Re: Hotpoint dishwasher FDM550 fault codes
The salt & Rinse Aid lights should be flashing for any error code, the other lights give the correct code which in your case is supposed to be blocked filters or pressure switch fault.
Mesh plate, filter or microfilter, pressure switch,
circulation pump can all cause this problem although in most cases on Indesit machines it is the main circulation motor that fails. 🙁
Full list of codes is HERE Different model number but codes are the same.