Vaillant ecoTEC plus 937 Boiler - Leak

Discussion in 'Plumbing and Central Heating' started by OMA2021, 17 Nov 2021.

  1. OMA2021

    OMA2021

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    Hi,
    I have the same boiler and the same issue.
    Which isolation valve do I need to turn off?
    Also what was the issue when you fixed it?
    Many thanks
     
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  3. Agile

    Agile

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    Presumably the cold water inlet isolation valve!

    But you are not meant to add on to an existing old thread.

    You are meant to start your own new one and properly describe your installation.
     
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