The switch that is on the oven for the fan - Jenn-Air JED8430 Electric Cooktop

If it is the fan under a ceramic flat top, no, because its purpose is to keep the control boards cool.

If it is the oven fan, yes no problem.

Why not go to manufacturer web site for some instructions or a manual for the unit. Make sense?

Your owner's manual should show how. No manual, try manualslib.com
My old sears microwave light bulb is in the upper front left hand with bulb top up and socket down but behind a screen. There are screws to remove the upper fan apparatus, which appears to make the side available to extract the bulb. Probably a very special bulb, so I would get one before going to that trouble. It might also be the switch that is bad rather than the bulb. That probably requires removing the outer surrounding cover.

Hello friend, thank you for your inquiry!

I understand that your fan is not turning off and the element reads "HE" on your Frigidaire range. It sounds like you could be having an issue within your control panel or wiring harness. It may not be communicating properly to your fan or element that it is shutting down. I would recommend having a technician come out to properly diagnose and repair your appliance. -Matt

What does a wall oven fan have to do with refrigerators?

There should be a switch in the door that is pressed in when you close the door. Check the switch by pressing it yourself. If it still doesn't work, replace the switch.

Some have a magnet that operates the switch.

Hopefully it is just the switch and not the fan. Either way you probably need to just have it repaired unless you are comfortable with electronics and wiring. Visits my site www.60cubits.com and look at the links on the right. Repair clinic has parts and repair manuals for a lot of appliances - the manuals are free online

You could try reseting the clock to the manual position.
If in Automatic the oven won't turn on until set time.

Coulds be a relay see if you got elec to fan Dont fool with it if u not a electrician 220 volts will kill you