Upon arrival to the location, I met with homeowner who showed me inside. She took me to the kitchen, where she explained she has a leak coming from dishwasher but doesn’t understand from where. The dish washer, which is about 20 years old according to homeowner, currently was holding some water when I got there. She stated a couple days ago, she ran the dishwasher and the water wasn’t draining properly, and it overfilled in the dishwasher and spilled onto the floor. Moreover, she had the valve to the dishwasher off. I checked to see if garbage disposal and other drain was draining fine, which they are. I ask for her to run the dishwasher with the sitting water, and it drained more than half but some of it stood behind in the dishwasher. She also states if she leaves the sitting water that’s in the dishwasher, it gradually increases by itself and that’s her concern. We tried running water to the dishwasher to see if the supply valve was holding, and it was, so it’s not a water supply is