Hello, I have a Vitocal 300g installation for house heating, with a water reservoir buffer, and then connected to floor heating circuit. For the last 10 years it has worked without any issues, and without any changes in configuration or tinkering. This winter, it doesn't seem the heating work anymore. The system does not show any error or message. The heating pump starts for 10-15 minutes and then stops for 5-6 hours. The temperature in the sensors seem correct (+/- 1 degree C) compared to external thermometer test. I am attaching the display of the installation and the diagnostic screens. If anyone can help with any suggestions of how to debug this situation or what settings to change, I would be greatly appreciative. I have reached out to the local Viessmann authorized partner and they didn't even bother coming on-site, just said the 300g system is not supported anymore and quoted me a new installation for 20.000 EUR saying that is the only solution. Best regards, Bogdan
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