
Mohammad Mahdi Shahabi
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Update: The problem has not been fixed yet. Then, all of a sudden came "maintenance notification with no reason and I had to go through registration again and with the correct data (qr code) it was not working at all. I had to delete all the data until it worked. The emails won't be answered,although they say,"we get back to you as soon as possible. Recently, I'm obliged to register with email, and to my wondering comes the "something went wrong, please try again." Really disappointing
2 people found this review helpful
Viessmann IT Service GmbH
October 29, 2023
Hey Mohammad , the problem has been found and fixed. Let us know if everything works as it should. We will be grateful for your updated rating! #WeCare

A Google user
Hi, I find the app quite useful and informative. As a suggestion for future releases, I would recommend to display at least 14 months in the consumption graph for the "month" view. In the current 13-month view it is never possible to compare last month's consumption with past year's.
3 people found this review helpful
Viessmann IT Service GmbH
March 9, 2020
Dear Alcor, thank you very much for your constructive feedback! We will take this with us for further decision on the development. As of today the app gets the data from the control unit and there is the data just for 12 month available. Do you have any further feedback for us? #WeCare

Fred Llamedos
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worked fine for a while now says "no Internet connection" if I go to main unit it shows as fully connected to the internet with backend connected but app refuses to connect at all. update, supplied Viessmann with all details requested and... no reply, nothing nada. what a complete waste of time you lot are.
2 people found this review helpful
Viessmann IT Service GmbH
August 28, 2026
Hello Fred Llamedos. We apologize for the inconvenience. Please send a description of the issue, screenshots/photos, and the communication module’s serial number to customer-contact+FredLlamedos@viessmann-climatesolutions.com. This will help us assess the situation thoroughly and provide an appropriate resolution.