Oven won't get to operating temps.

This is a double electric oven with a convection top. The broiler works fine. The baking part will not heat up. You can set the temperature to 375 and it will go into "preheat", but never attain 375. Gets into the 200-250 range.
No codes show up on the display.
Bottom oven works as it should in both bake and broil.
Any guidance would be appreciated.
Thanks.
Ron