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So this error is actually a communication error between the display board and the mother board. The power supply board would never actually cause this issue for future reference. Now there is no way to test the mother board or the display board to know which one is causing the issue but I can tell you that I have never seen the mother board cause this error. I have probably seen this issue at least 20-30 times and it's always the display board. You'd need to replace the display board to resolve this issue.
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I'm talking about the part that actually has the display attached to it on your control panel---the part where you see the temperature and time of day.
The part number is ***** and it's about $200.