https://venmo.com/u/appliancejunk
For anyone else encountering this (it's coming up a lot as the ranges are older now), E84 is >95% of the time a failure of the right inverter board. DG96-00216C in various models of the Samsung ranges NE599, NE597, NE595 etc. You can usually check by testing the fuse on the board. Replacing the fuse alone generally won't work, and you don't want to use the same 25A