Viking Range Error Code RTD (Oven Probe)

This error code means the oven control board has detected a fault in the RTD temperature sensor circuit. The RTD probe should measure approximately 1090 ohms at 75 degrees Fahrenheit at connector P15. When the control reads a resistance that is too high, too low, or absent entirely, it triggers this fault and blinks the Cycle light in a 1-second-on/1-second-off pattern. The issue can originate from the probe itself, the wiring harness, the connector, or in rare cases, the control board.

It is not advisable to use the oven when this fault is active. The RTD probe is the primary temperature sensing component, and without an accurate reading, the control board cannot regulate oven temperature correctly. This could result in the oven overheating or failing to reach the set temperature, posing a safety risk and a risk of damage to food or the appliance.

Resetting the range by cycling the power may temporarily clear the fault display, but the code will return if the underlying problem with the RTD probe or its wiring has not been corrected. A reset does not repair a failed sensor, broken wire, or bad connector. The fault should be fully diagnosed and repaired before returning the range to regular use.

A knowledgeable DIYer comfortable with basic electrical testing can diagnose this fault using an ohmmeter to check resistance at connector P15 pin 1 to pin 2. If the probe reads significantly different from 1090 ohms at room temperature, the probe can be replaced by removing it from the oven cavity and unplugging the harness. However, if the wiring or control board is involved, the repair becomes more complex and professional service is recommended.

If only the RTD probe needs replacement, parts typically range from $30 to $100 depending on the specific model, with professional labor adding $100 to $200 or more. If the control board is found to be the cause, board replacement can range from $200 to $500 or higher for parts alone. Getting a diagnostic estimate from a certified technician before committing to repairs is a good approach.