I have a strange problem with our Halstead Ace High combi in that every now and then the CH switches itself on. Even if the dial is set to just DHW hot water is being continually being sent to the rad.s which get very hot. While this is happening the hot water LED (but not the CH LED) on the boiler control panel is lit up, even though no hot water is being drawn. By turning the dial off and back on it seems to sort itself out, but sometimes this has to be repeated a couple of times. When it's heating up the CH loop in this way there seems to be no temperature regulation of the CH system as the rad.s just get hotter and hotter. When it's behaving itself the temperature of the CH system is being correctly adjusted by the dial setting on the control panel.
pluber had a look and said poss diverer valve but not 100% sure, said some water around a switch with a pin in it ??
please help
pluber had a look and said poss diverer valve but not 100% sure, said some water around a switch with a pin in it ??
please help
