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  1. R

    Worcester 18Ri pump overrun issue

    No just the pump, demand for the boiler has stopped, the green ignition light extinguishes but the pump carries on forever - only if the last call for demand was hot water
  2. R

    Worcester 18Ri pump overrun issue

    Both valves are 2 port, one is Drayton the other Honeywell Thanks Tony - I tried turning down the cylinder stat but the pump carries on running. Only seems to stop if I run the heating for a bit then shut off demand
  3. R

    Worcester 18Ri pump overrun issue

    Hi, I've noticed that the pump overrun on my worcester 18ri does not stop after demand has been reached on the hot water circuit, the pump in the airing cupboard continues indefinitely. If I call for demand on the heating circuit and then turn the room stat down the pump overrun operates for the...
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