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  1. C

    Vaillant ecoTEC pro 24 - New PCB, F70, can't enter menu to enter #7 DSN ?

    Hi all I've just had a friend who is GS reg drop over and fit a new PCB for me due to an intermittent fault with the old. He told me it would throw up a fault code as I drove him to Heathrow to catch his flight that he was late for. I don't have a manual and can't seem to find the correct one...
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