My wife self-cleaned the LG oven....in doing so the thermostat was damage. The thermostat is located on the back of the oven. Cost a total of $18 to fix rather than calling a pro. The oven would turn on but not heat over 150 degrees. Shut the power off on the oven (unplug and breaker box) remove sheet metal on top and back of the oven. Remove wires attaching to the thermostat and replace.