Viking Range Error Code RTD Prob

The RTD Prob error code on a Viking range indicates that the RTD (Resistance Temperature Detector) oven temperature sensor has been detected as either open or shorted. The RTD is a probe-style sensor mounted inside the oven cavity that monitors temperature by changing its electrical resistance in response to heat. The Electronic Oven Control (EOC4) continuously reads this resistance to regulate baking and broiling temperatures as well as self-cleaning cycles. When the resistance signal falls outside the expected range, either dropping to near zero (short) or rising to an open circuit, the control board cannot interpret oven temperature and triggers the RTD Prob fault.

An open RTD condition typically means the sensor circuit is broken, either because the probe itself has failed internally, a wiring connection has come loose, or the wire harness between the sensor and the EOC4 board has been damaged. A shorted condition means two conductors in the circuit are making unintended contact, producing a resistance reading that is far too low. Both conditions make accurate temperature control impossible, which is why the EOC4 board becomes fully inoperable when this fault is active.

When this error appears, any active COOK or CLEAN cycle must be cancelled immediately and the range should be powered down at the breaker. The primary corrective actions are to inspect the RTD probe and its wiring harness for physical damage or loose connectors, reseat the sensor plug at the control board if it has become dislodged, or replace the RTD sensor entirely if the probe has failed. The range will not return to normal operation until the sensor circuit reads within an acceptable resistance range.