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  1. M

    Vaillant Ecotech Plus No Heating when hot water is on

    I have this Vaillant in a pressurised system and have the VRC 470f controller. Heating works perfectly on the timer as does the hot water. However, I cannot have hot water and central heating on at the same time. Normally not a problem as it is rare for us to need both on. However, at the moment...
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