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Hello, either one of the high temperature limit switches, or other safety switch is tripped (open) or the printed circuit board is bad.
Diagnosis is involved. If you have a multi meter and are good with appliance repair send me a close up photo of the wiring diagram glued to the service panel, photo must be close up, well lit, and exceedingly well focused.
Use the attach files link next to the send button to post the picture here, and I will mark it up with trouble shooting instructions.