Model Number: BFEF386AS2
Brand: Frigidaire
Age: 6-10 years

It seems that everything else on the oven works - all stove top elements, etc. But on Convection Mode - the Fan runs but there is no heat. And the top and bottom element don't heat.
However, if you run bake mode (which has no fan) the bottom element heats up properly. If you run broil mode, the top element heats.

So is this a controler issue? Something else? How can I further diagnose?