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Heating Demand from Controller cuts out in normal mode but works in boost mode

  • 25-10-2018 8:23pm
    #1
    HurlyBurly
    Registered Users, Registered Users 2 Posts: 76 ✭✭


    Have a Multizone timer controller that sends demand to the boiler. Fairly straightforward with 3 zones and can be Off / On Constant / Timed . And a boost option that will trigger any of the zones for a set period.


    Lately it seems that in normal mode (i.e. when I select constant or timed) for any of the zones the demand goes on, boiler starts but then after 3 or 4 minutes it just cuts off, seems like the timer/controller resets or something.
    If I stick it in boost mode it will stay running for the prescribed time (up to 90 minutes)


    Given that it works fine in boost mode would I be safe in assuming everything is okay with the boiler and there's something electrical going wrong with the controller ?

    Maybe something causing it to trip out.


    Just wondering if anyone has seen that before.
    And if I likely need an electrician in to check instead of the boiler plumber guy.



    The controller box itself is I believe made by an Irish company who no longer exist, multi-zone heating controls ltd.


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