Re: indesit w101 fault
If the m/c fills to a certain level and the pump kicks in it could be overfilling to the flood protection level on the pressure s/w. Possible duff pressure s/w. BUT you should get a fill timeout error with this condition or an F4.
If the pump is running during the fill period so that it never fills then it might be short circuit pump triac on the board BUT again no timeout error – why?
If it fills to correct level and stops. But then the pump kicks in and m/c resumes filling when water level drops it might be worth getting the module checked out.
Because it is not giving any timeout error code the module sounds suspect anyway IMHO.