Furnace Service In New Berlin, Oak Creek & Hartford, WI
Same-Day Service
Heating and cooling emergencies happen when you least expect them. Contact the professionals at The Thielmann Group to assess and fix the situation you're dealing with. We have the necessary skills and tools to fix your system so you can safely use it once again. Call the Thielmann team at (262) 299-6197 to get emergency HVAC services in Southeast Wisconsin.
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Dependable Furnace Services in Southeastern Wisconsin

Wisconsin winters can be brutal, especially if your home’s furnace isn’t producing sufficient heat. The Thielmann Group provides both commercial and residential furnace services throughout Southeastern Wisconsin.

Our NATE-certified technicians offer furnace repairs, replacement and installation, and annual maintenance to keep your furnace running reliably. We service all brands and provide same-day services.

Schedule quick and efficient furnace services for your Wisconsin home. Call (262) 299-6197 to get started.

HVAC technician installing a gas furnace in a Wisconsin home

Reliable Furnace Installation & Replacement

If your furnace is over 10 years old or needs frequent and expensive repairs, it may be time to consider a replacement. When preparing for a furnace installation, choosing the right installer is as important as choosing the right furnace. The expert technicians at The Thielmann Group have the training and tools to ensure proper installation for lasting results.

Ensure your home is prepared for the Wisconsin winter with furnace replacement from The Thielmann Group. Call (262) 299-6197 today.

Gas vs. Oil Furnaces: How To Choose

While gas and oil furnaces are widely used in the region, many homeowners prefer gas furnaces because they are more efficient and burn cleaner. If you’re in the market for a replacement heating system and your home already has an oil furnace, it is usually simpler and cheaper to replace it with another oil furnace.

It’s not impossible to convert to gas, especially if you already have significant renovations planned for your home. The Thielmann Group can answer additional questions and help determine which system suits your house, needs, and budget.

Same-Day Furnace Repair

A broken furnace is not only uncomfortable but can also be dangerous. That’s why we offer quick and reliable same-day furnace repair services. If your furnace shows any of these signs, it likely needs a repair:

  • Won’t turn on
  • Blowing cold air
  • Unusual sounds or odors
  • Short or frequent cycling
  • Excessive dust around your home
  • Unexplained rise in energy bills

Schedule same-day furnace repairs with the experts at The Thielmann Group. Call us at (262) 299-6197 to get started.

Preventative Furnace Maintenance

We provide thorough furnace maintenance services to ensure your heating system runs optimally when needed. By scheduling a tune-up and inspection each fall, you’ll reduce repair needs and unexpected breakdowns, maximize the life span of your system, and make sure the system is running as efficiently as possible, which will save on monthly energy costs.

Prevent costly breakdowns by scheduling furnace maintenance today. Call The Thielmann Group at (262) 299-6197.

Why Choose The Thielmann Group?

Founded in 1929, The Thielmann Group has offered reliable heating and cooling in Wisconsin for over 90 years. Our background-checked technicians are licensed and insured, offering upfront pricing and free replacement estimates. We also offer financing options and discounts for military personnel, veterans, and seniors.

Choose The Thielmann Group for all your furnace needs in Southeastern Wisconsin. Call (262) 299-6197 today.

Frequently Asked Questions

We recommend changing your filter at least every one to three months, depending on how often you use the furnace. A clogged and dirty filter will impact your furnace’s ability to heat your home effectively, so you must change it before it’s filthy.

You can expect the average furnace to last 15 to 20 years with routine maintenance.

If your furnace is more than 15 years old and needs frequent service, or if a necessary repair will cost at least 50% of the cost of a new furnace, your money is better spent installing a replacement.

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What To Expect

Discover the Thielmann Group 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

The Thielmann Group 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

The Thielmann Group 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'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.

They performed an April Air install for us. Very professional, fast, knowledgable and responsive. Best price compared to the other places I called. They thought there may be difficulties installing due to our furnace set up, but were still willing to come out and try and…

Jenni S.

Jenni S.

The Thielmann group team was professional, knowledgeable, and on time. They did a fantastic job at a reasonable price. From our first encounter, we could understand how experienced the group was. There were no issues, and the new furnace worked perfectly. I highly recommend them.

Vincent R.

Vincent R.

Thielmann Group installed a new furnace and heat pump for us. We have been using them for HVAC maintenance for several years and were always happy with their service. We got quotes for the new system from a few companies and we were pleased that they…

Laurie K.

Laurie K.