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

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

Successfully installed a complete HVAC system featuring a Honeywell Home digital thermostat with temperature control functionality. System installation included proper mounting of equipment cabinet with secure copper line connections and appropriate fastening to ensure optimal system performance.
Successfully installed a complete HVAC system featuring a Honeywell Home digital thermostat with temperature control functionality. System installation included proper mounting of equipment cabinet with secure copper line connections and appropriate fastening to ensure optimal system performance.
James P.
James P. Checked in
Successfully installed a complete HVAC system featuring a Honeywell Home digital thermostat with temperature control functionality. System installation included proper mounting of equipment cabinet with secure copper line connections and appropriate fastening to ensure optimal system performance.
Oak Creek, WI 53154
Performed comprehensive HVAC tune-up including inspection of electrical components and ignition system. Removed and checked igniter assembly, noting normal wear. Inspected wiring connections at control board and pressure switch, ensuring proper electrical continuity throughout system. All components tested and verified operational.
Performed comprehensive HVAC tune-up including inspection of electrical components and ignition system. Removed and checked igniter assembly, noting normal wear. Inspected wiring connections at control board and pressure switch, ensuring proper electrical continuity throughout system. All components tested and verified operational.
Carlos R
Carlos R Checked in
Performed comprehensive HVAC tune-up including inspection of electrical components and ignition system. Removed and checked igniter assembly, noting normal wear. Inspected wiring connections at control board and pressure switch, ensuring proper electrical continuity throughout system. All components tested and verified operational.
Oak Creek, WI 53154
Oak Creek, WI - Performed routine tune-up on furnace, inspecting electrical components and connections. Examined control boards, wiring, and fan assembly for proper operation. All components were found to be in normal working condition with no signs of damage or corrosion.
Adriel H.
Adriel H. Checked in
Performed routine tune-up on furnace, inspecting electrical components and connections. Examined control boards, wiring, and fan assembly for proper operation. All components were found to be in normal working condition with no signs of damage or corrosion.
Oak Creek, WI 53154
Oak Creek, WI - Performed comprehensive HVAC system tune-up including inspection of furnace interior components. Verified proper electrical connections to control board and examined wiring integrity between blower motor assembly and circuit board controls. Cleaned accessible components and ensured all colored wiring connections (green, red, yellow, white, orange) were secure and properly terminated at appropriate control points.
Adriel H.
Adriel H. Checked in
Performed comprehensive HVAC system tune-up including inspection of furnace interior components. Verified proper electrical connections to control board and examined wiring integrity between blower motor assembly and circuit board controls. Cleaned accessible components and ensured all colored wiring connections (green, red, yellow, white, orange) were secure and properly terminated at appropriate control points.
Oak Creek, WI 53154
Successfully installed a Mitsubishi H2i heat pump system with the outdoor unit properly mounted on a concrete pad and secured to the residence. System was evacuated to 108 microns as verified with Yellow Jacket digital vacuum gauge, ensuring proper dehydration of the refrigerant circuit before commissioning. All electrical connections were completed according to manufacturer specifications with required safety measures implemented.
Successfully installed a Mitsubishi H2i heat pump system with the outdoor unit properly mounted on a concrete pad and secured to the residence. System was evacuated to 108 microns as verified with Yellow Jacket digital vacuum gauge, ensuring proper dehydration of the refrigerant circuit before commissioning. All electrical connections were completed according to manufacturer specifications with required safety measures implemented.
CJ K.
CJ K. Checked in
Successfully installed a Mitsubishi H2i heat pump system with the outdoor unit properly mounted on a concrete pad and secured to the residence. System was evacuated to 108 microns as verified with Yellow Jacket digital vacuum gauge, ensuring proper dehydration of the refrigerant circuit before commissioning. All electrical connections were completed according to manufacturer specifications with required safety measures implemented.
Oak Creek, WI 53154
Performed assessment for replacement of existing outdoor condenser unit showing significant snow accumulation and potential winter weather damage. Evaluated current system which includes 2" Cresline CPVC DWV Schedule 40 plumbing in basement utility area. Recommended replacement with appropriately sized unit to be installed on existing concrete pad with proper electrical connections to junction box.
Performed assessment for replacement of existing outdoor condenser unit showing significant snow accumulation and potential winter weather damage. Evaluated current system which includes 2" Cresline CPVC DWV Schedule 40 plumbing in basement utility area. Recommended replacement with appropriately sized unit to be installed on existing concrete pad with proper electrical connections to junction box.
Josh V.
Josh V. Checked in
Performed assessment for replacement of existing outdoor condenser unit showing significant snow accumulation and potential winter weather damage. Evaluated current system which includes 2" Cresline CPVC DWV Schedule 40 plumbing in basement utility area. Recommended replacement with appropriately sized unit to be installed on existing concrete pad with proper electrical connections to junction box.
Oak Creek, WI 53154
Performed annual maintenance service on Carrier furnace in mechanical room. Conducted combustion analysis with Sauermann gas analyzer, measuring O2 and CO2 levels (CO2 at 0.96%) to verify proper combustion efficiency. System is operating correctly with no issues detected.
Performed annual maintenance service on Carrier furnace in mechanical room. Conducted combustion analysis with Sauermann gas analyzer, measuring O2 and CO2 levels (CO2 at 0.96%) to verify proper combustion efficiency. System is operating correctly with no issues detected.
Josh V.
Josh V. Checked in
Performed annual maintenance service on Carrier furnace in mechanical room. Conducted combustion analysis with Sauermann gas analyzer, measuring O2 and CO2 levels (CO2 at 0.96%) to verify proper combustion efficiency. System is operating correctly with no issues detected.
Oak Creek, WI 53154
Conducted site evaluation for HVAC replacement at residential property. Current system shows age-related deterioration with insufficient insulation on existing ductwork in basement mechanical room. Exterior assessment revealed snow-covered condenser unit with protective cage that will require replacement. Recommended full system replacement including new energy-efficient air handler, properly insulated ductwork, and appropriately sized condenser unit with modern refrigerant standards.
Conducted site evaluation for HVAC replacement at residential property. Current system shows age-related deterioration with insufficient insulation on existing ductwork in basement mechanical room. Exterior assessment revealed snow-covered condenser unit with protective cage that will require replacement. Recommended full system replacement including new energy-efficient air handler, properly insulated ductwork, and appropriately sized condenser unit with modern refrigerant standards.
Dave V.
Dave V. Checked in
Conducted site evaluation for HVAC replacement at residential property. Current system shows age-related deterioration with insufficient insulation on existing ductwork in basement mechanical room. Exterior assessment revealed snow-covered condenser unit with protective cage that will require replacement. Recommended full system replacement including new energy-efficient air handler, properly insulated ductwork, and appropriately sized condenser unit with modern refrigerant standards.
Oak Creek, WI 53154
Performed routine HVAC tune-up service which included inspection and evaluation of the system. Replaced heavily soiled air filter that showed significant dust accumulation. Temperature readings with digital thermometer confirmed system is operating within normal temperature range at 102.9°F.
Performed routine HVAC tune-up service which included inspection and evaluation of the system. Replaced heavily soiled air filter that showed significant dust accumulation. Temperature readings with digital thermometer confirmed system is operating within normal temperature range at 102.9°F.
Carlos R
Carlos R Checked in
Performed routine HVAC tune-up service which included inspection and evaluation of the system. Replaced heavily soiled air filter that showed significant dust accumulation. Temperature readings with digital thermometer confirmed system is operating within normal temperature range at 102.9°F.
Oak Creek, WI 53154
Performed comprehensive inspection of bathroom plumbing components including examination of metal water supply line with shutoff valve connected to porcelain fixture. Inspected under-sink drainage system consisting of PVC pipes, joints, and water flow control valves for proper function and potential leaks. All components appeared functional with no active leaks detected, though minor aging observed on metal surfaces.
Performed comprehensive inspection of bathroom plumbing components including examination of metal water supply line with shutoff valve connected to porcelain fixture. Inspected under-sink drainage system consisting of PVC pipes, joints, and water flow control valves for proper function and potential leaks. All components appeared functional with no active leaks detected, though minor aging observed on metal surfaces.
Kyle L.
Kyle L. Checked in
Performed comprehensive inspection of bathroom plumbing components including examination of metal water supply line with shutoff valve connected to porcelain fixture. Inspected under-sink drainage system consisting of PVC pipes, joints, and water flow control valves for proper function and potential leaks. All components appeared functional with no active leaks detected, though minor aging observed on metal surfaces.
Oak Creek, WI 53154
Performed scheduled maintenance service on HVAC system. Inspected and tested control board components, checking terminal connections and wire integrity. Verified proper operation of control interface and electronic assembly with particular attention to the labeled components and connection points.
Performed scheduled maintenance service on HVAC system. Inspected and tested control board components, checking terminal connections and wire integrity. Verified proper operation of control interface and electronic assembly with particular attention to the labeled components and connection points.
Carlos R
Carlos R Checked in
Performed scheduled maintenance service on HVAC system. Inspected and tested control board components, checking terminal connections and wire integrity. Verified proper operation of control interface and electronic assembly with particular attention to the labeled components and connection points.
Oak Creek, WI 53154
Responded to customer complaint of burning smell and smoke from 10-year-old Carrier furnace. Upon thorough inspection of the Carrier Infinity system, including blower components, motor housing, and ductwork, no evidence of smoke source or operational issues was detected. Visual inspection confirmed proper installation of all mechanical components and PVC venting system. No service actions required.
Responded to customer complaint of burning smell and smoke from 10-year-old Carrier furnace. Upon thorough inspection of the Carrier Infinity system, including blower components, motor housing, and ductwork, no evidence of smoke source or operational issues was detected. Visual inspection confirmed proper installation of all mechanical components and PVC venting system. No service actions required.
Josh V.
Josh V. Checked in
Responded to customer complaint of burning smell and smoke from 10-year-old Carrier furnace. Upon thorough inspection of the Carrier Infinity system, including blower components, motor housing, and ductwork, no evidence of smoke source or operational issues was detected. Visual inspection confirmed proper installation of all mechanical components and PVC venting system. No service actions required.
OAK CREEK, WI 53154
Performed semi-annual gas furnace tune-up service. Conducted electrical testing with multimeter (SC680) checking microamp readings (3.8 μA) indicating proper flame sensing operation. Inspected Carrier furnace system including venting, PVC exhaust/intake pipes, and condensate drainage. All components functioning properly with no issues identified.
Performed semi-annual gas furnace tune-up service. Conducted electrical testing with multimeter (SC680) checking microamp readings (3.8 μA) indicating proper flame sensing operation. Inspected Carrier furnace system including venting, PVC exhaust/intake pipes, and condensate drainage. All components functioning properly with no issues identified.
Carlos R
Carlos R Checked in
Performed semi-annual gas furnace tune-up service. Conducted electrical testing with multimeter (SC680) checking microamp readings (3.8 μA) indicating proper flame sensing operation. Inspected Carrier furnace system including venting, PVC exhaust/intake pipes, and condensate drainage. All components functioning properly with no issues identified.
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.