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Recent content by SidDIY

  1. S

    Vaillant 428 ecotec plus microfiring

    Just checked and radiator symbol is flashing when it microfires.
  2. S

    Vaillant 428 ecotec plus microfiring

    Good point actually, I'd made an assumption it had frost protection.
  3. S

    Vaillant 428 ecotec plus microfiring

    Is there any way I can check for this? Having done some research I was thinking the PCB has failed making it think it's colder than it is so frost protection keeps kicking in.
  4. S

    Vaillant 428 ecotec plus microfiring

    Got a Vaillant 428 ecotec plus vented condenser boiler. It's coming upto 10 years old and a few months back my other half decided to play around with the controls. She said she only adjusted the flow temperature to the radiators. I've noticed recently (though could be completely unrelated) that...
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