Water would not go into the dishwasher

According to PartSelect and other info I found, usually this problem can be solved by replacing the water inlet valve. I did this, but the problem remained. Next I tried replacing the float assembly and float switch. I couldn't find videos online showing this for my old-style float assembly so I tried getting expert help online. A repair person answered my questions--I had to remove the nut from the end of the float, insert the float, and re-attach the nut by going underneath the tub--and I replaced the float assembly. The float switch was actually inside a plastic box that was attached to the frame. It was hard to reach the screw that held this plastic box in place. But I got it unscrewed, opened the box, detached the wires, replaced the switch, attached the wires, and screwed the box back in place. Now my dishwasher works!