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Error code reference

Kenmore Range Error Code F31

Shorted RTD sensor probe or wiring problem (displayed when oven is in active mode or an attempt to enter an…

Kenmore codesKenmore 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

Let the oven cool down and restart the function. If the problem persists, replace the analog control board.

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 Kenmore range

The F31 error code on a Kenmore range indicates a shorted RTD (Resistance Temperature Detector) sensor probe or a wiring problem within the oven temperature sensing circuit. The RTD sensor is a temperature-sensing resistor that changes its electrical resistance in direct proportion to the oven cavity temperature. When the control board detects a resistance value that falls below the expected threshold for a shorted condition, it interprets this as an out-of-range reading and triggers the F31 fault. This code only appears when the oven is in an active mode, such as bake, broil, or convection, or when an attempt is made to enter one of those modes.

The most common causes include a failed RTD probe that has developed an internal short, damaged wiring in the sensor circuit, or a corroded connector between the sensor and the analog control board. A shorted sensor typically reads near zero ohms rather than the expected resistance at room temperature. Wiring damage can result from prolonged heat exposure, physical wear, or rodent interference, and can cause the same low-resistance reading that mimics a shorted probe.

Diagnosis begins with allowing the oven to cool completely and attempting to restart the desired cooking function. If the F31 code returns immediately upon re-entering an active mode, the fault is persistent and not temperature-related. At that point, the recommended course of action is replacement of the analog control board, though technicians should first inspect and test the RTD sensor and its associated wiring before concluding the board itself is at fault.

Source: manufacturer service documentation.

Common causes of F31

  1. 01

    Shorted RTD sensor probe

    Part replacement

    The RTD probe itself has failed internally, causing it to read near zero resistance instead of the correct value. This is the most likely culprit and can be confirmed by disconnecting the probe and measuring its resistance with a multimeter.

  2. 02

    Damaged sensor wiring

    Part replacement

    The wires running from the RTD probe to the control board may be pinched, burned, or chafed, creating a short circuit in the circuit. Inspect the full length of the wiring harness for visible damage, melting, or contact points against metal edges.

  3. 03

    Corroded or loose wiring connector

    Wiring / connection

    A corroded or improperly seated connector at either the sensor end or the control board end can cause abnormal resistance readings. Disconnecting and inspecting the connectors for oxidation, bent pins, or moisture damage can identify this issue.

  4. 04

    Faulty analog control board

    Part replacement

    If the RTD sensor and all associated wiring test within normal parameters, the analog control board may be misreading the sensor signal due to an internal component failure. Board replacement is the recommended resolution when other causes have been ruled out.

See the test procedure for each cause

Frequently asked questions about F31

What does F31 mean on a Kenmore range?
F31 indicates a shorted RTD sensor probe or a wiring problem in the oven temperature sensing circuit. The code appears when the oven is in an active mode or when you attempt to start a cooking function. The control board detects an out-of-range resistance reading and disables the oven to prevent unsafe operation. Diagnosis involves checking the RTD sensor, the wiring harness, and if necessary, the analog control board.
Will resetting the oven clear the F31 error code?
A reset may temporarily clear the code if the fault was caused by a transient condition. The recommended first step is to let the oven cool completely and then restart the function. If F31 returns when you attempt to use a cooking mode, the problem is persistent and requires hands-on diagnosis and likely a component replacement.
Is it safe to use my Kenmore range while it shows the F31 error?
The oven will not allow active cooking modes to operate while F31 is displayed, which is a built-in safety response. You should not attempt to bypass this fault. The shorted sensor means the control board cannot accurately monitor oven temperature, so operating the oven in this condition would be unsafe. Address the underlying cause before using the oven again.
How do I fix the F31 error code on my Kenmore range?
Start by letting the oven cool fully and attempting to restart the cooking function to see if the code clears on its own. If it persists, the next step is to inspect the RTD sensor probe and its wiring harness for damage, corrosion, or loose connections. If the sensor and wiring appear intact, the analog control board may need to be replaced. A repair technician can use a multimeter to test resistance values and pinpoint the failed component.
How much does it cost to repair a Kenmore range F31 error?
Repair costs vary depending on which component is at fault. Replacing an RTD sensor probe is generally the least expensive fix, with parts typically ranging from around 20 to 60 dollars plus labor. If the analog control board requires replacement, parts costs can range from 100 to 300 dollars or more depending on the model, with additional labor costs if a technician performs the repair.

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