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  1. MrStark

    Valiant eco tech 630 no hot water

    Hi, first post. Engineer is booked for 5th of June. But just would like some clues. I’ve read the other posts and the zone valve is likely culprit still. ch fine Zone valve for hw doesn’t move I do hear a click in the nest heat sync when I choose hot water. If I open and lock the zone...
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