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Thielmann Heating, Cooling & Plumbing

4.9
(540 reviews)

Business Details

11512 N Port Washington Rd, Mequon, WI
53092, United States
(262) 292-4319
https://thielmannheating.com/mequon?utm_source=gmb&utm_medium=organic&utm_campaign=GMB+Mequon+WI

About

HVAC ContractorHeating ContractorAir Conditioning ContractorBoiler SupplierWater Heater SalesWater Heater ServiceAir Quality ConsultantPlumberWater Softening Equipment SupplierBackflow Prevention
Since 1929, Thielmann Heating, Cooling & Plumbing has been Southeastern Wisconsin’s trusted choice for dependable comfort and quality service. Our experienced team provides expert heating, cooling, and plumbing solutions for homes and businesses, including the installation, repair, and maintenance of high-efficiency furnaces, air conditioners, ductless mini-splits, and indoor air quality systems. We also specialize in plumbing services such as water heater replacement, water treatment systems, and leak detection and repair. Thielmann is committed to delivering the highest level of craftsmanship with over nine decades of experience to every job — ensuring your comfort, safety, and peace of mind year-round.

Location

Thielmann Heating, Cooling & Plumbing
11512 N Port Washington Rd, Mequon, WI
53092, United States

Hours

MondayOpen 24 Hours
TuesdayOpen 24 Hours
WednesdayOpen 24 Hours
ThursdayOpen 24 Hours
FridayOpen 24 Hours
SaturdayOpen 24 Hours
SundayOpen 24 Hours

Reviews

4.9
540 reviews
5 stars
522
4 stars
8
3 stars
3
2 stars
3
1 star
4
  • RR
    rdt3891
    1 day ago
    5.0
    Nicholas H came out today to take a look at my a/c unit that wasn’t cooling very well. He was friendly, respectful and knowledgeable. He went over the issues, gave me options and fixed everything up. I’ll definitely request Nicholas the next time I need any help.
  • PE
    Paul Egan
    Jul 1, 2026
    5.0
    AC failure in midst of heat wave, and Thielmann responded in less than two hours. AC is now functioning while we wait for a replacement part, and our home should be cool until the heat wave is over in a few days. Great service by the technician.
  • TL
    Tim Lemont
    Jun 30, 2026
    5.0
    Serviceman diagnosed the problem with our newly installed A/C unit from last fall. Apparently they were unable to perform the startup of the unit back then because the outside temperature was too low. The Serviceman filled the refrigerant to the correct level and calibrated the thermostat, which was reading too high of a level. I was very pleased with the work this Serviceman performed but I am disappointed that the Thielmann installers from last fall didn’t put on their schedule for this Spring to return to do the proper startup of the A/C unit.
  • SG
    Sarah gonzalez
    Jun 24, 2026
    5.0
    I had my 30 year old AC replaced by Thielmann after getting multiple quotes. The process from start to finish was excellent. Rudy came to give me an estimate and was super professional, took the time to explain the recommended equipment, was NOT pushy and made me feel comfortable moving forward with the install. James P came week later to install and everything went smooth. They cleaned up after themselves, the unit was placed perfectly and it all works great. I would highly recommend these guys to anyone! Price was also excellent!
  • DB
    Darren Brimley
    Jun 22, 2026
    5.0
    McKenzie was very polite, knowledgeable, and very professional young man. He came in. Did his assessment, Discovered the problem and repair the issue right away. I am very satisfied with the work. Thank you very much for the fast honest service. From me calling there office to schedule an appointment to the end of the service took less than 3 hours.

Frequently Asked Questions About Thielmann Heating, Cooling & Plumbing

What is the address of Thielmann Heating, Cooling & Plumbing?

Thielmann Heating, Cooling & Plumbing is located at 11512 N Port Washington Rd, Suite 201K, Mequon, WI 53092, US.

What are the operating hours of Thielmann Heating, Cooling & Plumbing?

Thielmann Heating, Cooling & Plumbing is open 24 hours a day, 7 days a week.

Brand Certified Facts from Thielmann Heating, Cooling & Plumbing

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Certified July 05, 2026Yext Knowledge Graph
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