I have the same problem. I replaced the control board from appl. parts pros. and that didnt fix it. After looking at wiring diagram it appears to be connected to the high limit snsor and the door lock switch. could one of these be the problem

i just received the relay board and will install it in a day or so. another $115. but im am determined to find the problem. as soon as i install it and wait for a few days to see if it works i will keep in touch to try to help you.its funny but it just started working steady for the last 3 days after i ordered the relay board.im almost afraid to put it in.i will let you know if it worked. lenny - Installed new relay board that has the power transformer for control board attached to it,that solved the problem! Its easy to install ,wires have quick release stackons on them. Make sure you turn circuit breaker or fuses off first. My stove is now working great and the control light stays on nice and bright. hope this helps you. Lenny 1/9/2010