I have one of these in the work shop with a sticking problem.
It goes through the wash ok fills for rinse then just keeps rinsining it will not empty or go to next rinse.
There are no error codes come up, It will drain and spin and the dryer works fine. There are no blow marks or loose connections anywhere (pcb) or components and the pressure switch chamber is fine.
Sounds like a possible PCB/eeprom fault. you would need the hardware key at the very least to diagnose correctly without error codes and even that may not be enough.
Send it to us (main board only) for a test (£5+vat inc return post). At least you will know if the board is good or bad and of course we can repair it too. Tony 0115 9652118