Viking Range Error Code 2 flashes

The 2 flashes error code on a Viking range indicates an RTD (Resistance Temperature Detector) fault in the 48-inch left-hand oven and griddle zone. The thermostat control monitors the RTD probe continuously during operation, and when it detects either an open circuit or a short circuit condition in the probe circuit, it triggers this fault code. The RTD probe is a temperature-sensing resistor whose resistance value changes predictably with temperature, allowing the control board to calculate precise oven cavity temperatures. When the resistance reading falls outside the expected range, whether too high (open) or too low (shorted), the control flags the error and typically disables the affected heating zone.

The RTD probe itself is a thin metallic sensor inserted into the oven cavity, connected to the thermostat control via a two-wire circuit. An open condition means the circuit is broken, producing infinite or unmeasurably high resistance. A short condition means the two wires have made contact with each other or with ground, producing near-zero resistance. Both conditions give the control board a temperature reading that is impossible or implausible, preventing safe oven operation. The probe connector, wiring harness, and the probe element itself are all potential failure points in this circuit.

Diagnosing this fault begins with measuring the RTD probe resistance at the probe terminals using a multimeter. A properly functioning RTD probe on Viking ranges typically reads within a specific resistance range at room temperature. A reading of infinite resistance confirms an open probe, while a reading near zero ohms confirms a short. If the probe resistance reads correctly, the fault may lie in the wiring between the probe and the thermostat control, or in the control board itself.