If your washer works, and then doesn't, and water is building up in the pan under the tub, and no other leaks can be detected: take a flashlight and look at the fill valve in the back left corner. Mine had a super-slow drip due to a leak in the valve that would trip the float switch, but only once every 4 weeks or so. So frustrating! Anyway, after googling the part, I found AppliancePartsPros.com had a video with a swap-out that was super easy, and the part I ordered even showed up the next day (I'm in Illinois). The link for the part in the YouTube comment section was really useful. I sound like they're paying me--they're not. They just saved me a ton of money because, after a year or two of this off-and-on nonsense, I was seriously looking at new dishwashers. Instead, this was a $27 fix, including shipping. Took about 15 minutes. Well done, folks. Seriously easy.