KitchenAid Cooktop Error Code e3

The E3 error code on a KitchenAid cooktop indicates an open circuit condition in the NTC (Negative Temperature Coefficient) sensor. The NTC sensor is a thermistor responsible for monitoring the temperature of the cooktop's heating zone or control electronics. In a properly functioning system, the sensor's electrical resistance decreases predictably as temperature increases, allowing the control board to regulate heat output accurately. An open circuit means the electrical path through the sensor has been completely broken, and the control board is receiving no signal at all rather than a valid resistance reading.

The most direct cause of an open circuit NTC sensor is physical failure of the thermistor element itself, which can occur due to thermal stress, age-related degradation, or a manufacturing defect. However, the fault can also originate in the wiring harness connecting the sensor to the control board. A broken wire, corroded connector pin, or a connector that has pulled loose from vibration or heat cycling will produce the same open circuit signal as a failed sensor. Inspecting the wiring and connectors between the sensor and control board is an important step before replacing the sensor outright.

Because the cooktop has lost its ability to monitor temperature in the affected zone, it will typically disable that burner or heating element entirely as a safety measure. The control board cannot safely regulate power output without valid temperature feedback, so the error will persist until the fault is resolved. The primary corrective action is replacement of the NTC sensor, but a thorough wiring inspection should accompany the repair to rule out connector or harness issues.