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    Heating Sticking On - Electrical or Sticky Valve???

    Hi (and a Happy New Year to one and all), I'm hoping somebody can give us some advice to try and resolve our issue once and for all. We have a Potterton Suprima 80 boiler. That has been problematic in the past and has a new PCB twice. The hot water cylinder also has had a new PCB. These...
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