Fridgidaire Oven Problems

I have a recent problem, we were cooking dinner and had an F3 code come up on the display. I read a few sites on the internet and it said to test the oven sensor. It Ohm’d out at 1100, which is what I read it is suppose to be, any ideas what else might be the problem? It seems to work off and on, but usually not cooking for to long without beeping and displaying that code.