KitchenAid Oven Error Code F59

F59 means the control board detected that the Coil 1/2 NTC temperature sensor was reading below 16°C for at least 30 consecutive seconds. The NTC is a thermistor that monitors induction coil temperature, and when its signal falls out of the valid range for that duration, the oven logs this fault. It typically points to a failed sensor, open wiring, or a loose connector in the NTC circuit.

The F59 code clears automatically when the NTC sensor reads a temperature above 16°C for at least 1 continuous second, not simply from a power reset. If the underlying problem is a failed thermistor or broken wire, cycling the power will not permanently resolve the fault. The error will return as soon as the oven attempts to operate and re-detects the invalid sensor signal.

Repair costs vary depending on the failed component. A replacement NTC thermistor typically costs in the range of $15 to $50 for the part alone. If the IPC control board is at fault, parts can range from $100 to $300 or more depending on the model. Adding professional labor, total repair costs generally fall between $100 and $400, though complex diagnostics or difficult access can push costs higher.

Checking and reseating the NTC sensor connector is something a confident DIYer can attempt after disconnecting power to the oven. Testing the thermistor with a multimeter for continuity and inspecting the wiring harness for visible damage are also reasonable DIY steps. However, if the fault points to the IPC control board or requires disassembling the cooktop to access the coil assembly, professional service is recommended.

Using the oven with an active F59 fault is not recommended. The NTC sensor is part of the thermal protection system for the induction coils, and operating without a valid temperature reading means the control cannot confirm safe coil conditions. Continued use could risk damage to the induction components or create an unsafe operating condition.