Viking Cooktop Error Code 5 Flashes

The 5 Flashes error code on a Viking induction or electric cooktop indicates a malfunction within the power device temperature sensor circuit. This sensor monitors the thermal condition of the power switching components, typically insulated gate bipolar transistors (IGBTs) or similar high-current switching devices that regulate energy delivery to the cooktop elements. When the control board detects a signal from this sensor that falls outside expected parameters, whether an open circuit, short circuit, or out-of-range resistance reading, it triggers the 5 Flashes fault to protect the unit from thermal damage.

The power device temperature sensor is a critical safety component. It prevents the switching electronics from operating beyond their rated thermal limits, which could otherwise cause catastrophic board failure or fire risk. A malfunction can originate from the sensor itself degrading or failing, from wiring harness damage between the sensor and the control board, or from an actual overtemperature condition that has caused the sensor or surrounding components to fail permanently.

Because this fault directly involves the power electronics section of the cooktop, it should be treated seriously. Continued operation with a faulty temperature sensor removes a key layer of thermal protection. Diagnosis typically requires checking sensor continuity and resistance values, inspecting wiring connections for corrosion or heat damage, and evaluating the condition of the power device board itself.