I just finished reading the "castile 100% dead" thread. It's almost the exact same thing for me! At first the stove would not feed. Found a bad vac switch (the old square one) replaced it with the new type. Turned it on and it took right off. About 3 hours after the repair, heard a loud click and the stove shut down. Checked the feed tube snap disk . Not tripped, fuse was blown. Replaced fuse still no lights on box. Bought a new box set it in, stove took off burning nice! About 3 hours later heard another loud click and stove shut down again. This time the fuse did not blow, but I have no lights on the box. Checked the snap disk again, was not tripped. Checked the wiring nothing appears to be shorted or burned. Called the dealer, he said maybe a bad box? The metal heat sink was very hot to the touch when it shut down. Now what?