Three schemes that never mix
An Asko dishwasher can report a fault in one of three unrelated ways, and reading the wrong table sends a repair down the wrong path. Older units flash an LED blink code, current units print an F-code on the display, and the Outdoor series uses its own colon-format scheme whose meanings clash with the mainstream generation.
Legacy blink codes (DW20.1 platform)
On the older board, F1 flags a slow temperature rise while heating, F3 a thermistor fault, F4 a water-intake failure, F5 an inlet-valve leak, F7 a pump-out failure, F8 a blocked filter, and F9 a circulation fault, while FA points at the turbidity sensor and FB at the spray-arm divider.
Current display codes
Newer machines show F10 for overfilling, F11 for a water-outlet fault, F12 for a water-inlet fault, F40 for valve leakage, F41 for a heater fault, F45 for a diverter fault, F52 for a water-level fault, F54 for a second overfill stage, F56 for a circulation-pump fault, F67 for a second inlet fault, and F68 for a drain-pump fault. The Outdoor series prints the same numbers in a colon layout such as F:10, but its meanings differ, so we confirm the model first.
What to check, and when to call
For an overfill or drain warning, look at the inlet hose, the tap, and the filter before anything else; a heater or diverter code, by contrast, is internal. A reading that returns after a reset needs an experienced technician carrying the correct genuine OEM or trusted-supplier part. See the dishwasher error codes page or the error-codes library, then book dishwasher repair.