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Boiler water temp too low

Jeanke330
Jeanke330 ✭
in General Questions & Topics

Hi,

I have a wireless temperature sensor X connected to my Viessman Vitodens 100-W b1kc. In the app, I cannot change the maximum flow temp, either with optimisation on or off. The water temperature remains too low to heat our living space (older house with moderate insulation). I have used the opentherm connection as instructed by the app. Any clues?

Thanks!

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