Guess I should read a little closer.
I think we're on the same page now and I think we're narrowing down the issue.
I don't have an analog multimeter, but below (and in the attached pics) are the resistance readings taken on the various heating elements.
Convection = 42.2 ohms
Broil = 14.6 Ohms
Bake = 16.2 Ohms
I forgot to check the oven sensor at room temp, but when the oven was heated up, it was about 1,700 ohms. I'll check on that tomorrow night at room temp.
Two other things I discovered are the following:
When in Bake mode, the Convection Element always has 120v present. I believe the oven toggles between the Bake Element (appx. 50 sec on / 10 sec off) and the Broiler Element (appx. 10 sec on / 50 sec off). I'm working to borrow another meter (I have two) so I can connect a voltmeter to all three simultaneously to confirm that timing and toggling.
The things I found that I believe may be my problems are:
The 4th photo I've attached is what I believe is the Thermal Fuse. It is not letting voltage pass through to the Broil Element that I noticed and the resistance measures in Megohms. When I put the oven in Broil mode, I would get voltage to the input side of that device, but it wasn't allowing it to pass through. Again, I need to do some additional testing to confirm all of this tomorrow night when I am back home, but that seems to be one of my issues. It was getting late and trying to keep track of what mode I was in and what all I tested got to be mind-boggling.
The other seems to possibly be the fan motor. There were a couple of times last night that I had voltage to the motor, but the fan was not turning. I opened the oven door and poked a shish kabob skewer to give one of the blades a nudge and it started running. It doesn't always do this, but did a couple of times. This may be reaching, but could the fan not running have also caused the thermal fuse to blow?
Does this sound like a plausible cause to my problem?
If yes, could you send me a link to those two parts? In the meantime, I will do some additional testing to confirm all of this and also test the oven sensor.
Lastly, yes, I did purchase the circuit board from the link you provided. I figured you folks were kind enough to run a website like this to help people like me out so you deserve the business. So, if we think the Thermal Fuse and Fan Motor are the issues, I'd like to purchase those and return the circuit board.