I have Double Wall Oven - Oven - Wirlpool Gold GBD307PDS7 - The upper oven works however the upper blower fan doesn't come on. If you use the upper oven too long the display will start to get dim and shut off. We have been using the lower oven for a year or more, however the lower oven works most of the time now and the lower blower fan does come on, no upper blower fan. However now it too will sometimes just shut down, no display and nothing works. However if you leave it the display will come back on.

I pulled the oven out of the wall and removed the upper blower fan and plugged it into 120VAC, it started to run and blow air.

Any Idea's on what part to replace, control board?

Thank You