Recently we have been getting random fault codes on our 17 year old magic chef gas oven. The codes started with F5 which would pop up after the oven had been on some time after which the oven would just shut off. After this the code F4 would just come on randomly, either in cool down or anytime. I suspected either a bad logic board or a bad temperature sensor so tested the sensor first. The sensor reads about 1119 ohms and this increases as expected when temperature is applied so in mine mind rules out the sensor. Are we talking about a logic board here? Any opinions would be appreciated.

Thanks....Jim