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Boiler running 24/7 - heating programme panel issue?

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  • 19-09-2020 1:05pm
    #1
    Diy.2020
    Registered Users Posts: 4 ✭


    Hello I have a grant vortex condenser boiler, connected to radiators (up, down) and hot water cylinder and a eph t37 heating control panel for the 3 zones.

    At the moment the heating control panel is turned to off for all zones, but the boiler is still firing up and the hot water cylinder is constantly hot, as is the heated towel rail in bathroom.

    I’m trying to figure out where the issue is? Boiler was serviced and is fine including boiler thermostat. So options are an issue with the timer panel? Or an issue with the cylinder thermostat? Or something else entirely?

    Thoughts would be welcome as new to this and not sure which bit to try fix first.


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    #2
    Wearb
    Moderators, Home & Garden Moderators Posts: 6,231 Mod ✭✭✭✭Wearb


    Most likely a stuck motorized valve.

    Please follow site and charter rules. "Resistance is futile"



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    #3
    Diy.2020
    Registered Users Posts: 4 ✭Diy.2020


    Wearb wrote: »
    Most likely a stuck motorized valve.

    Thanks very much will have a look and hope to get sorted thanks


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    #4
    Dtp1979
    Registered Users Posts: 12,736 ✭✭✭✭Dtp1979


    Diy.2020 wrote: »
    Thanks very much will have a look and hope to get sorted thanks

    Or the service guy turned on the service switch on the boiler and forgot to turn it off


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    #5
    Wearb
    Moderators, Home & Garden Moderators Posts: 6,231 Mod ✭✭✭✭Wearb


    Dtp1979 wrote: »
    Or the service guy turned on the service switch on the boiler and forgot to turn it off


    If that was the case, should the cylinder be getting hot?

    Please follow site and charter rules. "Resistance is futile"



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    #6
    jimf
    Registered Users Posts: 3,952 ✭✭✭jimf


    if not a motorised vale and you have an outdoor boiler possibly but not very likely a faulty frost stat


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    #7
    Wearb
    Moderators, Home & Garden Moderators Posts: 6,231 Mod ✭✭✭✭Wearb


    jimf wrote: »
    if not a motorised vale and you have an outdoor boiler possibly but not very likely a faulty frost stat

    Again the same question as above. Will the call from frost stat heat cylinder?

    Please follow site and charter rules. "Resistance is futile"



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    #8
    jimf
    Registered Users Posts: 3,952 ✭✭✭jimf


    Wearb wrote: »
    Again the same question as above. Will the call from frost stat heat cylinder?


    you would imagine it shouldn't but wiring issues have cropped up here before

    with the one rad heating it sounds like a heat dump or maybe a bypass

    but with the cylinder getting hot all the time it does sound like a sticking micro switch on that motorised valve


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    #9
    Wearb
    Moderators, Home & Garden Moderators Posts: 6,231 Mod ✭✭✭✭Wearb


    jimf wrote: »
    you would imagine it shouldn't but wiring issues have cropped up here before

    with the one rad heating it sounds like a heat dump or maybe a bypass
    BAD WIRING?
    Never! <Grin>.

    Please follow site and charter rules. "Resistance is futile"



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    #10
    jimf
    Registered Users Posts: 3,952 ✭✭✭jimf


    Wearb wrote: »
    BAD WIRING?
    Never! <Grin>.

    :pac::pac::pac::pac::pac::pac::pac::pac::pac::pac::pac::pac::pac::pac:


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    #11
    Dtp1979
    Registered Users Posts: 12,736 ✭✭✭✭Dtp1979


    Chances are it’s a MV stuck.


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