this is a new fault
the permanant feed is only at the boiler to keep the pump & fan going till the water temp goes down and shoudn't bring on the gas supply
if i take the face of the programmer off which removes the switched supply
the boiler & pump still comes on indicating that its being feed via the permanant supply .
thanks
i,ve noticed that my bathroom rad is hot all the time this is acting as a by-pass valve for my s plan system have checked programmer and both port valves and they seem ok could it be my boiler stat.
thanks wiskerman...