What Does F9 Mean on a Kenmore Elite Ultra Wave Microwave Oven?

F9 Error Code

• The F9 error code on a Kenmore Elite Ultra Wave microwave is usually due to an inverter board failure. This is an internal component that generally should not be replaced by a homeowner as disassembling a microwave, even when unplugged, may result in shock or injury.

Reset

• When you first see an F9 error code on the microwave oven, the first step is to perform a basic power reset. Unplug the microwave oven and wait 40 to 60 seconds before restoring power. Then try to select a new cooking option and push “Start.” If the error code does not return, the reset was successful, and no further action is necessary.

Open Thermostat

• While the most likely cause of the F9 error code is an inverter failure, the thermostat may have gotten stuck in the open position, which would also result in this error message. Let the microwave oven cool completely then attempt the reset process to see if this resolves the situation. If the error code comes back, contact Kenmore for service.

Wiring

• Another possible source of the problem is faulty wiring within the Kenmore microwave. Again, this is not an issue most owners can resolve on their own due to the technical nature of any microwave troubleshooting or repair. Disconnect the microwave if the power reset does not stop the error code and call Kenmore for assistance.