The fix works for the dishwasher. That's all can tell.

Yes, what you said is exactly the Whirlpool does. But if one can do the job why not give a try?

Just one simple question, what could be your choice if you know there is simple way to fix your problem at less cost, but the other way from someone declares as the authority for the problem ask you pay at expense cost and buy their product and/or service? Scientifically and technically thinking, not taking this as a personal question.