Turned oven on last night to 350 and about 10 minutes later smelled the oven as if it were self cleaning. Went over and looked and it was in the locked position and error message F-3 was on the screen. I ordered a oven temp sensor this morning and just out of curiosity I turned the oven on again to 350 to just see what happened and actually nothing happened. It doesn't even heat up or anything. What could be wrong now. Is it the oven temperature sensor that won't let it heat up or is something else wrong too.