Is there a multi-meter test to verify the part is defective?
Answer Hello John. Yes, if there is power to the board, and it does not work, you will need to replace the board in the unit.
Installed new control part # 297370602. works but cant adjust temp. flashing E9.
The E9 would indicate an open thermistor. You will want to check the thermistor for an open circuit and the wiring between the thermistor and the main control board. If correct replace the thermistor 297018400.