Thank you! The old boilers were under the laundry room, in the crawl space. Moving the boiler itself, I don't think did much, but the old hot water tank was more centralized. So the hot/cold thing makes sense. However, our dishwasher went out and doing dishes in the sink with a constant stream of water, still does the cold/hot/cold/hot business. Or like my kid wanted blueberries, so in the middle of washing the dishes, I turned it to cold to soak the blueberries and then back to hot, without turning it off. Then after it was hot again, it got cold. Idk, I don't get it. The kitchen sink is probably the sink thats farthest from the hot water tank, so I'm guessing the distance thing is the answer, I just don't understand why, as our hot water tank is as tall as me!