Evohome - temperature dropping below the away value

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  • bruce_miranda
    Automated Home Legend
    • Jul 2014
    • 2307

    #16
    This is why I am not a massive fan of the Frost Protection settings in Evohome. By the time a room in the house has reached 5C, pipes under the floor and unheated areas are way lower than that.
    This is why I used to have a HRxx valve in the loft which wasn't connected to a radiator. This would trigger the Frost protection in advance of the rooms.

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    • gpaolo79
      Automated Home Jr Member
      • Nov 2020
      • 19

      #17
      Well, I have arrived a couple of hours ago in a very fresh house. Mystery solved: boiler was blocked with a fault. It´s Worcester Greenstar, code was F7, which is Ionisation detected before burner start. Never had any error in the past year... After a reset it has restarted and it's warming up. I'll see if it does it again, but I was wondering if the new evohome could have something to do with it. Before, the heating was switching on and off relatively few times a day, now I can hear the relay switching on and off the boiler quite often, and in more than one occasion without a clear idea of what is triggering the switch on.
      Did anyone experience any similar issue?

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      • mtmcgavock
        Automated Home Legend
        • Mar 2017
        • 507

        #18
        Originally posted by gpaolo79 View Post
        Well, I have arrived a couple of hours ago in a very fresh house. Mystery solved: boiler was blocked with a fault. It´s Worcester Greenstar, code was F7, which is Ionisation detected before burner start. Never had any error in the past year... After a reset it has restarted and it's warming up. I'll see if it does it again, but I was wondering if the new evohome could have something to do with it. Before, the heating was switching on and off relatively few times a day, now I can hear the relay switching on and off the boiler quite often, and in more than one occasion without a clear idea of what is triggering the switch on.
        Did anyone experience any similar issue?
        Is it a Greenstar CDI? If it is you’ll need some new electrodes fitted by a gas safe engineer and probably a service

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        • gpaolo79
          Automated Home Jr Member
          • Nov 2020
          • 19

          #19
          Originally posted by mtmcgavock View Post
          Is it a Greenstar CDI? If it is you’ll need some new electrodes fitted by a gas safe engineer and probably a service
          I think it's the CDI, yes... Ok I'll try to find someone to do the work.

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