KitchenAid Oven Error Code F56

F56 indicates that the NTC thermistor mounted on the control board has detected a temperature outside the acceptable range of -10°C to 87°C, or has failed in an open or shorted condition. The oven responds by shutting off most electrical loads to protect the board. The fault must persist for at least one second before it is logged. It clears automatically when the board temperature drops below 82°C for at least one second.

When F56 is active, the oven has already taken protective action by switching off most loads, so continuing to attempt operation is not recommended. Running the oven repeatedly through F56 fault cycles without addressing the cause risks damaging the control board further. It is best to stop using the oven until the fault has been properly diagnosed.

Repair costs depend on the root cause. If the fix is limited to cleaning ventilation paths or reseating a connector, out-of-pocket costs may be minimal. Replacing a cooling fan typically runs in the range of $50 to $150 for parts and labor. If the control board itself needs replacement, costs can range from $200 to $500 or more depending on the specific model and whether professional installation is needed.

The F56 fault is designed to clear on its own once the control board temperature drops below 82°C for at least one second, without requiring a manual reset. However, simply power-cycling the oven may temporarily clear the display while the underlying cause remains. If the code returns during normal use, the root cause such as a failed NTC, blocked ventilation, or a faulty cooling fan needs to be diagnosed and corrected.

Start by confirming the control board area has adequate ventilation and that no airflow is blocked. Next, check that any cooling fan associated with the control enclosure is operating correctly. If ventilation is not the issue, the board-mounted NTC thermistor should be tested for proper resistance values, and all associated wiring connections should be inspected for corrosion or looseness. If the thermistor or the control board itself has failed, replacement of the affected component will be necessary.