Thielmann Heating, Cooling & Plumbing

Thielmann Heating, Cooling & Plumbing A+ Rated by the BBB; how can we help you? Thielmann Heating & Cooling has been providing trusted HVAC services across Southeastern Wisconsin since 1929.

With over 90 years of experience, The Thielmann Group offers fast and reliable heating and air conditioning services to both residential and commercial projects. They specialize in heating, cooling, and indoor air quality systems for residential and commercial properties, offering installation, repair, and maintenance with a focus on reliability and customer satisfaction.

Celebrating Labor Day with our dedicated Thielmann team. Here's to the hard work and commitment that keeps us running st...
09/07/2026

Celebrating Labor Day with our dedicated Thielmann team. Here's to the hard work and commitment that keeps us running strong!

It's that time of year in Southeast Wisconsin, the swing from hot to cold happens fast. One week you're still running th...
09/06/2026

It's that time of year in Southeast Wisconsin, the swing from hot to cold happens fast. One week you're still running the AC, the next you're reaching for the thermostat to turn on the heat. Let's make sure your heating and cooling systems can keep your home right in the middle, no matter what the weather does. A quick seasonal check now means no surprises when the temperature drops for good.

📞 262-238-3118 | https://bit.ly/4sxupa1

Breathe easy this fall. For a limited time, get a free premium indoor air quality package, an over $1,500 value, with th...
09/05/2026

Breathe easy this fall. For a limited time, get a free premium indoor air quality package, an over $1,500 value, with the purchase of a new furnace and AC system from Thielmann. Advanced filtration effectively removes harmful particles from your air, reduces allergens and pollutants for better respiratory health, and helps maintain a more comfortable living environment for you and your family. It's the easiest way to upgrade your Southeast Wisconsin home's comfort and indoor air quality at the same time. Book now before this offer ends.

📞 262-238-3118
💰 Promos: https://bit.ly/4sq3Hzd

Uneven temperatures between your upstairs and downstairs? We hear you. "Stand up guy who provided good feedback about ho...
09/04/2026

Uneven temperatures between your upstairs and downstairs? We hear you. "Stand up guy who provided good feedback about how to get our upstairs downstairs closer to the same temperature during both winter and fall. He also looked at notes I had taken 4 years ago regarding feedback another HVAC guy (from a different company) gave me about replacing my furnace and gave me some pros and cons with those suggestions." — Andrew D., Middleton, WI. That's the kind of thoughtful, honest HVAC advice you get from Thielmann's Southeast Wisconsin technicians. Call today to experience your own top-notch service from us! ☎️ 262-238-3118 | 🔗 https://bit.ly/4sxupa1

What's more frustrating than a leak you can't find? At Thielmann, we specialize in fast, accurate leak detection to prot...
09/03/2026

What's more frustrating than a leak you can't find? At Thielmann, we specialize in fast, accurate leak detection to protect your Southeast Wisconsin home with minimal disruption. Watch for the signs: standing water on your lawn, a sudden spike in your water bill, the sound of running water with no visible source, or wet spots on ceilings, walls, or floors. Don't let a hidden leak turn into major water damage. Contact us today to schedule a plumbing inspection and safeguard your home.

📞 262-238-3118
📅 Schedule: https://bit.ly/41qEFoF

Get ready for fall with amazing September deals on heating, cooling, and plumbing services from Theilmann's! Enjoy disco...
09/02/2026

Get ready for fall with amazing September deals on heating, cooling, and plumbing services from Theilmann's! Enjoy discounts, free opinions, and special offers. Contact us today to take advantage of these limited-time promotions! 🍂❄️🔧Call us, 262-238-3118 or look for our promos here: https://bit.ly/4sq3Hzd

It's Home Tips Tuesday! As summer winds down in Southeast Wisconsin, a little maintenance now saves you from bigger head...
09/01/2026

It's Home Tips Tuesday! As summer winds down in Southeast Wisconsin, a little maintenance now saves you from bigger headaches once the weather turns. Run through this end-of-summer checklist: schedule a professional inspection, swap out your air filters, inspect the roof, store outdoor furniture, insulate exposed pipes, test your smoke and carbon monoxide detectors, install a programmable thermostat, and seal up entry points around doors and windows. A few small tasks now keep your home running smoothly through fall and winter. Need help checking any of these off your list? Thielmann's team is here for it.

📞 262-238-3118
📅 Schedule: https://bit.ly/41qEFoF

Kids are back in school, routines are back in full swing, and your home should be one less thing on your plate. Between ...
08/31/2026

Kids are back in school, routines are back in full swing, and your home should be one less thing on your plate. Between morning showers, packed lunches, and busy evenings, a reliable furnace and dependable plumbing keep your Southeast Wisconsin household running smoothly all fall. If anything's been acting up around the house this summer, now's a good time to get it handled before the school year picks up speed.

☎️ 262-238-3118 📅 Schedule: https://bit.ly/41qEFoF

08/29/2026

Waking up with a dry throat or scratchy cough? Your AC ducts could be the direct cause, and sometimes it's your AC unit itself. Dirty air filters, naturally dry air from your AC removing humidity, and mold building up near your system can all affect the indoor air quality in your Southeast Wisconsin home. A few fixes: change your air filters every 1 to 3 months and check around your system for leaves or mold buildup. Contact Thielmann for a full air assessment and start breathing easier. 📞 262-238-3118

When other plumbers won't return your call, Thielmann answers. "I called several plumbers to help with a couple of plumb...
08/28/2026

When other plumbers won't return your call, Thielmann answers. "I called several plumbers to help with a couple of plumbing issues. If they returned my call at all, I was told they were too busy. Then I called Thielmann Heating, Cooling & Plumbing, and they sent John J. He quickly resolved my toilet issue, and before he left, I had already approved a quote and scheduled the second repair. John did excellent work... He was courteous, professional, and took the time to answer my questions. I recommend Thielmann Heating, Cooling & Plumbing, and I'll recommend them to my friends and family." — Bill B., Burlington, WI. That's the kind of responsive plumbing service Southeast Wisconsin homeowners can count on. https://bit.ly/4sxupa1 | 📞 262-238-3118

Address

17020 W National Avenue
New Berlin, WI
53151

Telephone

+12627862000

Website

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