Replaced the thermal fuse, heater element and control board as a pair a few days ago. Everything went in fine and the dishwasher worked fine for half a dozen or so cycles. Today it was in a cycle where I had set High-Temp Scrub and Sani Rinse and the fuse blew. No apparent indications of anything wrong on the control board.
The previous failure mode was a blown K2 relay and control board damage apparently related to a heater element issue. The thermal fuse had blown also. I replaced all three.
I watched the video about replacing the new thermal fuse and noted two things.
1. I did not clip the old connectors and use the new harness when replacing the new fuse as they seemed to fit just fine. If that is important, I will use when I replace the new fuse but I'd sure like to know why/how that makes any difference and if that explains why mine blew.
2. I notice on the video that the control board in the video has a cover shield. My dishwasher does not and the open control board faces the back of the metal door panel. Made me wonder if the heat from the inside of the dishwasher during the sanitary wash/rinse made the inside of the door panel too hot and ultimately caused the fuse to blow.
Any thoughts why the fuse blew and what I should do about it. What temperature is the fuse set to act?