Thanks again Gene. I have a bit more information to add. It seems that only the bake cycle will not hold temperature. In the convection bake cycle, the temperature control works properly. Do you still suspect the control board and if so, is there a particular component that I could replace rather than the entire board? Any help you can provide in helping me identify the component as you did with the microwave relay would be very much appreciated! Thank you.

Thanks Gene. Don't think the issue is the difference between the set point and the actual temperature as much as the oven not holding the temperature. The problem seems to be intermittent so i think it was just coincidence that when I changed the oven to convection bake is worked fine. I checked the resistance at the temperature sensor at the control panel connection and it tests good at about 1080 ohms. As the oven is now working properly again, could it be the sensor is on the blink? Or the control panel?? Any further suggestions on further troubleshooting to try to pinpoint the problem? Many thanks!!

Thanks Gene. I certainly agree with you about guessing. That can be very frustrating and time consuming, not to mention expensive. Only problem is that the wife does not want to use the oven until I can assure her it is fixed for fear of ruining another dish. Help!!