Error code reference

Frigidaire Range Error Code F31

Shorted RTD sensor probe or wiring problem

Frigidaire codesFrigidaire range codes

Shorted RTD sensor probe or wiring problem. Displayed when oven is in active mode or an attempt to enter an active mode is made.

First step from the service manual

Check wiring in probe circuit for possible open condition. Check RTD resistance at room temperature (compare to probe resistance chart). If resistance does not match the chart, replace the RTD sensor probe. Let the oven cool down and restart the function. If the problem persists, replace the EOC.

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

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What F31 means on a Frigidaire range

The F31 error code indicates the Electronic Oven Control (EOC) has detected a shorted condition in the RTD (Resistance Temperature Detector) sensor probe circuit. Unlike an open circuit fault, a short drives resistance abnormally low, typically below 500 ohms, which causes the control board to read an invalid temperature signal. The fault can originate at the probe itself, the wiring harness between the EOC and the probe connector, or the connector junction where the two meet.

For homeowners, the RTD sensor probe is a small temperature-sensing rod mounted inside the oven cavity, usually at the back wall. It continuously reports oven temperature to the control board so the oven can regulate heat accurately. When the F31 code appears, the control board is seeing an electrical short somewhere in that sensing circuit, which means it cannot trust the temperature readings. As a result, the oven will not operate safely and will shut down the baking or broiling function until the fault is resolved.

Triggering conditions include physical damage to the probe, a pinched or melted wiring harness, or a failed probe that has developed an internal short. The fault is persistent once triggered and will return after resetting unless the underlying short is corrected.

Source: manufacturer service documentation.

Common causes of F31

  1. 01

    Failed RTD Sensor Probe (internal short)

    Part replacement

    The RTD sensor probe itself can develop an internal short, dropping resistance below 500 ohms. This is the most common cause and is confirmed by measuring probe resistance with a multimeter at room temperature and comparing it against the RTD resistance chart.

  2. 02

    Shorted wiring harness between EOC and probe connector

    Part replacement

    The harness wires running from the EOC to the probe connector can become pinched, melted by oven heat, or chafed against a sharp edge, causing the conductors to short together. This produces the same low-resistance reading as a failed probe even if the probe itself tests good.

  3. 03

    Damaged or corroded probe connector

    Wiring / connection

    The connector joining the probe harness to the probe can accumulate grease, moisture, or corrosion that bridges the terminals and creates a short circuit. Inspecting and cleaning or replacing the connector can resolve the fault in this scenario.

  4. 04

    Faulty Electronic Oven Control (EOC)

    Part replacement

    In rare cases, an internal failure in the EOC itself causes it to falsely report a shorted probe condition even when the probe and harness test within normal resistance values. This is considered only after the probe and harness have been ruled out.

See the test procedure for each cause

Frequently asked questions about F31

What does the F31 error code mean on a Frigidaire range?
F31 means the Electronic Oven Control has detected a shorted connection in the RTD sensor probe circuit. The control board monitors resistance from the oven temperature sensor, and when that resistance drops below the expected range (typically below 500 ohms), it flags the short and disables oven operation. The fault can be in the probe itself, the wiring harness, or the connector between them.
How do I fix the F31 error code on my Frigidaire range?
Start by unplugging the range and locating the RTD sensor probe inside the oven cavity. Disconnect the probe and measure its resistance with a multimeter at room temperature, then compare that reading to the RTD resistance chart in your service manual. If resistance is below 500 ohms, replace the probe. If the probe tests normal, inspect the wiring harness from the probe connector back to the EOC for pinched, melted, or shorted wires and replace or repair the harness as needed.
Can I still use my Frigidaire range while the F31 code is active?
The oven functions will not operate while F31 is active because the control board cannot reliably read oven temperature. Surface burners on a gas range may still ignite, but you should not attempt to bypass or ignore the fault. Running the oven without a functioning temperature sensor creates a risk of overheating, so the oven should remain out of service until the shorted probe or harness is repaired.
How much does it cost to repair an F31 error on a Frigidaire range?
An RTD sensor probe is typically a low-cost part, ranging from roughly $20 to $50 depending on the model, and replacing it is a manageable DIY repair requiring only basic tools. If the wiring harness is damaged, the harness itself may cost $30 to $80 in parts, though routing and securing it correctly can be more involved. If the EOC needs replacement, parts and labor from a technician can push total costs to $200 or more, so exhaust the probe and harness diagnosis first.
Will resetting my Frigidaire range clear the F31 code?
Cutting power to the range for a few minutes may temporarily clear the F31 display, but the code will return as soon as the control board re-checks the sensor circuit and detects the short again. A reset does not correct the underlying electrical fault. The probe resistance and harness condition must be physically inspected and the shorted component replaced before the code will stay cleared.

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