Samsung DW50H4050BB shows error 4E ⇐ Samsung

[Caves]

Good day everyone.
The following problem happened.. The dishwasher DW50H4050BB beeped while washing dishes, drained the water and stopped. Having opened the door, I saw the error NOT on the display. When you turn it on again, the machine tries to start working, buzzes for a while, but does not draw water and displays error 4E. Please tell me the probable reasons and how to check them..
As I understand it, maybe the aqua-stop has worked somewhere.. The hose(?) costs some crazy money, almost half the cost of the machine.. *x) But is he the reason?...

[Energy class]

Please tell me how you solved the problem?

[andrewa4]

Regarding the error

4E is a malfunction associated with filling the machine with water; if it appears at the moment of water supply, then the aquastop should work. You need to start with the inlet hose, or rather with the inlet valve, if everything is in order with it, then there is a possibility that the reed switch, which is located in the side tank, has failed (if you look at the machine from the front and unscrew the left wall), this sensor is on photo, sometimes you just need to move it, I made a hole to make it easier to adjust. The rotor itself, in which the magnets are located, may also freeze.