https://community.viessmann.de/t5/Gas/Clock-out-of-sync/m-p/289799#M85784 <P><EM>I have a Vitodens 200 installed in my House and it has to now been running very well.</EM></P><P><EM>At the begining of this year i.e. 2022 I noticed a change in the heating te(perature in our home.</EM></P><P><EM>I checked all the settings and nothing has changed. However, the heating seemed to be comming on at the wrong time and the DHW was available at the wrong time.</EM></P><P>&nbsp;</P><P><EM>During the yearly service, the boiler was checked and this fault was not visible.</EM></P><P>&nbsp;</P><P><EM>Today as I sat down with a pen and paper and regstered the boiler behaviour, I noticed that everything is happening with a one-hour delay. i.e. the DHW was to come on at 12:30 (hot water for cooking lunch), but instead it turned on one hour earlier. How on earth is this possible? Is this a known problem with a calendar problem i.e. when the date changed from 2021 to 2022?&nbsp;</EM></P><P>&nbsp;</P><P><EM>Has anyone experienced this problem or is just me?</EM></P> Mon, 12 Dec 2022 10:53:50 GMT RobertS 2022-12-12T10:53:50Z https://community.viessmann.de/t5/Gas/Clock-out-of-sync/m-p/289799#M85784 <P><EM>I have a Vitodens 200 installed in my House and it has to now been running very well.</EM></P><P><EM>At the begining of this year i.e. 2022 I noticed a change in the heating te(perature in our home.</EM></P><P><EM>I checked all the settings and nothing has changed. However, the heating seemed to be comming on at the wrong time and the DHW was available at the wrong time.</EM></P><P>&nbsp;</P><P><EM>During the yearly service, the boiler was checked and this fault was not visible.</EM></P><P>&nbsp;</P><P><EM>Today as I sat down with a pen and paper and regstered the boiler behaviour, I noticed that everything is happening with a one-hour delay. i.e. the DHW was to come on at 12:30 (hot water for cooking lunch), but instead it turned on one hour earlier. How on earth is this possible? Is this a known problem with a calendar problem i.e. when the date changed from 2021 to 2022?&nbsp;</EM></P><P>&nbsp;</P><P><EM>Has anyone experienced this problem or is just me?</EM></P> Mon, 12 Dec 2022 10:53:50 GMT https://community.viessmann.de/t5/Gas/Clock-out-of-sync/m-p/289799#M85784 RobertS 2022-12-12T10:53:50Z https://community.viessmann.de/t5/Gas/Clock-out-of-sync/m-p/299369#M87941 <P>Following as I have the same problem <span class="lia-unicode-emoji" title=":enttäuschtes_Gesicht:">😞</span></P> Mon, 09 Jan 2023 12:05:33 GMT https://community.viessmann.de/t5/Gas/Clock-out-of-sync/m-p/299369#M87941 rowlee0 2023-01-09T12:05:33Z