AC Repair & HVAC Replacement in Oak Creek, WI Since 1929

Thielmann - Shorewood - House 1

At The Thielmann Group, our team has been offering reliable heating, air conditioning, and HVAC repair services in Oak Creek, Wisconsin and other areas for over 90 years. Our comprehensive residential and commercial HVAC service ensures that your Oak Creek property is always at the ideal temperature.

Our NATE-certified technicians have the skills and experience to handle any heating or cooling issue and provide service for all brands of equipment, and with our 24/7 emergency services, we are here for you when you need us most.

For superior HVAC service in Oak Creek, trust the team at The Thielmann Group by calling (262) 299-6197 today or contact us online!

Top-Rated AC Services

Our licensed and insured technicians are proud to provide you with outstanding air conditioning (AC) services in Oak Creek, Wisconsin. With our wide range of services, we will work to ensure that you have the cooling power, including:

Ductless Mini-Splits

In addition to forced air, our team provides service for ductless mini-splits. With these unique systems, you’ll get great benefits, including increased energy efficiency, decreased noise, and easy maintenance, all without relying on ductwork in your home.

Heat Pumps

To streamline your HVAC, consider a heat pump. These systems work to both heat and cool your home and can provide exceptional performance with maximum energy efficiency.

Reliable Heating Services

Our comprehensive HVAC and heating services include installation, replacement, repair, and maintenance of a wide variety of popular heating systems, including:

  • Gas and oil furnaces: Furnaces are always a popular choice for heating and offer great energy efficiency.
  • Boilers: Boilers require less fuel for heating and are cost-efficient while providing quiet and consistent heat.
  • Heat pumps: A heat pump does double duty to heat and cool your home and is a highly energy-efficient option.

When you need unmatched heating service, trust the team at The Thielmann Group. Call us today at (262) 299-6197 to schedule services!

Ductwork Services in Oak Creek

Your ducts are responsible for moving heated and cool air throughout your home and are critical to your home’s comfort system.

We offer a variety of duct services to ensure that your home is at the perfect temperature, including:

Schedule your ductwork service today by calling (262) 299-6197 or contacting us online!

Air Conditioning and HVAC Repair Services in Oak Creek, WI

Indoor Air Quality Services

At The Thielmann Group, we understand the importance of high-quality indoor air. With our indoor air quality services, we’ll help ensure that the air you and your family breathe daily is clean and safe.

We offer a variety of systems, including:

  • Air purifiers: These systems clean your air using a high-efficiency filter on the air your HVAC system is pushing into your ducts.
  • Whole-house humidifiers & dehumidifiers: Moisture balance is critical for fresh air in your home, and with a whole-home humidifier or dehumidifier, you can prevent issues like mold, mildew, dry skin, and snoring.

Don’t delay! Get clean air today by calling (262) 299-6197 or contacting us online today!

Packaged Units Services

Packaged units are all-in-one systems that provide heating and cooling from a single unit. With these systems, you’ll get maximum efficiency with a simple installation and quiet performance. These units are often an ideal choice for smaller homes.

Our services include:

  • Packaged unit installation & replacement
  • Packaged unit repairs
  • Packaged unit maintenance

Interested in a packaged system? Call our team at (262) 299-6197 or contact us online to see if this option is right for you!

Air Conditioning and HVAC Repair Services in Oak Creek, WI

Reliable Plumbing Services in Oak Creek, WI

If left unattended, a plumbing problem can quickly go from a minor inconvenience to a major repair. When this happens to you, call Thielmann Heating, Cooling, and Plumbing! Our team of plumbers in Oak Creek have the training, experience, and tools needed to locate and repair any problem with your plumbing system. 

We fix everyday problems like dripping faucets, slow drains, and leaking pipes. We also handle larger projects, including full pipe replacements, water heater upgrades, and sump pump installation. Our goal is simple; keep your plumbing system reliable and your home safe from water damage.

The Oak Creek plumbers from Thielmann offer:

  • Leak detection and pipe repairs to stop hidden issues before they spread.
  • Drain cleaning to clear blockages and keep water flowing fast.
  • Garbage disposal repairs or installations to make kitchen cleanup simple.
  • Water heater service, repair, or replacement to keep your hot water consistent.
  • Fixture installation and repair for toilets, sinks, and faucets that need attention.
  • Water filtration and softening solutions for cleaner, better-tasting water.
  • Sump pump repairs and maintenance to protect your basement from flooding.

We believe every repair should last. Our licensed plumbers find the root cause, fix it correctly, and make sure you understand the work before we leave. We also perform routine plumbing checks to catch small problems before they become major repairs. For clear pricing, honest recommendations, and lasting results, call Thielmann Heating, Cooling, and Plumbing today at (262) 299-6197 to schedule your Oak Creek plumbing service.

Choose The Thielmann Group in Oak Creek

For unmatched customer service, trust the team at The Thielmann Group. We’re proud to offer residents of Oak Creek superior service from our background-checked, licensed, and insured technicians, and with our upfront pricing, you’ll never get a surprise when it’s time for the bill.

We offer free estimates on replacements and service all brands, and with our available financing options, you can trust that you’re in excellent hands with The Thielmann Group.

Schedule your HVAC service with one of our experts today by calling (262) 299-6197 or contacting us online today!

Read Reviews by Our Customers

Recent Jobs and Reviews in Oak Creek, WI

Job Locations and Reviews

Inspected industrial HVAC unit (labeled "M5") in warehouse environment. Examined motor assembly and belt drive system components for proper operation. Noted dust accumulation on equipment and verified integrity of electrical connections to the blower motor and drive mechanism.
Inspected industrial HVAC unit (labeled "M5") in warehouse environment. Examined motor assembly and belt drive system components for proper operation. Noted dust accumulation on equipment and verified integrity of electrical connections to the blower motor and drive mechanism.
Kevin P.
Kevin P. Checked in
Inspected industrial HVAC unit (labeled "M5") in warehouse environment. Examined motor assembly and belt drive system components for proper operation. Noted dust accumulation on equipment and verified integrity of electrical connections to the blower motor and drive mechanism.
Oak Creek, WI 53154
Performed comprehensive tune-up on commercial HVAC system, including inspection of electrical components and control board connections. Conducted amperage and voltage measurements with digital multimeter, confirming proper electrical values within manufacturer specifications. Tightened loose wiring connections at control panel to prevent potential system failure and ensure continued reliable operation.
Performed comprehensive tune-up on commercial HVAC system, including inspection of electrical components and control board connections. Conducted amperage and voltage measurements with digital multimeter, confirming proper electrical values within manufacturer specifications. Tightened loose wiring connections at control panel to prevent potential system failure and ensure continued reliable operation.
Carlos R
Carlos R Checked in
Performed comprehensive tune-up on commercial HVAC system, including inspection of electrical components and control board connections. Conducted amperage and voltage measurements with digital multimeter, confirming proper electrical values within manufacturer specifications. Tightened loose wiring connections at control panel to prevent potential system failure and ensure continued reliable operation.
OAK CREEK, WI 53154
Performed routine maintenance tune-up on Carrier furnace system with attached ROTH air handler. Inspected control panel functionality, verified proper operation of electronic components, and ensured all connections were secure. System is operating within normal parameters with no issues detected.
Performed routine maintenance tune-up on Carrier furnace system with attached ROTH air handler. Inspected control panel functionality, verified proper operation of electronic components, and ensured all connections were secure. System is operating within normal parameters with no issues detected.
Josh V.
Josh V. Checked in
Performed routine maintenance tune-up on Carrier furnace system with attached ROTH air handler. Inspected control panel functionality, verified proper operation of electronic components, and ensured all connections were secure. System is operating within normal parameters with no issues detected.
Oak Creek, WI 53154
Successfully installed a complete Lennox heating system in client's basement utility room, including furnace unit with PVC ventilation pipes and comprehensive rectangular ductwork. System was properly connected to existing infrastructure with all manufacturer labels applied and safety protocols followed, providing an efficient, code-compliant HVAC solution.
Successfully installed a complete Lennox heating system in client's basement utility room, including furnace unit with PVC ventilation pipes and comprehensive rectangular ductwork. System was properly connected to existing infrastructure with all manufacturer labels applied and safety protocols followed, providing an efficient, code-compliant HVAC solution.
CJ K.
CJ K. Checked in
Successfully installed a complete Lennox heating system in client's basement utility room, including furnace unit with PVC ventilation pipes and comprehensive rectangular ductwork. System was properly connected to existing infrastructure with all manufacturer labels applied and safety protocols followed, providing an efficient, code-compliant HVAC solution.
OAK CREEK, WI 53154
Completed replacement of defective control board on Reznor HVAC unit. Diagnosed electrical issues, installed new circuit board, and reconnected all wiring harnesses (green, yellow, red, white, black, and purple). System tested after installation with all functions operating normally.
Completed replacement of defective control board on Reznor HVAC unit. Diagnosed electrical issues, installed new circuit board, and reconnected all wiring harnesses (green, yellow, red, white, black, and purple). System tested after installation with all functions operating normally.
Kevin P.
Kevin P. Checked in
Completed replacement of defective control board on Reznor HVAC unit. Diagnosed electrical issues, installed new circuit board, and reconnected all wiring harnesses (green, yellow, red, white, black, and purple). System tested after installation with all functions operating normally.
Oak Creek, WI 53154
Oak Creek, WI - Responded to no-heat call at commercial warehouse facility. Diagnosed issues with overhead suspended unit heater, performed necessary maintenance and repairs to restore heating functionality. System is now operating within normal parameters.
Kevin P.
Kevin P. Checked in
Responded to no-heat call at commercial warehouse facility. Diagnosed issues with overhead suspended unit heater, performed necessary maintenance and repairs to restore heating functionality. System is now operating within normal parameters.
Oak Creek, WI 53154
Performed diagnostic inspection on customer's furnace system, revealing significant rust and corrosion on internal metal components. Identified and replaced faulty blower motor and associated wiring harnesses that were showing signs of deterioration. Cleaned corroded connections on circuit board and verified proper system operation after repair.
Performed diagnostic inspection on customer's furnace system, revealing significant rust and corrosion on internal metal components. Identified and replaced faulty blower motor and associated wiring harnesses that were showing signs of deterioration. Cleaned corroded connections on circuit board and verified proper system operation after repair.
Adriel H.
Adriel H. Checked in
Performed diagnostic inspection on customer's furnace system, revealing significant rust and corrosion on internal metal components. Identified and replaced faulty blower motor and associated wiring harnesses that were showing signs of deterioration. Cleaned corroded connections on circuit board and verified proper system operation after repair.
Oak Creek, WI 53154
Installed new waterfall-style matte black bathroom faucet, replacing existing three-piece fixture. Connected supply lines and verified proper water flow and drainage functionality with no leaks present.
Installed new waterfall-style matte black bathroom faucet, replacing existing three-piece fixture. Connected supply lines and verified proper water flow and drainage functionality with no leaks present.
Andy S.
Andy S. Checked in
Installed new waterfall-style matte black bathroom faucet, replacing existing three-piece fixture. Connected supply lines and verified proper water flow and drainage functionality with no leaks present.
Oak Creek, WI 53154
Performed diagnostic inspection on boiler system, checking pressure gauge readings and verifying proper operation. Examined control panel components including Honeywell controller and electrical connections. All systems operating within normal parameters with pressure readings in acceptable range.
Performed diagnostic inspection on boiler system, checking pressure gauge readings and verifying proper operation. Examined control panel components including Honeywell controller and electrical connections. All systems operating within normal parameters with pressure readings in acceptable range.
Kevin P.
Kevin P. Checked in
Performed diagnostic inspection on boiler system, checking pressure gauge readings and verifying proper operation. Examined control panel components including Honeywell controller and electrical connections. All systems operating within normal parameters with pressure readings in acceptable range.
Oak Creek, WI 53154
Successfully installed new furnace unit in basement area, including proper setup of condensate pump assembly with PVC drainage and connection of all electrical components. Verified system functionality with the newly installed Honeywell Home digital thermostat, confirming proper temperature display and operational controls.
Successfully installed new furnace unit in basement area, including proper setup of condensate pump assembly with PVC drainage and connection of all electrical components. Verified system functionality with the newly installed Honeywell Home digital thermostat, confirming proper temperature display and operational controls.
Nate G.
Nate G. Checked in
Successfully installed new furnace unit in basement area, including proper setup of condensate pump assembly with PVC drainage and connection of all electrical components. Verified system functionality with the newly installed Honeywell Home digital thermostat, confirming proper temperature display and operational controls.
OAK CREEK, WI 53154
Responded to no-heat complaint on aging furnace. Performed diagnostic testing with multimeter, measuring 0.22 amps on the inducer motor. Verified gas valve operation and inspected flame pattern, which showed proper blue flames across all four burners. System is now operating correctly with restored heat output.
Responded to no-heat complaint on aging furnace. Performed diagnostic testing with multimeter, measuring 0.22 amps on the inducer motor. Verified gas valve operation and inspected flame pattern, which showed proper blue flames across all four burners. System is now operating correctly with restored heat output.
Kevin C.
Kevin C. Checked in
Responded to no-heat complaint on aging furnace. Performed diagnostic testing with multimeter, measuring 0.22 amps on the inducer motor. Verified gas valve operation and inspected flame pattern, which showed proper blue flames across all four burners. System is now operating correctly with restored heat output.
Oak Creek, WI 53154
Conducted inspection of existing HVAC system in basement area. Assessed condition of current furnace/air handler unit with connected galvanized ductwork. Evaluated existing PVC venting system running through floor joists and Space-Gard air cleaner. Provided estimate for complete system replacement based on observed installation requirements and spatial constraints.
Conducted inspection of existing HVAC system in basement area. Assessed condition of current furnace/air handler unit with connected galvanized ductwork. Evaluated existing PVC venting system running through floor joists and Space-Gard air cleaner. Provided estimate for complete system replacement based on observed installation requirements and spatial constraints.
Josh V.
Josh V. Checked in
Conducted inspection of existing HVAC system in basement area. Assessed condition of current furnace/air handler unit with connected galvanized ductwork. Evaluated existing PVC venting system running through floor joists and Space-Gard air cleaner. Provided estimate for complete system replacement based on observed installation requirements and spatial constraints.
OAK CREEK, WI 53154
Oak Creek, WI - Responded to a service call for a non-functioning furnace. Upon inspection, removed front panel to access internal components and diagnosed ignition system issue. Successfully repaired the unit by cleaning flame sensor and testing ignition sequence, confirming proper operation with stable blue flames observed in heating element area. System now functioning correctly with all safety parameters verified.
Adriel H.
Adriel H. Checked in
Responded to a service call for a non-functioning furnace. Upon inspection, removed front panel to access internal components and diagnosed ignition system issue. Successfully repaired the unit by cleaning flame sensor and testing ignition sequence, confirming proper operation with stable blue flames observed in heating element area. System now functioning correctly with all safety parameters verified.
Oak Creek, WI 53154
Responded to no heat complaint. Upon inspection, found thermostat displaying 55°F indoor temperature with 70°F set point. Confirmed heat call was active with "Heat On" indicator illuminated. Verified proper system operation as temperature was rising toward setpoint. No issues found with Honeywell ProSeries thermostat or heating system.
Responded to no heat complaint. Upon inspection, found thermostat displaying 55°F indoor temperature with 70°F set point. Confirmed heat call was active with "Heat On" indicator illuminated. Verified proper system operation as temperature was rising toward setpoint. No issues found with Honeywell ProSeries thermostat or heating system.
Carlos R
Carlos R Checked in
Responded to no heat complaint. Upon inspection, found thermostat displaying 55°F indoor temperature with 70°F set point. Confirmed heat call was active with "Heat On" indicator illuminated. Verified proper system operation as temperature was rising toward setpoint. No issues found with Honeywell ProSeries thermostat or heating system.
Oak Creek, WI 53154
Performed airflow verification testing on Carrier HVAC system that was experiencing heating issues. Initial test readings showed full system CFM at 1060 with static pressure of 0.53 and blower RPM at 953. Secondary test revealed increased static pressure (1.52) and excessive blower RPM (1310), indicating restricted airflow. Replaced clogged air filter and adjusted duct configuration to resolve the airflow restriction that was preventing proper heating operation.
Performed airflow verification testing on Carrier HVAC system that was experiencing heating issues. Initial test readings showed full system CFM at 1060 with static pressure of 0.53 and blower RPM at 953. Secondary test revealed increased static pressure (1.52) and excessive blower RPM (1310), indicating restricted airflow. Replaced clogged air filter and adjusted duct configuration to resolve the airflow restriction that was preventing proper heating operation.
Ron B.
Ron B. Checked in
Performed airflow verification testing on Carrier HVAC system that was experiencing heating issues. Initial test readings showed full system CFM at 1060 with static pressure of 0.53 and blower RPM at 953. Secondary test revealed increased static pressure (1.52) and excessive blower RPM (1310), indicating restricted airflow. Replaced clogged air filter and adjusted duct configuration to resolve the airflow restriction that was preventing proper heating operation.
Oak Creek, WI 53154
Diagnosed and repaired circuit board failure in aging furnace causing no-heat condition. Identified faulty pressure switch with significant condensation buildup on internal components. Replaced control board and pressure switch assembly, restoring proper heating operation after thorough system testing.
Diagnosed and repaired circuit board failure in aging furnace causing no-heat condition. Identified faulty pressure switch with significant condensation buildup on internal components. Replaced control board and pressure switch assembly, restoring proper heating operation after thorough system testing.
Kevin P.
Kevin P. Checked in
Diagnosed and repaired circuit board failure in aging furnace causing no-heat condition. Identified faulty pressure switch with significant condensation buildup on internal components. Replaced control board and pressure switch assembly, restoring proper heating operation after thorough system testing.
Oak Creek, WI 53154
Responded to no heat complaint on 10+ year old gas furnace. Upon inspection, found failed ignition sequence due to dirty flame sensor. Cleaned flame sensor, inspected burners and venting system, and performed system test. Unit now operating normally with proper flame recognition and consistent heat output.
Responded to no heat complaint on 10+ year old gas furnace. Upon inspection, found failed ignition sequence due to dirty flame sensor. Cleaned flame sensor, inspected burners and venting system, and performed system test. Unit now operating normally with proper flame recognition and consistent heat output.
Makinze C
Makinze C Checked in
Responded to no heat complaint on 10+ year old gas furnace. Upon inspection, found failed ignition sequence due to dirty flame sensor. Cleaned flame sensor, inspected burners and venting system, and performed system test. Unit now operating normally with proper flame recognition and consistent heat output.
Oak Creek, WI 53154
Responded to no heat call for a Goodman furnace less than 10 years old. Upon inspection, discovered significant dust accumulation on internal components and heat exchanger. Removed front panel, thoroughly cleaned dust buildup from critical components, and restored proper operation. Unit now functioning correctly with normal heat output.
Responded to no heat call for a Goodman furnace less than 10 years old. Upon inspection, discovered significant dust accumulation on internal components and heat exchanger. Removed front panel, thoroughly cleaned dust buildup from critical components, and restored proper operation. Unit now functioning correctly with normal heat output.
Adriel H.
Adriel H. Checked in
Responded to no heat call for a Goodman furnace less than 10 years old. Upon inspection, discovered significant dust accumulation on internal components and heat exchanger. Removed front panel, thoroughly cleaned dust buildup from critical components, and restored proper operation. Unit now functioning correctly with normal heat output.
Oak Creek, WI 53154
Performed routine maintenance tune-up on residential furnace system. Inspected heat exchanger and coils, noting normal copper oxidation on serpentine coils within acceptable parameters. Examined ductwork connections and verified proper insulation around unit; all components functioning correctly with no immediate service concerns identified.
Performed routine maintenance tune-up on residential furnace system. Inspected heat exchanger and coils, noting normal copper oxidation on serpentine coils within acceptable parameters. Examined ductwork connections and verified proper insulation around unit; all components functioning correctly with no immediate service concerns identified.
Josh V.
Josh V. Checked in
Performed routine maintenance tune-up on residential furnace system. Inspected heat exchanger and coils, noting normal copper oxidation on serpentine coils within acceptable parameters. Examined ductwork connections and verified proper insulation around unit; all components functioning correctly with no immediate service concerns identified.
Oak Creek, WI 53154
Performed routine tune-up on residential HVAC system located in basement utility area. Inspected furnace unit with front panel removed to examine internal components including wiring, motors, and control boards; all systems functioning properly. Verified proper operation of condensate drainage system and confirmed no leaks or damage to connected ductwork and piping.
Performed routine tune-up on residential HVAC system located in basement utility area. Inspected furnace unit with front panel removed to examine internal components including wiring, motors, and control boards; all systems functioning properly. Verified proper operation of condensate drainage system and confirmed no leaks or damage to connected ductwork and piping.
CJ K.
CJ K. Checked in
Performed routine tune-up on residential HVAC system located in basement utility area. Inspected furnace unit with front panel removed to examine internal components including wiring, motors, and control boards; all systems functioning properly. Verified proper operation of condensate drainage system and confirmed no leaks or damage to connected ductwork and piping.
Oak Creek, WI 53154
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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.