I've been trying to help a buddy that is partially blind figure out why is stove won't run on auto, only manual. I replaced the door seal, circuit board and still nothing. Then he tells me that the last time it ran on auto is before he cleaned it. He said he take the obvious parts out, vacuums, but then he told me, he used a wire brush around and down the exhaust. Is it possible he snapped out the ESP? And if so, would that make it not run on auto? Anything else he may have knocked off or broke? Any help in tracking down the issue would be great.