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bigal66
hi,my mother has an oil fired heating system,the problem is 1 of the motorised valves,when she calls for hot water the valve opens and the pump starts ,when she switches off the hot water and calls for the central heating the other valve open but the pump stays off,no heating ,so even though the valve opens for the heating its as if it is not sending the command to the pump,do you think the valve needs replacing, i have checked the wiring at the control box and all is secure ,thanks for any advice ,bigal