Steam Bath
When the machine steams (during the main wash on Full Steam, the prewash and the main wash on Heavy Steam, and during the prewash, main wash, and final rinse on Sani Steam) the pump stops and the heating element (which they call the Steam Generator) turns on. The element is mounted rather high in the bottom of the tub (so that it is only partially submerged in the water) and is encased with an aluminum heat exchanger. The tub fills with steam (a LOT of steam--you can see it puff out the fill flume) and the machine continues this way until a thermostat mounted to the inner door panel trips. (I'm not sure what the actual temps are for the wash and sani t-stats.) It's effective, but it does make for lonnnngg cycle times.
I'm disappointed to hear about the plated steel tank. Mine has some rust spots (and the seams are rusty looking as well) and I had chalked it up to the little surface rusting that even a good sink sometimes gets if not cared for properly. So it's apparently something more sinister than that, which sort of makes me rethink this whole operation. We're about to start a kitchen renovation and I thought this handsome machine might get a place in it, but now I'm not so sure. Well, we'll see.
Kenmore1978: Those are good ideas for dealing with the upper rack, but I've tried tilting my cookie sheets every which way and they hit the upper washarm no matter what. I guess the answer would be to hand wash them, but so far I've tended to be of the rather severe mindset of, "If it can't go in the dishwasher, it can't come in my house."
T.