At one time, there wre two models of Sears agitator versions. One had the window, the other one didn't. The one with the window had an annual consumption rating of 420 KWH and the one without the winodw was 500 kwh. I made the assumption the one with the higher consumption per year had a true hot wash. I believe the "invizle" agitator models have a true hot fill, but then again, it doesn't use that much water. There is a possibility one can override this by simply turning off the cold tap, however, with today's electronics, that may cause the machine to shut down from filling. My 1986 LK would add some cool water if the hot temp was over 140, but I'd just turn off the cold tap if I wanted that not to happen. But that was 20 year old electrnoics too.