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pressure was up in the red then customer turned boiler off.
pressures was up in the red, then customer turned boiler off.
They advised boiler was noisy, like a rumbling there is a small area of soot on the back of the pcb cover on the outside next to the pump, there is about 25mm clearance. maybe the pump got to hot? I'm guessing from your answer before the pump has worn out, got to hot and sized. hence the black soot and no demand . from other googles today the pump has a silver sicker on it so it is the original not the new type black one.
i didn't have time yesterday as had kids with me,only popped into see customer as i was passing. was going to collect a new pump and pop back to them tomorrow afternoon.
once centre screw taken off i take it if sized then water will come out.
pump was not running, boiler was totally dead apart from display which read 0 temp and status s.o
does the water differ if running ok or sized?
s= status 0 = no demand
no change with dhw its the same as heating, just no demand nothing happens i ran hot tap mins but nothing changes on display sill s.0 no demand