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the five wires from the valve head.tested at the numbered distribution board blue wire 0v orange wire 240v white wire 240v grey wire 0v

hello ... i seem to be having problems with the three port valve on my central heating system its a honeywell i changed the head motor today because it wasn't switching to ch but still no joy they dont seem to be any power to the motor . but i dont know where the power comes from timer / room...