Bosch gas range: Bake and Broil functions not working

Oven/Range/Cooktop Repair
1

I have a Bosch gas range. Please see issues below. I initially thought it was the igniter but neither the Broil igniter up top nor the Bake igniter below get hot, so wondering if it could be something else. The stovetop burners work fine. Any help would be appreciated.

Brand: Bosch
Model Number: HGI8054UC /03
Main Symptom: Bake and Broil functions not working. It says “pre-heating” but never kicks in
What happens & when: I push the “bake” or “broil” button, enter temp, and it says pre-heating, but nothing happens. All of the stovetop burners works fine and there is power to the appliance (the display is electric).

Error Code (if any): no error code
Parts or tests already tried: the broil igniter does not get hot; i didn’t pull off the pan to check the bake igniter, but I suspect it does not, either.
Photos / video link:

2

This is likely a relay control failure. If you access the back of the range with the gas supply turned off, and test the bake or the broil igniter for 120 Volts AC from wire to the metal frame with a multimeter, is voltage present during a cooking cycle respective to the igniter being tested?

3

Thank you for the reply. Multimeter arriving tomorrow. Will test and post results. Am I understanding your comments correctly that I should test while a bake or broil cycle is going?

4

Correct, voltage testing would be the most accurate identifier.