Does anyone know what this code (groups of 4 flashes) means? I am seeing it almost every wash, even though in general the dishes are clean. I get the impression that it happens at some point late in the wash.
F4 is associated witha drainae fault so check:
Filters are clean
drain hose is not rescricted,remove from fitting (if connected to sink drain) and check for fat etc blocking pipes
Drain pump may be faulty/worn
Could also be a control board fault.