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  1. muzungu

    Vaillant VCW 242 e secondary heat exchanger

    Hi all, My VCW 242 hot water has been getting gradually more intermittent over the last couple of years and is now irritating! Central heating is fine. Boiler comes on fine when hot water tap opened and then cuts out for about a minute then comes back on so the temp fluctuates at the tap. It...
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