F3 error , Frigidaire Oven

The fef352cata Frigidaire is setting a f3 error code when I try to bake or broil. the Stove top works fine. when the temp is set to bake or broil. I can here it click. The elements start to heat and after only 30 seconds or so it beeps the F3. I am told the temp sensor probe should read 1100 ohms, I have checked it and it reads 1050 ohms. the wires read continuity all the way thru the plug and to the logic board. Could my temp probe still be bad or is the logic board bad. Should I replace the probe first or will I have to buy a new logic unit? Thanks, Greg