Advantium 120 Keeps Blowing Hood TCO

So I have had my Advantium 120 for over 10 years, and it has been a trooper through years of hard use. About 6 months ago, the upper TCO (GE Part# WB21X10046) blew. I figured no big deal and replaced it after locating the fault of the loss of power. Fast forward 6 months on, the TCO I replaced just blew again. Any ideas why this happened so fast, again? I have a new one coming in today (even though I put the old one in the freezer and "reset" it), but I am a little worried about there may be something else to check out before I put the oven back together. Any ideas?

Thanks