Lower oven not heating up

Oven/Range/Cooktop Repair
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1

Brand:Fridgidaire
Model Number:FGGF304DLF
Main Symptom:Not heating
What happens & when:all lights, convection fan temperature settings seem fine, but no heat

Error Code (if any):none

Parts or tests already tried:
Photos / video link:

2

Are both ovens not heating properly or is it one? If it is just one that is not heating, is it not heating during the bake cycle, the broil cycle, or not heating regardless of cycle?