How to check/test washing machine pressure sensor|| step by step. 

This video shows you how you can check pressure sensor of your washing machine using digital oscilloscope, this task is performed when washing machine has problems with water drainage, pressure sensor is responsible of detecting water level by sending related water level frequencies to the main controller
Water level frequency has to increase or decrease according to water level in a tub, if washing machine is draining water frequency increases to 25.4KHz
and decreases to 23.0KHz when it is full of water, if frequency is not changing means there is a problem with pressure sensor or main controller, air chamber or air hose, physically check air hose if it is not loose and check air chamber if it is nothing stuck in it, thank you all, @felixtechnoaid2044

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