Here are parts
Parts for Frigidaire CFEF372BC3 Range - AppliancePartsPros.com
They are for a BC3 unit. It was the closest match to the given model number.
Best to call the parts people as they have more info than what comes up on this site.
See the attachment for a wiring diagram.
Sounds like the control board is toast.
I am assuming that the unit never comes ready and stays in preheat and that everything looks normal.
Unfortunately it looks like the control board is no longer available.
I would check the wiring to/from the elements from the control board just to be sure they are OK. Also the L1 and L2 wires that supply power to the control board.