Thielmann: I'll try to give a brief background. The furnace (unit also has AC component) in my condo was having white smoke/steam come out of the external vent during some of the extremely cold weather we were having. Even though my furnace was not making any unusual noises, smells, or setting off my carbon monoxide detector, I was still concerned as no other condos in my building or nearby buildings were having the smoke/steam. The employee that initially inspected by furnace (Carlos?) informed me that the heat exchange was clogged and would require me to repair the furnace or purchase a whole new unit (I opted for a whole new unit based on its age). Carlos gave me the impression there was no rush and that it was not something that necessarily needed to be done immediately. When the second employee (Dave?) came later that day to take measurements and verify the replacement unit needed, he made it seem almost emergent and began to wonder aloud if he needed to shut my furnace off that day. The stark contrast between the two was alarming and created a bit of a trust issue on who to believe. Carlos seemed a little green and Dave seemed like more of a veteran. Dave eventually determined it did not need to be shut off as no carbon monoxide was entering my condo. The whole experience did create a bit of a panic for me though, so I quickly accepted the only available appointment within the following two weeks. It was convenient that they could get it replaced just five days later, but if it truly wasn't an emergency then I would have liked a little more time to verify I was getting the best price as it wasn't cheap (to give you an idea this is the largest purchase I've ever made behind my home, education, and car). They do offer payment plans that were easy to enroll in, one of which has 0% interest if paid off within a year. I'm not trying to throw anyone under the bus, but I can tell they really want an honest review as I've received multiple texts and emails asking to leave one. The crew that showed up on the morning of 12/24 to install the new unit were quick and efficient. They were respectful of my property and explained the new thermostat to me. All the employees were friendly, including the ones running the office over the phone (Micah?). read more

Thielmann Heating, Cooling & Plumbing - Heating & Air Conditioning/HVAC Near Me - New Berlin, Wisconsin

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Thanks to the flooding my hot water heater is shot! I called Thielmann (since they previously were Ross and that was the service I use to use) they came out to inspect my pilot light situation and unfortunately just the inch of water I had is the right amount needed to short circuit things. He also made sure to check out my furnace to ensure there weren't any issues with that - I knew the AC was working fine but he ran a service check on the heat as well. I am a little confused as to what's happening for the next appointment I've set up - is this to gain an estimate on a new heater or to actually install one which is the reasoning for 3 versus 4 star. Tried calling back to find out but couldn't get ahold of someone. I'd like to get a few quotes of course for something like that/have a discussion about the types of options for water heaters. read more

Shane Peck came to our home today and checked out the air conditioner for the coming season. Everything was O. K. and he was very helpful, turning on the outside water for the season, something I cannot do these days. We were charged $101.66 for the service which was fine with us. We have had Shane as our service person a few times now, so we had a good visit again. Ron F. read more

Repair was fine (only 3 days out at this point). Bill was $900, no parts and labor breakdown despite asking for part cost upfront and asking again after the service. Googled the part (blower motor), they go for about $150. Took a little over 1 hr of labor. He arrived 1045 and was done just past noon. Likely paid $500-600/hr for labor, which is about 3-4x what it should be. 6/16 update: Got a call from them and the summary of the call was "well you agreed to the quote, didn't you?" and "i don't know where you'd see a blower motor for $150, all of ours are over $800." I checked again today on home depot and granger and they range $80-200. Full blower units can go that high, but that was not what was replaced, as the mechanic himself told me that he dusted off my existing fan. read more

Excellent experience all around! I needed a new AC unit and reached out to multiple companies in the area but received the most in-depth information from Thielmann to feel confident about not only the unit I was buying but the service I would receive going forward. Upon installation, the guys were friendly, efficient and took the time to explain the new unit to me, making sure to answer any questions. I also had my ducts cleaned and that guy was also incredibly informative throughout the process. Overall, communication was great and I always felt like I made the right decision going with Thielmann for the best service and AC unit in the industry! read more

CONSUMERS: Please do your research, examine parts, get quotes, understand what you are purchasing, and ask questions. While the techs at Thielmann are respectful and helpful, the business model feels like price-gouging. On Monday, my family had a capacitor replaced (the part is $20-50 online), and the installation was about 45 minutes. Our bill stated the capacitor was $299.99 + $95 "diagnostic fee;" see image for receipt. A separate, local, licensed, and insured contractor quoted us $60 for the same part, later in the week. Thielmann's rep said, "These prices are consistent throughout Wisconsin," and that we're, "paying to keep it on the truck." They were not interested in my concern. I will be reposting this in as many places as possible. DO YOUR HOMEWORK! read more

BEWARE! Thielmann tech Jeremy "serviced" a perfectly functioning boiler twice and both times, seemed to cause more damage. First time, in 2023, he said it needed a new valve (to the tune of $588) -- which is now leaking and needs to be replaced yet again. Immediately following routine service in 2024, the boiler stopped functioning, requiring $2K in emergency service and significant repairs (replacement of motherboard, etc.) by another company. It's clear Thielmann (or at least this tech) are not equipped to service boilers -- make sure to do your research before using them. read more

Excellent service. Install was quick. .They removed the old furnace and air conditioner leaving no mess. Cleaned entire area and more after installation. Outstanding service. read more

I have a noise in my basement ceiling every time the A/C fan turns on. Sounds like an electrical welder. I suspect there is some arc or sparking happening behind the drywall in the ceiling. We've had issues in the past with pests chewing up the cables. Shane P came over to do an inspection. Checked the furnace, and the fan outside, ran electrical tests. Also performed furnace maintenance, fixed a water leak and changed the humidified pad. Tried a couple of times to reproduce the issue, and eventually we heard it. I asked him to get a snake-camera and look into the crawl-space. He didn't see anything up there, said nothing to worry about -- probably vibration, but I'm not convinced. With temperatures dropping it's harder to get the A/C to turn on. I'll probably wait until spring and maybe get a licensed electrician to inspect the power cables and isolate them in a conduit if necessary. Overall the experience was good, but it would have been better if we found the root cause of the noise. Total cost consisted of diagnostics and furnace maintenance charges. read more

Our AC unit died and I saw these guys got good reviews so I gave them a shot. Really good idea. They were super responsive for the repair. We decided that since our AC and furnace were over 25 years old that we'd replace both units. Again they were ver responsive and refunded our service charge. I'd use them again for sure read more

Great personal service and response! They help us thru the process of selecting the right unit for our house and also to apply for our maximum rebates. Steve is the best. read more

we just bought this house this year. i called them because it appeared that the previous owner used them. I first called them out because my AC was not cooling. the technician told me it was low on freon and put some in. i asked him if that meant that it had a leak, he said yes. i said i would like him to find it. he said he did not have the die needed to check. then he ran out of freon and was running back to the shop, i said bring some die back. when he came back, he said they were out, and it cost $200.00. before he left, i said, it is not blowing cold. he put his hand next to the vent and said yes it was. the next day, i called them back complaining. they sent someone out he changed something, and it started working. i called yesterday to get a quote for fixing the leak, they wanted to charge a service fee for coming out. they did not care what happened in the past. read more

They did a duct cleaning in our home. I found good reviews of them online and thought they did a nice job. We were long overdue and their pricing was fair. I would suggest them to others. read more

We have been using Thielmann and Son since we moved to the area and have not had any complaints. They are knowledgeable and professional and address all of our HVAC needs. They have always answered any question in detail. If any repairs are need they ask first but also provide options. read more

Our A/C went out in the middle of summer and as I have used Thielmann before, I called them for a service call. Unfortunately my condenser was dead and we needed a new condenser unit outside (the old one was approaching 20 years old). I ordered a new unit and the Team arrived on the day agreed to during a very busy season for them and the install went flawlessly. They were professional and respectful of my property both inside and out. Will continue to use Thielmann for my HVAC needs and highly recommend them. read more

They were with us every step of the way and made us feel like we've done this before. The in-house financing was key but the information they provided made our decision making process all the more streamlined and stress free. I recommend Thielmann and Sons if your looking to beat the heat this summer and want to wakeup in the hotel room that is your home. I already have it planned to schedule annual maintenance with them to help ensure that my warranty is offered. Money well spent...Yaap!!! Mario Britton read more

My entire experience with Thielmann has been seamless from meeting with salesman Wayne to the install of my furnace. The techs were friendly and courteous and arrived on time. I was also impressed with the friendliness and professionalism of their office staff. I highly recommend Thielmann! read more

My family of 6 was w/o heat. Called late afternoon and they found a way to send someone out to look and quote me. Just amazing to see the great reviews and then get someone out that fast was so needed w/ no heat. The Gentlemen took the time to explain the benefits of high efficiency and the cons. Also, the pros/cons of the regular boiler system we already had. Told them I needed to confer w/ my wife that night. I contacted a day later and said please schedule me at the earliest for installation. I was worried as the chap mentioned they had to ship the boiler from Ohio. Upon hearing back from the office the guy already had the unit on its way and tentatively scheduled me prior to my calling. Man what a relief. The very next day after they received the unit they installed the unit. Installation: Guys were professional, and laid down tarps/ carpet plastic everywhere. All the work getting the old boiler out and draining, and prepping for the new unit was done. The electrician came and was personable, professional, and quick. The boiler team was then allowed to finish connecting the copper and all connections. Afterwards, they weren't in a hurry to get out of my house. They cleaned EVERYTHING up and then some. These guys were great. Glad to have found a reliable company. Honest people. Fair. Reliable again because they returned my calls, showed up when they said they would, and left my house better than when they came. THANK YOU! My family had heat that night. Boy was it glorious. Front Office: Super kind, helpful, and expedited all the schedules, and questions I had, and even when I made a mistake on the paperwork they were very pleasant and patient. Short story, long: I would pay more for this service but they aren't out gouging people either. Prices were in line w/ most, lil cheaper than some but were not more expensive. Hope that helps someone like me, reading these reviews. If you are on the fence, stop. Call these folks. Kim, Steve, Chris THANK YOU read more

Prompt and Excellent service...I would highly recommend! They were able to service my air conditioner within 2 days of calling them and had it fixed within 2 hours of arrival. read more

Very professional, prompt response starting with the initial call to the installation. Very competitive pricing. I highly recommend them.

Great service from the estimate through the install. Steve gave us more than one option for a furnace and a/c unit. (Other contractors only gave us one choice) Tim & Dylan were professional during the install process. A few modifications were required due to the original system, and they took their time and completed the job correctly. Tim was great in explaining our new thermostats. read more

After a call with someone from there I decided to change my review. I'm still up in the air with them, they were very defensive and admitted that their call system is not working and they are changing it. They stated on the phone that the part needed would've costed around $700 for them to get the first night compared to $360 on Wednesday, I already spent about $200 on space heater so I would've spent the extra money to get the part on Friday and had it fixed right then and there. Under normal business their part would've been delivered on Tuesday so since the part was backed up that was why it took until Wednesday to get the part, so the guy on the phone said the technician technically did not lie. I am still on the fence about this company and I'll see how the next interaction goes. I ordered a new A/C unit through them, a few months later it stopped working and took some time to get a hold of someone after leaving a message that they never received. Guy comes and says there's nothing wrong and cleans some sensors and I get charged a service fee. Come a few days ago on the coldest day of the year, it stops working again, called them and they send someone on 12/23/2022 and he says it's a gas valve and they can change it on Tuesday 12/27/2022. So I have to get a bunch of space heaters to keep my 7 month wife and 2.5 year old daughter warm during the coldest weekend in WI. Tuesday comes and they do not have the part still so they have to come on Wednesday. The guy comes and has to get the model number to get the right part. So it took 5 days during the coldest weekend for them to do something and almost $500 later. I will definitely not be using this company again for anything in the future. ***Update*** This company is tied to Roth Heating and Cooling. My system continues to fail every few months (well this time it took a week to fail after they "fixed it"). We continually have to wait for parts to come in so we have to suffer in the heat or cold for a couple of days. Last week we were charged around $900 for them to fix it and now a week later it's not working again. A guy just came in and charged us $250 for diagnostic and we do not know how much the part is going to be but we have to suffer in the heat until Monday when they get the part. This business just seems shady and untrustworthy. I tried to give them the benefit of the doubt but since using them our unit continually fails and we are spending a lot of money for them to keep coming and "fixing it". read more

I experienced Thielmann & Son's service through my Costco membership. If that does not tell you something, allow me to expand. From the moment of receiving a call from their front desk to the completion of the project, every bit was clock work professional, clean, and honest. Measurements and size of the HVAC system, explanations of what each term means and how it impacts the home, energy consumption, etc were all provided with a lot of patience. I had enough time to do my own research regarding pricing, current labor, comparison of brands and models, etc. I am impressed by these folks and their business model. The work was spot on, clean and surgically executed. I am a loyal customer now for the annual maintenance and if other needs arise. Keep up the good work Thielmann and Sons. read more

I have been using them for 17 years. They were very helpful in my furnace and AC upgrades.

I called Thielmann because my furnace stopped throwing out hot air (yikes!). The lady on the phone was super sweet and polite, and was able to schedule an appointment within the same morning. I was surprised that they were able to accommodate me so fast, but that goes to show their efficiency. The technician was great. He wore his mask the whole time, and was super professional the whole time. He showed me the problem and what he did the fix the furnace. He also gave me good quotes on future updates/projects in my house. 5 stars all around. I will definitely call them again if needed, and would recommend this company to anyone. Thank you Thielmann and Sons! read more

I am visiting my parents from out of town. My dad is 85 and my mom is 75. So I am commenting here not as an actual customer, but as the concerned son of their customers, my elderly mom & dad. Initially the star rating I gave was lower, but I am now glad to be able to give a 4@-star rating. When the Thielmann & Son team arrived at my parents' home, my parents set the stage by greeting them without masks, and allowing them into their home without anybody wearing masks. Subsequently, the team didn't wear masks while in my parents' home. I have no doubt that if my parents were wearing masks, and had asked the team to wear masks, that the Thielmann & Son team would have gladly obliged. In hindsight, my parents acknowledge that they should have been wearing masks, themselves, and that they should have asked the team to wear theirs. Nonetheless, my earlier lower star-rating was b/c I believed that a professional service company serving the general public ought to have the policy and practice to wear masks in peoples' homes, regardless of whether the homeowners were wearing them. I was especially disappointed/frustrated/angry b/c Wisconsin's new covid-19 cases have spiked this week (leading the nation at #4), and my dad's age category has a 15% mortality rate when they have covid-19. Today I edited my rating to 4-stars, and here's why: 1) Thielmann & Son reached out to ask about the experience and review. 2) Thielmann & Son listened to my perspective intently, respectfully, and heard where I was coming from. 3) My parents acknowledge that they greeted the Thielmann team without masks, and didn't ask the team to put theirs on. 4) Most importantly, Thielmann & Son put out a memo to their entire company that everybody is mandated to wear masks, without exception (including their sub-contractors.) Thielmann & Son does excellent work, and I could not have imagined a more professional, responsible, and kind response to my concerns than what I experienced. However, I can not give a 5-star rating b/c in my view it should not have taken a Yelp/Google review to get them to change to a no-exception mask-wearing policy inside customers' homes. read more

Called for service and was able to get a technician quickly. Our unit needed replacement and we were given a quote on the spot. Installers were then available in a short time also. They arrived on time and made quick work of the replacement. Completely satisfied with every member of the team I've had an interaction with. Highly recommended. read more

I'm not an expert on heating and cooling, but as a homeowner I have had plenty of experience dealing with different contractors over the years. I value my time and I value integrity and respect. These guys were great from start to finish. The salesman was very thorough and explained everything to me in a way that made sense. He didn't try to hand me a sales "pitch". The guys who did the work left the place immaculate. They were very respectful of my home and making sure my animals didn't get out during the in and out. They cleaned up after themselves and when they left everything was working perfectly. The price was very competitive as well. I would recommend. read more

Needed to replace furnace and AC unit . Prompt and courteous service. Willing to answer all my questions. Gave me a very fair price. Found them through Costco in Grafton, WI. read more

Great service from start to finish. Ability to come next day to check furnace during this cold spell we had. Friendly service lady on phone to set up appointment confirming all information. Service men than came, showed up right on time as well very friendly and knowledgeable. Definitely will continue to use this company and recommended to others. read more

we had them replace our old heater and air conditioner. They were on time, knew what they were doing. they went about their business we hardly knew they were here. They cleaned up behind themselves. They were very professional. They explained how the thermostat worked. We will be calling them for annual maintainance or any problems we might have with the units. They offered the best price and the best warranty. Great company to work with, read more

I had my furnace and air conditioner serviced yesterday by J.D. (Jason) . He was very thorough and did a great job. He asked if I had any questions or concerns and answered my questions. Would definitely recommend for furnace and air conditioner tune ups. read more

Wayne came for an inspection to replace my old AC unit out of function. He was on time, provided tons of information, and a quote right away before leaving, answering very thoroughly to all my questions. Out of 4 contractors I've awarded Thielmann because of the quality of their installation: usually everybody sends 1 lead technician plus a helper, not Thielmann who sends instead 2 lead technicians to make sure the job is properly done inside and outside the house! They pull permit, they have their own electrician. That's what I call 360 degrees service and customer care! Moreover their offer was extremely competitive, even more offering a higher trim level than all others! Order is placed and job scheduled for installation this coming Wednesday, I can't wait for it! And I expect great things, being sure I'll have more positive feedbacks to give. Way to go, awesome communication and overall quality: don't hesitate to hire them!!! read more

I have to say - I was super impressed with this company. We knew we needed an HVAC overhaul, and we knew we wanted to use Costco to get it done. Costco contracted Thielmann to come out & quote us. They were upfront, listened to my concerns, and gave us a great package that suited our needs. They scheduled an install about two weeks later, and they had it complete in about 6 hours. They did all the paperwork, dealt with our rebates & were really great to work with. I'd highly recommend! read more

Great sales and service. Sized proper heat pump unit for our over 100 year old home with ra distortion heat. Had problems with summer humidity. Heat pump performed flawlessly during this past hot humid spell. Cools entire 1st floor with a single split system. Professional installers knew what they were doing- coordinated electrical with HVAC work and things went without a glitch. 1st floor is a bit over 1,000 sq ft and the 18,000 btu (1.5 ton) external unit does it's thermodynamic magic in providing adequate cooling to the inside inverter. Sales and service personnel were prompt, courteous, knowledgeable and professional in all phases of sales thru install. Highly recommended! read more

We searched for the best way to cool our old house for several years. We have hot water radiators, so there are no ducts to use for a forced air system. Cost of installing a traditional forced air system was approaching 25K and basement ducts would have been difficult to accommodate. Considered a high pressure system, but lack of empty space to get ducts from attic to ground floor resulted in potential for less than ideal cooling circulation and potential noise problems. Settled on a Minisplit system. Got two bids and both bidders bid a Daiken system. One bidder failed to provide enough information about units to be installed for me to make an informed decision. Thielmann and Son's Brad Smith while quoting about $500 more than his competitor provided a complete proposal. Scheduling was difficult as we were in a heat wave, but technicians from Thielmann showed up on the appointed day, on what was to be a one day install according to Mr. Smith. A full crew of 5 people worked on the first day and made good progress but weren't close to being finished. As they were leaving for the day I was told the office would call to schedule there next work day as they were moving on to another project. When the office called they agreed, after discussion, that they would keep working until the project was completed. The next day Matt and Tyler continued the install. They were meticulous in ensuring everything was installed according to the manual, that everything was on the level and square. The were very considerate of our home, keeping the workspace as clean as possible, and cleaning all debris at the end of the workday. They put in a good day's work, no long lunches, no leaving to buy odds and ends. They showed up to work and did. On the third day four people worked on completing the install and made good progress. On the fourth day Matt and Tyler worked all day and nearly until 9.00PM to finish the job. They cleaned up all debris and left our attic cleaner than they found it. The two Daikin Heads installed on the ground floor cool the whole downstairs. The unit installed in the attic with ducts to each of the rooms cools the upstairs. The unit in the attic and ducts are fully enclosed in insulation to minimize cooling or heat loss. The Daikin system is quiet, after having a forced air system that boomed on and was noticeable when stopping, the quietness of the Daiken system is a pleasant surprise. The outdoor unit is also very quiet. Thielmann and Sons were a bit loose on completion time, but the folks assigned to our install, especially Matt and Tyler, did an outstanding job. The office staff was very easy to deal with. I would hire Thielmann and Sons again with no reservations understanding the job might take longer than estimated. read more

Being a long time home and rental owner, no other company can be more highly recommended. All employees have been prompt, fastidious in all work done, and more than capable in the rapid installation of two high efficiency furnaces at a rental as well as boiler unit servicing in another home. Recently a valve leak was noted with the boiler system and promptly and efficiently corrected. All questions have been honestly answered and addressed, inclusive of an inquiry regarding radon remediation with a HRV system. Special thanks to Brad, Kaycee and Rich for their consistent caring. Thielmann & Son is better than wonderful! read more

The whole deal was nicely done. Meet Brad at a home show, talked with him, he's the owner and sales person. Several months later, we had him quote new furnace and A/C units His price was good, dealing with his office was good, the installers did a nice job, clean install. the people explained what they where doing and how. Very happy with everything, would recommend to anyone. read more