My dishwasher keeps blowing the Thermal cutoff fuse after the prewash just after the soap is dispensed, I put a new fuse in it does a prewash then drains , them fills again just after the soap is dispensed and its supose to wash again it blows the fuse. Can't be the drain pump it rinse cycles fine, pre washes fine. Could it be the wax motor it is hot to the touch?? or the electronic board??