Viessman 111-w temp display when heating water

TriMattRdg · 2024-12-23T08:58:15+0000

When heating water on our combi storage boiler the temp will shoot up to around 90C on boiler then flame display will drop to nothing then this cycle repeats (hot water set to 55C. Boiler heating water OK but is this normal I would have expect to be smoother like when the heating is on rather than all or nothing ? Yesterday I briefly saw an F2 fault but it went away pretty quickly with no intervention needed.

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Viessman 111-w temp display when heating water

TriMattRdg

DIYnot Local

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