Rival deep fryer not heating (by 3 users)

I have a Rival Fryer Model CF250. Was working great for weeks, then after doing a few rounds of wings it quit. All lights were off and no heat.

I took the entire fryer apart and began testing connections for resistance, voltage, etc. They are very basic machines. It appears to me that my failure has to do with a diode, this particular diode sits protected by plastic and held by a srping mechanism, I assume it is the temperature sensor.

I assume that the completed circuit relies on this sensor so it being bad has made power quit.