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  1. B

    Pump does not switch on until both heating and hot water are

    I did mention above that I did not know the history of the system. I may have to live with it.
  2. B

    Pump does not switch on until both heating and hot water are

    A bit more info- Pump (primaflow) 3 way valve (cant see a name) Is it possible that the controller is wired incorrectly?
  3. B

    Pump does not switch on until both heating and hot water are

    Thanks for your reply. I dont know the full history but I live in a private house. The boiler is an Alpha CD18R. The controller and timers work fine apart from this oddity.
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    Pump does not switch on until both heating and hot water are

    I have a Danfloss FP715 Si 2 channel programmer. If I switch on central heating only the light comes on but the pump does not come on and the rads stay cold. If I then switch on the water as well, the pump comes on and the rads heat up. I am assuming that I should be able to switch on heating...
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