Oven not heating over 325 degrees

Oven/Range/Cooktop Repair
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1

Brand: Jenn-Air
Model Number: JDS9860AAB
Main Symptom: Not heating over certain temp
What happens & when: If the oven is set to 325, it will heat up and cook for awhile, but will shut off eventually. If the oven is set higher than 325, the oven will try to heat up but then shut off once it hits 325.

Error Code (if any): None
Parts or tests already tried: None yet
Photos / video link:

2

I believe the main issue is the control board. It has relays that open and close to turn the elements on and off. Unfortunately, it is showing NLA. You might be able to use this site, https://www.corecentricsolutions.com/, they rebuild control boards and is very reasonable.