I’ve got an Indesit DSFE 1B10 S UK with a similar problem
It is 10 months old and over a period of time it has been taking longer to start. Now it won’t start at all. After a few minutes the on/off switch light repeatedly blinks on/off and the stop/start light repeatedly blinks 6 times.
I’m in a queue for an engineer to come out but if I knew what the blinking lights mean it might be an easy fix. Can’t find any references anywhere online or on the Indesit website.
Water pressure OK, no blocks in the drain, no leaks, door shuts ok, salt added ok.
Update:
The engineer came out and diagnosed the code as a water pressure issue. The water supply was ok, so new pump and waste valves fitted. Still didn’t start. Took the power module out and obvious burn marks on the board. Replaced the board and it now works.
Update 2:
2 months later and the problem has returned.