In an earlier contribution to this discussion,
Andy Pandy wrote:


One point though,, my bathroom rad is still warm (only warm and not at
all the full normal temp). I think I have always had this with the
bathroom rad though.

Are you saying that the bathroom rad is warm when the CH is off, and all
other rads are cold?

Does the bathroom rad get warm in the summer when the HW is on but the CH is
off? If so, it is possible that that it is connected into the HW circuit
rather than the CH circuit (or even possibily connected *before * the
mid-position valve so that it gets hot to warm the towels whenever the
boiler the running - whether for HW or CH or both. If you have had the HW
on after you turned the CH off and if this rad got warm as a result, this
could be a possible explanation.

--
Cheers,
Set Square
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