F9 or F9E0 - Built-In Microwave

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Possible Solutions

New installation or electrical connection?

If this appliance was newly installed check to ensure the electrical was installed correctly. This code will most often indicate that the appliance is wired incorrectly at the home electrical supply or the hardwire connection. If your range was installed recently and is not functioning, contact a qualified electrician to verify the electrical supply.

Was there a power outage or power surge?

During a power outage, if there was a surprising amount of power supply line "noise" that the control detected as an incorrect voltage amount, the control could display the F9, F9 E0, or PF Error Code. Also, if any keys were pressed before the 10-second delay interval on power-up, this could cause the F9, F9 E0, or PF to appear.

Reset the appliance

Power unit down by turning off the circuit breaker(s) for one (1) minute.
Power unit up by turning on the circuit breaker(s).
Monitor the range or oven for one (1) minute to ensure the error code does not display again.
Verify the range or oven operation.