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    Veissmann Vitodens 100 WB1A - F2 fault

    Evening all, Hoping someone might have an idea. I have a WB1A (System boiler, 4 pipe, CH supply and return and HW tank supply and return) which recently developed an F2 fault. Boiler kicks in, heats up rapidly, then cuts out due to overtemp and F2 fault. Originally thought it was a pump fault...
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    Vitodens 100-W control problem

    Evening all, I have a Vitodens 100-w (WB1a I think) the 4 pipe setup which is controlled by a Honeywell controller, one room thermostat and 1 cylinder thermostat. The problem I have is that the boiler is not recognising the second demand placed on it. i.e. If I start the DHW at 05:00...
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    Bleeding radiators

    Hiya all, I have a weird problem with my radiators. They are producing a lot of Hydrogen (but not surprised at this as we are removing radiators, cleaning and replacing due to decorating the house), but when i bleed a radiator (usually the first one I bleed) the radiator drains fully of...
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