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  1. K

    Vaillant Turbomax 828e CH turning on ignoring the timer

    Hi Well I had a 120 Digital Switch which never came on, and I inherited our boiler about 6 years ago (Turbomax Plus). I replaced it with a 110 mechanical switch, which was bringing the CH on whenever it wanted to. Tappets set to off. So much like this problem but the digital 120 switch...
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