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    vaillant eco tec plus 831 intermittent hot water problems

    Hi All, Just to say I am a end user not plumber. Have a problem with the hot water. It intermitantly runs tepid. About 3 months ago I had the Diverter valve changed as I had no hot water at all. Since then I have had tepid water intermittently. I happens mostley first thing in the morning. The...
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