"Andy Pandy" wrote in message
...


Well

New Fan installed and boiler fires up fine. Brilliant.

Only prob now is that when I connect the pump to the PCB the Consumer
unit trips still !

Could the fan becoming stiff (in the first instance a couple of days
ago) and so not working have somehow put load on the pump or PCB as it
was struggling to rotate.

I will test Pump tomorrow with a flex to socket on the ring!!

You would be better testing the disconnected pump with a Megger. Pumps are
notorious for suffering leakage into the terminal box or even worse into the
windings.
Worth keeping in mind that its often possible to change just the "top" of
the pump without removing the volute casing.
IIRC there is a "universal" replacement pump top produced by Ideal