, and water heater within the requested arrival window.
Lake Geneva, WI 53147
Completed scheduled cooling system maintenance visit per membership agreement. Performed comprehensive tune-up on Lennox HVAC system, including inspection of furnace unit, air handler, and associated refrigerant lines. Verified proper operation of all mechanical components, checked electrical connections, and documented equipment condition with photographic records showing system installation and plumbing connections in good working order.
Completed scheduled cooling system maintenance visit per membership agreement. Performed comprehensive tune-up on Lennox HVAC system, including inspection of furnace unit, air handler, and associated refrigerant lines. Verified proper operation of all mechanical components, checked electrical connections, and documented equipment condition with photographic records showing system installation and plumbing connections in good working order.
Rich L.
Rich L. Checked in
Completed scheduled cooling system maintenance visit per membership agreement. Performed comprehensive tune-up on Lennox HVAC system, including inspection of furnace unit, air handler, and associated refrigerant lines. Verified proper operation of all mechanical components, checked electrical connections, and documented equipment condition with photographic records showing system installation and plumbing connections in good working order.
Lake Geneva, WI 53147
Responded to no cooling call at residential property. Upon inspection, found outdoor condenser unit with severely clogged and dirty air filter restricting airflow to the system. Filter exhibited heavy accumulation of dirt, dust, and debris with visible streaking patterns indicating extended period without maintenance. Cleaned filter and surrounding coil area, restoring proper airflow to unit. System tested and confirmed cooling operation restored to normal parameters.
Responded to no cooling call at residential property. Upon inspection, found outdoor condenser unit with severely clogged and dirty air filter restricting airflow to the system. Filter exhibited heavy accumulation of dirt, dust, and debris with visible streaking patterns indicating extended period without maintenance. Cleaned filter and surrounding coil area, restoring proper airflow to unit. System tested and confirmed cooling operation restored to normal parameters.
Rich L.
Rich L. Checked in
Responded to no cooling call at residential property. Upon inspection, found outdoor condenser unit with severely clogged and dirty air filter restricting airflow to the system. Filter exhibited heavy accumulation of dirt, dust, and debris with visible streaking patterns indicating extended period without maintenance. Cleaned filter and surrounding coil area, restoring proper airflow to unit. System tested and confirmed cooling operation restored to normal parameters.
Lake Geneva, WI 53147
Completed installation of six new toilets throughout the property, replacing existing fixtures with updated units. Installed new faucet cartridge assembly and replaced outdoor hose bib with brass valve mechanism, ensuring proper water flow and shutoff functionality. All fixtures were tested for leaks, proper operation, and code compliance upon completion.
Completed installation of six new toilets throughout the property, replacing existing fixtures with updated units. Installed new faucet cartridge assembly and replaced outdoor hose bib with brass valve mechanism, ensuring proper water flow and shutoff functionality. All fixtures were tested for leaks, proper operation, and code compliance upon completion.
Gabriel S.
Gabriel S. Checked in
Completed installation of six new toilets throughout the property, replacing existing fixtures with updated units. Installed new faucet cartridge assembly and replaced outdoor hose bib with brass valve mechanism, ensuring proper water flow and shutoff functionality. All fixtures were tested for leaks, proper operation, and code compliance upon completion.
Lake Geneva, WI 53147
Responded to no cooling complaint on 10+ year old system for second opinion evaluation. Upon arrival, performed complete system diagnostics including refrigerant pressure testing with manifold gauge set at outdoor condensing unit. Inspected indoor air handler unit in attic space and evaluated overall system operation. System assessment completed to provide customer with accurate diagnosis and repair recommendations following previous service company's evaluation.
Responded to no cooling complaint on 10+ year old system for second opinion evaluation. Upon arrival, performed complete system diagnostics including refrigerant pressure testing with manifold gauge set at outdoor condensing unit. Inspected indoor air handler unit in attic space and evaluated overall system operation. System assessment completed to provide customer with accurate diagnosis and repair recommendations following previous service company's evaluation.
Rich L.
Rich L. Checked in
Responded to no cooling complaint on 10+ year old system for second opinion evaluation. Upon arrival, performed complete system diagnostics including refrigerant pressure testing with manifold gauge set at outdoor condensing unit. Inspected indoor air handler unit in attic space and evaluated overall system operation. System assessment completed to provide customer with accurate diagnosis and repair recommendations following previous service company's evaluation.
Lake Geneva, WI 53147
Completed warranty inspection of evaporator coil on residential HVAC system. Inspected ductwork connections, humidifier integration, and overall installation quality. All components verified to be properly installed with secure connections and appropriate sealing. System operating within normal parameters with no deficiencies noted.
Completed warranty inspection of evaporator coil on residential HVAC system. Inspected ductwork connections, humidifier integration, and overall installation quality. All components verified to be properly installed with secure connections and appropriate sealing. System operating within normal parameters with no deficiencies noted.
James P.
James P. Checked in
Completed warranty inspection of evaporator coil on residential HVAC system. Inspected ductwork connections, humidifier integration, and overall installation quality. All components verified to be properly installed with secure connections and appropriate sealing. System operating within normal parameters with no deficiencies noted.
Lake Geneva, WI 53147
Installed 75-gallon residential water heater with complete copper piping connections, integrated circulation pump, and expansion tank. Customer declined permit acquisition for this installation, and no licensed electrician was utilized for electrical connections.
Installed 75-gallon residential water heater with complete copper piping connections, integrated circulation pump, and expansion tank. Customer declined permit acquisition for this installation, and no licensed electrician was utilized for electrical connections.
Gabriel S.
Gabriel S. Checked in
Installed 75-gallon residential water heater with complete copper piping connections, integrated circulation pump, and expansion tank. Customer declined permit acquisition for this installation, and no licensed electrician was utilized for electrical connections.
Lake Geneva, WI 53147
Replaced defective evaporator coil assembly on residential HVAC unit under manufacturer warranty coverage. Removed old corroded coil showing significant oxidation on copper tubing and connections. Installed new evaporator coil with heat exchanger fins and refrigerant distribution manifold. Recharged system with R410A refrigerant to manufacturer specifications. Verified proper drainage assembly function and secured all electrical connections. Tested system operation and confirmed adequate cooling performance upon completion.
Replaced defective evaporator coil assembly on residential HVAC unit under manufacturer warranty coverage. Removed old corroded coil showing significant oxidation on copper tubing and connections. Installed new evaporator coil with heat exchanger fins and refrigerant distribution manifold. Recharged system with R410A refrigerant to manufacturer specifications. Verified proper drainage assembly function and secured all electrical connections. Tested system operation and confirmed adequate cooling performance upon completion.
Rich L.
Rich L. Checked in
Replaced defective evaporator coil assembly on residential HVAC unit under manufacturer warranty coverage. Removed old corroded coil showing significant oxidation on copper tubing and connections. Installed new evaporator coil with heat exchanger fins and refrigerant distribution manifold. Recharged system with R410A refrigerant to manufacturer specifications. Verified proper drainage assembly function and secured all electrical connections. Tested system operation and confirmed adequate cooling performance upon completion.
Lake Geneva, WI 53147
Responded to service call regarding malfunctioning outdoor hose bib with suspected pipe damage. Upon investigation, accessed interior wall cavity to expose supply line running to exterior spigot. Identified failed or damaged piping requiring replacement. Created access opening through interior wall to reach affected plumbing section. Observed existing white PVC supply line with brass fittings and blue water line running through floor/wall cavity between framing members. Assessed condition of insulation and structural framing during repair work. Documented conditions via photographs for service records.
Responded to service call regarding malfunctioning outdoor hose bib with suspected pipe damage. Upon investigation, accessed interior wall cavity to expose supply line running to exterior spigot. Identified failed or damaged piping requiring replacement. Created access opening through interior wall to reach affected plumbing section. Observed existing white PVC supply line with brass fittings and blue water line running through floor/wall cavity between framing members. Assessed condition of insulation and structural framing during repair work. Documented conditions via photographs for service records.
Gabriel S.
Gabriel S. Checked in
Responded to service call regarding malfunctioning outdoor hose bib with suspected pipe damage. Upon investigation, accessed interior wall cavity to expose supply line running to exterior spigot. Identified failed or damaged piping requiring replacement. Created access opening through interior wall to reach affected plumbing section. Observed existing white PVC supply line with brass fittings and blue water line running through floor/wall cavity between framing members. Assessed condition of insulation and structural framing during repair work. Documented conditions via photographs for service records.
Lake Geneva, WI 53147
Completed prepaid membership cooling maintenance visit on residential Bryant HVAC system. Performed comprehensive inspection of indoor furnace unit and outdoor condensing unit, including visual assessment of all accessible components, electrical connections, refrigerant lines, and drainage systems. Connected manifold gauges to outdoor unit service ports to verify refrigerant pressures and system performance. Inspected capacitor, contactor, and wiring at outdoor unit with access panel removed. Verified proper operation of condensate drainage, PVC venting, and all mechanical components. System operating within normal parameters with no deficiencies noted.
Completed prepaid membership cooling maintenance visit on residential Bryant HVAC system. Performed comprehensive inspection of indoor furnace unit and outdoor condensing unit, including visual assessment of all accessible components, electrical connections, refrigerant lines, and drainage systems. Connected manifold gauges to outdoor unit service ports to verify refrigerant pressures and system performance. Inspected capacitor, contactor, and wiring at outdoor unit with access panel removed. Verified proper operation of condensate drainage, PVC venting, and all mechanical components. System operating within normal parameters with no deficiencies noted.
Rich L.
Rich L. Checked in
Completed prepaid membership cooling maintenance visit on residential Bryant HVAC system. Performed comprehensive inspection of indoor furnace unit and outdoor condensing unit, including visual assessment of all accessible components, electrical connections, refrigerant lines, and drainage systems. Connected manifold gauges to outdoor unit service ports to verify refrigerant pressures and system performance. Inspected capacitor, contactor, and wiring at outdoor unit with access panel removed. Verified proper operation of condensate drainage, PVC venting, and all mechanical components. System operating within normal parameters with no deficiencies noted.
Lake Geneva, WI 53147
Completed comprehensive plumbing inspection of residential property to assess multiple fixture issues. Inspected leaking faucet at pedestal sink with chrome cross-handle fixtures, evaluated broken exterior hose bib, and assessed six existing toilets for replacement with comfort-height almond-colored units. Documented current conditions of plumbing fixtures and pipe insulation in utility areas, noting valve assemblies and existing infrastructure to provide accurate replacement estimates.
Completed comprehensive plumbing inspection of residential property to assess multiple fixture issues. Inspected leaking faucet at pedestal sink with chrome cross-handle fixtures, evaluated broken exterior hose bib, and assessed six existing toilets for replacement with comfort-height almond-colored units. Documented current conditions of plumbing fixtures and pipe insulation in utility areas, noting valve assemblies and existing infrastructure to provide accurate replacement estimates.
Gabriel S.
Gabriel S. Checked in
Completed comprehensive plumbing inspection of residential property to assess multiple fixture issues. Inspected leaking faucet at pedestal sink with chrome cross-handle fixtures, evaluated broken exterior hose bib, and assessed six existing toilets for replacement with comfort-height almond-colored units. Documented current conditions of plumbing fixtures and pipe insulation in utility areas, noting valve assemblies and existing infrastructure to provide accurate replacement estimates.
Lake Geneva, WI 53147
Conducted estimate for natural gas furnace replacement in basement. Existing furnace is operational but aging, and customer prefers proactive replacement to avoid emergency situation. Documented existing HVAC system including outdoor condenser unit and electrical panel configuration for replacement planning.
Conducted estimate for natural gas furnace replacement in basement. Existing furnace is operational but aging, and customer prefers proactive replacement to avoid emergency situation. Documented existing HVAC system including outdoor condenser unit and electrical panel configuration for replacement planning.
Chris M.
Chris M. Checked in
Conducted estimate for natural gas furnace replacement in basement. Existing furnace is operational but aging, and customer prefers proactive replacement to avoid emergency situation. Documented existing HVAC system including outdoor condenser unit and electrical panel configuration for replacement planning.
Lake Geneva, WI 53147
Responded to no cool air complaint on aging Distinctions brand air conditioning system. Upon arrival, performed diagnostic evaluation of both indoor air handler and outdoor condensing unit. Inspected ductwork in mechanical room showing dust accumulation and verified airflow pathways. Examined outdoor unit positioned on concrete pad with proper clearances maintained. Assessed system components including condenser coil, electrical connections at disconnect box, and refrigerant line set. Unit restored to proper cooling operation with homeowner satisfied with results.
Responded to no cool air complaint on aging Distinctions brand air conditioning system. Upon arrival, performed diagnostic evaluation of both indoor air handler and outdoor condensing unit. Inspected ductwork in mechanical room showing dust accumulation and verified airflow pathways. Examined outdoor unit positioned on concrete pad with proper clearances maintained. Assessed system components including condenser coil, electrical connections at disconnect box, and refrigerant line set. Unit restored to proper cooling operation with homeowner satisfied with results.
Rich L.
Rich L. Checked in
Responded to no cool air complaint on aging Distinctions brand air conditioning system. Upon arrival, performed diagnostic evaluation of both indoor air handler and outdoor condensing unit. Inspected ductwork in mechanical room showing dust accumulation and verified airflow pathways. Examined outdoor unit positioned on concrete pad with proper clearances maintained. Assessed system components including condenser coil, electrical connections at disconnect box, and refrigerant line set. Unit restored to proper cooling operation with homeowner satisfied with results.
Lake Geneva, WI 53147
Responded to no cooling call on Carrier air conditioning system. Upon inspection, found system low on refrigerant due to leaking Schrader valve cores at service ports. Replaced both valve cores with new brass components and recharged system to manufacturer specifications. Applied coil cleaner to outdoor condenser unit and cleaned debris from fins to restore proper airflow and heat transfer. System tested and confirmed cooling operation restored with proper temperatures and pressures.
Responded to no cooling call on Carrier air conditioning system. Upon inspection, found system low on refrigerant due to leaking Schrader valve cores at service ports. Replaced both valve cores with new brass components and recharged system to manufacturer specifications. Applied coil cleaner to outdoor condenser unit and cleaned debris from fins to restore proper airflow and heat transfer. System tested and confirmed cooling operation restored with proper temperatures and pressures.
Rich L.
Rich L. Checked in
Responded to no cooling call on Carrier air conditioning system. Upon inspection, found system low on refrigerant due to leaking Schrader valve cores at service ports. Replaced both valve cores with new brass components and recharged system to manufacturer specifications. Applied coil cleaner to outdoor condenser unit and cleaned debris from fins to restore proper airflow and heat transfer. System tested and confirmed cooling operation restored with proper temperatures and pressures.
Lake Geneva, WI 53147
Responded to service call for leaking Aprilaire humidifier on residential HVAC system. Upon arrival, inspected furnace and humidifier assembly in basement utility area. Used manifold gauge set to verify system pressures and confirm proper refrigerant levels on associated equipment. Identified source of water leak from humidifier unit, addressed issue, and verified all connections were secure. System tested and confirmed operational with no further leaking detected at time of departure.
Responded to service call for leaking Aprilaire humidifier on residential HVAC system. Upon arrival, inspected furnace and humidifier assembly in basement utility area. Used manifold gauge set to verify system pressures and confirm proper refrigerant levels on associated equipment. Identified source of water leak from humidifier unit, addressed issue, and verified all connections were secure. System tested and confirmed operational with no further leaking detected at time of departure.
Rich L.
Rich L. Checked in
Responded to service call for leaking Aprilaire humidifier on residential HVAC system. Upon arrival, inspected furnace and humidifier assembly in basement utility area. Used manifold gauge set to verify system pressures and confirm proper refrigerant levels on associated equipment. Identified source of water leak from humidifier unit, addressed issue, and verified all connections were secure. System tested and confirmed operational with no further leaking detected at time of departure.
Lake Geneva, WI 53147

 

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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.