I had the same problem on my Samsung Ecobubble WF70 model. I followed all the tips I found on the internet concerning pressureswitches, hoses, cleaning with vinegar and so on. But in the end I found out that the pumpfilter was clogged with two , so called, color catcher cloths.[br]
So I cleaned the filter well and the problem was solved.
Note: I “forbid” my wife to ude them anymore in the future. ;-)[br]
have a nice day.
Best regards from the Netherlands!