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    Boiler only responding to room stats, no hot water - valve failure, or something else?

    Thanks for your help, everyone!
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    Boiler only responding to room stats, no hot water - valve failure, or something else?

    Thanks for the replies so far - here's a pic I happen to have on my phone. I can take more detailed ones when I get home if necessary. You can see the Honeywell valve on top of the horizontal pipe that connects to the front centre of the cylinder. According to the diagram in the front of the...
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    Boiler only responding to room stats, no hot water - valve failure, or something else?

    We have a Worcester 14/19 CBi downstairs with a cylinder upstairs. We've suddenly lost our hot water, but the CH still works fine. Googling around the subject, this immediately sounds like a motorised valve failure. When I adjust one of the room stats upwards, the "demand" light on the boiler...
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