The failure was in the water level sensor . And since the sensor is electronic, the whole system stopped working. Solved the problem with the breakage of the water sensor - If your sensor does not show water, then just buy the CD4066BM96 four-way CMOS switch in Chip Dip for 100. and take it to a replacement in any workshop where there are straight arms and a soldering iron. For 500 you will change everything.