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    Viessmann 100 WB1B 35kW error code fd

    Just fd
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    Viessmann 100 WB1B 35kW error code fd

    Duplicate post deleted
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    Viessmann 100 WB1B 35kW error code fd

    Hi Ian. Thanks for your interest. Maybe my post wasn't as clear as it could have been. I wrote that post following two (probably three) instances of high voltage causing the fd error over a 5 year period. On the first occasion in 2014 a Viessmann engineer visited twice and said he could see...
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    Viessmann 100 WB1B 35kW error code fd

    Hi In case it helps anyone else, I just wanted to post about an unusual issue I had with error code fd showing on my Viessmann Vitodens 100 WB1B 35kW system boiler. After much head scratching it turned out the problem was that our mains voltage was too high (257V at the time) and the boiler...
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    Viessmann 100 WB1B 35kW error code fd

    Hi In case it helps anyone else, I just wanted to post about an unusual issue I had with error code fd showing on my Viessmann Vitodens 100 WB1B 35kW system boiler. After much head scratching it turned out the problem was that our mains voltage was too high (257V at the time) and the boiler...
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