I have a GE Dishwasher Model GDF620HGJ0BB. The dishes haven't been coming clean for some time... a greasy film on everything. I just noticed that the water doesn't get hot... checked it mid cycle and the water was room temperature. It's connected to the hot water line and when it initially fills, it's the temperature of the tap hot water, but then it cools during the cycle and never heats up. I've checked a couple of things, but I'm not sure where to go from here: 1 I measured the resistance on the heating element and it was 16 ohms, which I've read is typical. 2 Mine has a float valve in the center of the dishwasher. I removed it and it was completely clogged with grease. I don't know if this is a cause of the problem or just a result of not having had hot water. I cleaned it out with hot water and and air compressor. Now when I turn it upside down I can hear something slide. I connected a continuity tester to two of the pins on the bottom. In one direction there was no continuity, but if I flipped the float upside down there was or vice versa, don't remember. Something in there is working, but there are 7 different pins, so I don't know if it is a combination switch and thermostat and several other things? the part is WD21X10519 When it runs and is full of water, the water comes up just short of the heating element. Is that normal? Is it supposed to be submerged? (EDIT: I've read from other sources that it's supposed to be just below the heating element, so this sounds normal) Any idea of what I should test before guessing and replacing a part? Thanks!

Dishwashers - GE