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Error code reference

Viking Oven Error Code F2

Open probe

Viking codesViking oven codes

Open probe – the RTD temperature sensor circuit is open.

First step from the service manual

Replace RTD.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What F2 means on a Viking oven

The F2 error code on a Viking oven indicates an open circuit in the RTD (Resistance Temperature Detector) probe circuit. An RTD sensor works by changing its electrical resistance in a predictable way as temperature rises or falls. The oven control board continuously monitors this resistance to determine the oven cavity temperature. When the circuit is open, meaning no current can flow through the sensor loop, the control board receives no valid resistance reading and triggers F2 to alert the user and prevent unsafe operation.

The RTD probe itself is the most common point of failure. Over time, the sensor element inside the probe can break due to thermal cycling stress, physical damage, or simple component fatigue. A broken internal wire within the probe creates the open circuit condition. The wiring harness that connects the probe to the control board is another potential failure point, as connectors can corrode or wires can become pinched or burned, especially near the oven cavity where heat exposure is significant.

Diagnosing F2 starts with inspecting the RTD probe and its wiring for visible damage, then checking the probe's resistance with a multimeter. A properly functioning Viking RTD probe should read approximately 1080 ohms at room temperature. An open circuit will show no continuity or an infinite resistance reading. If the probe tests as open, it requires replacement. If the probe reads correctly, the fault lies in the wiring harness or the control board connection points.

Source: manufacturer service documentation.

Common causes of F2

  1. 01

    Failed RTD temperature probe

    Part replacement

    The internal sensing element inside the RTD probe has broken, creating an open circuit. Testing the probe with a multimeter will show infinite resistance or no continuity, confirming the probe has failed.

  2. 02

    Broken or burned probe wiring

    Part replacement

    The wires connecting the RTD probe to the control board can become damaged from heat exposure, pinching, or age-related brittleness. Inspect the full length of the harness for visible scorching, breaks, or melted insulation.

  3. 03

    Loose or corroded wiring connector

    Wiring / connection

    The connector between the RTD probe lead and the oven wiring harness can loosen or corrode over time, interrupting the circuit without physically damaging the wire. Unplugging and firmly reseating the connector may resolve this.

  4. 04

    Damaged control board input circuit

    Part replacement

    If the RTD probe and all wiring test correctly, the fault may lie on the control board itself at the sensor input terminals. A burned or failed input circuit on the board will produce the same open-circuit reading.

See the test procedure for each cause

Frequently asked questions about F2

What does F2 mean on a Viking oven?
F2 on a Viking oven means the control board has detected an open circuit in the RTD temperature sensor probe circuit. The RTD is the component that measures oven cavity temperature, and when its circuit is open, the board cannot read any temperature data. This causes the oven to shut down and display F2 as a safety measure. The probe itself is the most likely cause of this fault.
Can I fix a Viking oven F2 error myself?
Many technicians and capable DIYers can resolve an F2 error by replacing the RTD probe, which is typically a straightforward repair involving disconnecting the old probe from inside the oven cavity and connecting the new one. Before purchasing parts, use a multimeter to confirm the probe reads open or infinite resistance at room temperature, which confirms the probe is the failed component. If the probe tests correctly, additional diagnosis of the wiring harness or control board is needed.
Is it safe to use my Viking oven when it shows F2?
No, you should not attempt to use the oven while the F2 code is active. The oven cannot monitor its internal temperature without a functioning RTD probe, which means it has no way to regulate or limit heat output. Operating the oven in this condition creates a risk of uncontrolled overheating. The oven should remain off until the sensor circuit is repaired.
Will resetting my Viking oven clear the F2 error code?
Resetting the oven by cutting power at the breaker may temporarily clear the F2 display, but the code will return as soon as the control board attempts to read the RTD sensor again. Because F2 points to an actual hardware fault in the sensor circuit, the underlying problem must be repaired for the code to stay cleared. A reset alone is not a fix.
How much does it cost to repair a Viking oven F2 error?
If the RTD probe is the cause, the part itself typically costs in the range of $30 to $80 depending on the specific Viking model, and the repair is relatively inexpensive if done as a DIY project. Professional repair labor for a probe replacement generally runs in the range of $100 to $200 total including the part. If the control board is at fault rather than the probe, repair costs increase significantly, with board replacement often falling in the range of $200 to $500 or more for parts and labor.

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