Lower control board. Make sure the belt is lubricated as well. Just to ensure functionality.
I've provided a quick guide to determine if the motor is the issue. PLEASE DO NOT RUN AC INTO THE MOTOR, this will immediately blow the motor, and circuit breaker, and permanently damage the motor. The motor should spin with ease with little to no noise.
if the motor works and the belt has been calibrated and lubricated and you confirmed the motor start capacitor is good then, the issue is a faulty board and it will need to be replaced. At your earliest convenience get back to us with the results. Thank you.