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Thanks John, 3PV has been replaced recently, theres no light/power at CH side of programmer until HW is on.

Hi can anyone help with a problem im having controlling my heating and hot water independently, at the moment I can only have CH when HW is on, I have a Mid poss 3PV, surely I can have hot water on only?

Central Heating Programmer Prob! I have a Lifestyle LP522, I can only have the heating on when the HW is switched on, I have a mid poss 3PV surely I can have heating only on? Help required.