Samsung WF70F5E0W2W Error OE, Fills with water and drains in emergency mode

Hello
It fills the tank halfway with water, the overflow emergency mode is activated with a sound signal and the water is drained. Error OE.

If I turn on any washing mode, it fills with water (I watch the frequency of the pressure switch), I wait until 22 Hz and stop (pause), so that it does not fill up anymore and does not enter emergency mode. I switch to spin mode (12 minutes). The water drains quickly. The frequency rises as in an empty tank (25.6 Hz), the water in the tank has run out, but the pumping motor pumps and the time is set at 11 minutes. I do not wait longer, so as not to damage the drain motors. All these actions - the drum never spun.

Samsung WF70F5E0W2W, pressure switch ST-545 . DC96- 01703G.

( 1=S+ : 2=GND : 3=S- ) Pinout on the pressure switch

1-2 contact 25.6 HZ (Empty tank) , +2.6V ; 2-3 contakt +2.6V

I changed it to a new pressure switch, everything is the same. Both work the same way.

I checked the pressure switch for frequency. Frequency 25.60 Hz (empty tank), after filling the tank at a frequency of 20 Hz - emergency mode is triggered. It turns out that as the pressure in the tank increases, the frequency decreases. As far as I understand, at a frequency of about 23 Hz, the water supply should turn off and the washing mode should turn on. This does not happen for me.

I checked the voltage entering the pressure switch, +2.6 volts. As I understand it, is this low or is this OK for my model?

All have +3.3- +5 volts on similar ones.

- I removed the black tube from the pressure switch and checked it in water under pressure for microcracks. Everything is fine.
- I checked the drain pumps, everything is fine.
- I removed the motor, checked the brushes, everything is OK. I connected the motor directly to electricity, it turns. I also checked the tacho dacha.

Advise me in which direction to look for the problem?






AI: Have you inspected the control board (PCB) for any visible damage, corrosion, or faulty relays that might affect the signals to the pressure switch or motor?
NO
AI: Apart from the OE error, do you see any other error codes, unusual indicator lights, sounds, or smells during operation that could help identify the problem?
NO

Water is supplied continually because the water
level detection does not work.
- Because the drain hose is clogged and there
is an injection error (at a narrow section), the
water level detection does not work and water is
supplied continually.
- Water is supplied continually because of freezing
or because there is foreign material in the water
supply valve.
- This error may occur when the water level sensor
is degraded.

>>21687521

The drain hose was checked from the pump. I placed the drain hose into a container to verify the discharge flow. The drainage is instantaneous.

The water inlet solenoid valve was tested. The water fills quickly, and when I unplug the power, the valve immediately shuts off the water.

The water level sensor (pressure switch) was replaced with a new one, but there was no change. I also measured the sensor parameters (frequency and voltage), and the values are identical to those of my old sensor