Viessmann Climate Solutions Deutschland Reviews 

Terrible experience with Vitodens 100! After a few months we could not open the water pressure valve and had to change it. After one year we had to change the overflow valve. After 2 and half years (warranty expired!!) the Command Card did not work properly any longer. We wasted 580€ to change all the above plus 3080€ in september 2023 to purchase the heater. A very bad experience from once upon the time prestigeous brand!! Never again !

As my old domestic boiler had seen better days I thought I should invest in something efficient. Having a Viessmann was described to me as having a Mercedes Benz instead of a Ford. It also comes with a 12 year warranty. That is confidence in your product.
My experience is that the Mercedes promises a lot but in fact is hard to live with. If I had chosen something familiar like a Ford all would be good.
The Viessmann It takes configuration but nothing seems to get it right. The Climate Sensor is a dilemma. In the morning it's hot on the back of the house but the climate sensor thinks it's cold so on comes the heating. Then in the evening it's the reverse. So I seek Viessmann advice which was received promptly. It helped to a degree but it cannot solve the issue. So, I ask for recommendations for thermostat to at least have some control on what heat is output and when I want it and not when the Climate Sensor seems to decide I need it. I am advised to use a third party thermostat. I find this strange. Why do Viessmann advise to use a third party device to make their equipment run better.
The Vicare App is limited in use. You can set many things but are restricted to only 3 phases of heating in the day.
So, currently I have a super efficient boiler that uses more gas than my previous old boiler, it hot when it does not need to be then cool when we need heat. I find I'm going to have to work it out. I expected much better.
I'm not a convert yet. I could go back to the engineer that fitted this but I'm not at all convinced all is right.
I wish to make it absolutely clear. The boiler works well and is silent. I'm confident things will be good. You just have to get used to having a different set up.
Despite Viessmann advising to use a third party App I have decided to use a Viessmann Vitotrol 100, It is quite expensive but I really can't rely on the Climate Sensor alone. An example it's 13c outside of the house, Heat required in the house set in the App 21c actual temperature in house 17.9 and radiators are cold. yet the burner is on. This is disappointing.

No service. Once account is locked there is no one to help you to unlock it.

I have a Viessmann vitocal 200-s. I have been away for a couple of weeks and I turned the heat pump off. Now I am ready to go back home and I turned on the heating and the domestic hot water. Unfortunately the compressor does not start. This is not the first time I arrive home and the Viessmann does not start remotely (and my house is cold). I have written to the customer service to explain the problem and to understand if it is a limitation of the heat pump or the Viessmann App itself. I have to say that I own also two Hitachi heat pump, more powerful (they can also heat the wall radiators up to 70°C) and less expensive (Viessmann costed me +50%) and they never fail when I turn them on after a few weeks away in winter (on the Alps).

Update: they are faster to reply here, only a couple of hours after my comment (just asking to contact the customer service). Anyhow I have already contacted the customer service, after two days they don't even reply. Maybe you want to contact your customer service and check why they don't reply.

I wrote to Viessmann on Monday. Today is Friday, the assistance did not even reply to my email. Stay away from them.

Behind this website are people who are not only very professional but also want to offer solutions tghat work and allow a project to move on. Thanks

I had an issue logging into the Viessmann app which was very quickly resolved by your service representative. I was particularly pleased that we could speak in English as my German is very poor. Overall, I was extremely impressed with the speed and efficiency in resolving my issue.

For the second year in a row my viessmann heating has stopped heating my house. It’s colder inside than out.
The over engineered junk vitodens system external sensor can’t be overridden manually.
To add insult to injury the control app spends more time asking you to upgrade to a paid subscription for expanded features than providing any useful functionality.
The local installer is completely useless and nobody else seems to want to deal with the system!
Do not buy Viessmann overpriced garbage!

The customer care person was extremely helpful, patient and friendly at all times. She was very competent and knowledgeable and thus was able to give me quick and productive help. Step by step we went through the fault finding process and finally managed to solve the issue successfully.
I am very grateful.

All was fine, I'm happy to work with Viessmann company.

Super Support

pro-aktive Information

NEVER SUCH A TRAUMATIC EXPERIENCE
VIESMANN A SHAME WITHOUT END
We installed a viesmann heat pump system in Rome and as soon as we started the heating system it had problems causing an electricity interruption. Our electrician told us that the so called earth safety system was blowing. I would like to point out that the flat as well as all the electrical systems are new, and were totally renovated on February 2022. The technician who came and who installed the system told us he had to contact Baccanari gas srl as they were direct contacts viesmann for technical assistance. Once we called to fix the appointment, it took them 2 weeks just to fix it, giving it to us for October 20th. While we were returning from abroad only for this appointment, they called us the same morning to cancel and postpone the appointment to 26 October. the technicians came on 26th October, after waiting for a few weeks, and told us they had to replace a piece, but that they didn't have it in stock and it should have come from the german company. Obviously winter was starting and we were anxious that everything was done quickly. On December 15th (although they had given us December 20th as the first appointment, bringing it forward on our insistence by a good 5 days), therefore after almost 2 months and in the middle of winter, they came and after having said that they had replaced all the plant datasheets but they said that a gasket remained to be replaced, which they didn't have and had to be ordered. Only 2 months had passed after all. Too bad that little seal left us without hot water. In the meantime I have gone under surgery and will remain in bed for two months, without domestic hot water.We Called back once again today, from December 15th the day of the intervention they said they had ordered this spare part only on December 20th (it's not cold and it's not winter anyway), too bad they told us that it was only of a gasket and not of a piece that would have prevented the use of hot water. We called assistance again explaining the need to have hot water for health reasons and we have not yet been contacted in response. I asked them to find a solution because the situation was ridiculous and I would have testified to this disservice and in response they told me that they certainly didn't have any temporary system to build in place of the nopt working one, so they could not solve the problem. After asking for the interlocutor's name without getting it to my request to have contact with a manager, the young lady said she would ask permission to give it to us and never contacted us again. The only answer we got was that the spare part would arrive shortly. The last time this "short time" lasted almost 2 months. And the result of their service is that we now have heating but no longer water which worked perfectly until then. I point out again that the system is new, the technical support service by the Italian company was poor, but the management of spare parts by viesmann was at least shameful. If I may advise you, do not use foreign companies that don't care about the problems that arise abroad, and use understaffed technical support companies that are unable to manage calls (they have always told us during our telephone calls that they have only few technicians for that product) or to keep spare parts in stock. Being viesmann an expensive product, indeed very expensive I would say and in their opinion of the highest quality, I expected more from both the german company and the technical support. If I can, I'll have a water-heater installed for a few hundred euros and I will continue to count the days that separate me from having a system that costs a few tens of thousands of euros and works. I wonder if viesmann also spends money on R&D and made in Germany components, or if they only spends it on marketing to make nice videos and captivating websites.
In addition to cars (ferrari, lamborghini...) I believe that Italy is capable of making heat pump heating systems of excellent workmanship, let us not be fascinated by the Teutonic name, they can give bad products and services like everyone else, but being far away they don't even have the understanding of the situation. As a final consideration, how does a company like viesmann that has a turn over of 3.4 billion euros choose for assistance in the most populous city of Italy, Rome a company that has a turnover of less than 2 million euros? Wouldn’t it be the case that for the sake of the good name,viesmann chooses to exclusive assistance and stops working with companies that have dozens of brands in assistance and technical support. But maybe customer satisfaction doesn't count for viesmann.

Unauthorized shutdown of the cooling by Viessmann

I paid a very expensive contract to be a premium client of Viessmann. They came to my house and turned off my cooling system without my knowledge or authorization. Since the cooling system stopped working, I started to believe that my heating pump was broken. Afterwards I discovered what Viessmann did. Then now Viessmann is telling me that they cannot turn on again since I have to buy new Viessmann equipment. Since I have a nine month old baby and my house is extremely hot, I would pay it right away to solve this issue. However, Viessmann seems to be quite unorganized and they said that it will take months to solve the problem that they caused.

I have no words to say how unethical this attitude is. If Viessmann is capable of doing that with babies and with premium clients, they have no limits.

My suggestion: stay away from Viessmann. Look for other options.

PS They also damaged my main thermostat and they want to "solve" it all together.

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For 2,5 years I purchased a Viessmann KWK Anlage from Energy World, a company based in Cologne, Germany. I have had nothing but problems with this system from day one. Unforutnately, the company from which I bought the KWK Anlage has gone bankrupt and Viessmann is saying that the heating system is (1) no longer under guarantee and (2) because they didn't install the system, they are not responsible for it. Even though it is a Viessmann product. NO HELP AT ALL!!!!

We acquired a heat pump Vitocal 200 one year ago. At first it was working correctly until the winter arrived. With colder temperatures (< 4 ºC), some days the pump stopped working and went into a faulty status. The local technical service of Viessmann (Astyco in Santiago de Compostela, Spain) came several times to fix the issue with no success. They changed a sensor, then a board, then they tried to blame the electrical installation, but the problems were never fixed. The warmer seasons of the year hid the problem, and no real solution was given in the end.

Now the winter is back and the issues with the heat pump are back and they have become even worse. At the moment, the pump does not work almost any day. Instead of providing a quick solution (changing the whole heat pump, for example), the people in Viessmann Madrid are still trying to use our house as a training school to guess what the issue is with more and more diagnosis sessions. In the meantime, we are still suffering the cold temperatures.

We have Vitosol system installed in our house in Turkey. Mainly this works well but system is dependent on electric power.
When there is no electric power system will not function.
So today our power is suspended from 09.00 - 16.00. It is a very sunny day 18 c but we have no hot water.
Why with such an expensive system doesn't Viessmann include a small rechargeable battery pack which can provide sufficient power to run solar pump and system control?
This is a bad design specification and a major oversight.