The crazy water dispenser. I want to make sure I have your answer correct. I turn off the ice

Question

I want to make sure I have your answer correct. I turn off the ice maker. That will make the water stop coming out of the water dispenser? or will it still come out and that is how I know the diode thing is broke? And is this diode thing easy to fix or do I need to find a repair person (which is not easy where I live)?