Any heat coming through the rads when you have the HW on?

@@ddrepairs Hey brother! Yes, ch warming up a little. I've removed diverter motor & tried moving metal paddle 1 way, then opposite. hw not improving significantly, but it was 26/27°c, then increase a little when I reduced the flow at the stop cock in basement.. (2" deep water underfoot btw!!...Yes I always check pipework is electrically sound👍😉 Forgotten to mention, I replaced the flow turbine holder, which attaches to heat ex & cold a in, because it had a pinhole. I managed to re-use old turbine, which had no damage, when I removed from old holder. Thanks for your contact man, appreciated.

I'm guessing you don't have an answer to this problem😁

Sorry, without being there I don’t know but sounds like your pump is bust or a flow problem through the HE to me

@@ddrepairs No worries man!! I reduced the flow rate on mains stop cock. At least they're getting 55°c on hot water now. Anything else goes on the boiler & I'll replace it. I contacted you, because your boiler was identical apart from kw output, but has exactly the same diverter valve, motor, plastic manifold assembly etc. They produced them for a short while, then reverted back to brass assemblies.....for obvious reasons!!😖 😀