Hi Dave
I have attached the pnc number below. There is a sensor that sits in the sump. I have cleaned around it just incase of a build up of limescale etc.
To add. The machine started faulting by only beeping once and the bottom of the machine was full of water (not drained). Once reset the pump would run and drain and usually run a full cycle ok.
PNC 911 539 205 00
Seriel 90925114
Typ GHE623DA2
Thanks