Wife said temp in both ovens was very uneven. Checked with a probe and found temp off by over 50 degrees both ways.

Tried the standard recalibrate in the user manual, didn't do anything.

When I unplug and replug the power, a code appears briefly above the time. But it is not an "F" code. It reads: 3.0

What does that mean?

Seems unlikely that both sensors would go bad at the same time so I'm trying to dicide if I should replace the temp sensors before going to the very expensive main unit control board.

Thx much.