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    Boiler not giving out hot water, but heating is working fine.

    I have a Vaillant EcoTec 937 Plus boiler. A few days ago, it had blown it's 3amp fuse overnight, which I replaced. The boiler powered up fine, and happily supplied the house with CH. However, as soon as a hot tap was turned on, it cut off the gas after a short while. I called Vailiant for an...
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