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Error code reference

Kenmore Range Error Code 1c31

Incorrect key value cancellation (upper cavity)

Kenmore codesKenmore range codes

Incorrect key value cancellation (upper cavity) – disables all outputs for cavity 1.

First step from the service manual

Check keypad and control board.

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

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What 1c31 means on a Kenmore range

Error code 1c31 on a Kenmore range indicates an incorrect key value cancellation event in the upper cavity (cavity 1). When this code appears, the control system detects that a keypad input has returned an invalid or out-of-range signal, causing the board to cancel that key's function and subsequently disable all outputs for the upper oven cavity. This is a protective response: rather than act on a corrupted command, the control board shuts down heating elements, broil elements, and any associated functions for cavity 1 to prevent unintended operation.

The two primary components involved are the keypad membrane assembly and the main control board. The keypad communicates with the control board through a matrix of electrical contacts. When a key is pressed, it should return a specific resistance or voltage value that the control board maps to a function. If that value falls outside the expected range, due to a worn contact, moisture intrusion, or a partial short in the keypad ribbon cable, the board interprets this as an incorrect key value and triggers the 1c31 fault.

Control board failures can also produce this code, particularly if the input-scanning circuitry on the board degrades or if a solder joint on the keypad connector becomes intermittent. Because the fault disables all outputs for the upper cavity, the range will not heat on that side until the underlying cause is corrected. Diagnosis should begin with a close inspection of the keypad for physical damage, sticking keys, or moisture, followed by evaluation of the control board and the ribbon cable connection between the two components.

Source: manufacturer service documentation.

Common causes of 1c31

  1. 01

    Faulty or worn keypad membrane

    Part replacement

    Over time, the conductive contacts beneath the keypad membrane can wear or delaminate, causing keys to send incorrect voltage or resistance values to the control board. Look for keys that feel mushy, stick when pressed, or show visible wear on the overlay surface.

  2. 02

    Moisture or contamination in the keypad

    Part replacement

    Spills or steam that penetrate beneath the keypad overlay can short adjacent contacts or corrode the membrane circuit traces, producing erratic key values. Inspect the keypad area for discoloration, residue, or visible moisture under the overlay.

  3. 03

    Loose or damaged ribbon cable connection

    Wiring / connection

    The ribbon cable connecting the keypad to the control board can develop intermittent contact if the connector is loose, the cable is kinked, or the locking tab on the connector is not fully seated. Check that the cable is fully inserted and undamaged along its length.

  4. 04

    Control board input circuit failure

    Part replacement

    If the keypad checks out as functional, the fault may originate in the control board's key-scanning circuitry. Degraded components or a failed solder joint at the keypad connector on the board can cause the board to misread otherwise correct key signals.

  5. 05

    Temporary electronic glitch

    Wiring / connection

    A brief power fluctuation or static event can cause the control board to log a spurious key value error. This is less common but possible, and a power reset may clear the code if no physical fault exists.

See the test procedure for each cause

Frequently asked questions about 1c31

What does 1c31 mean on a Kenmore range?
Error code 1c31 indicates that the control board detected an incorrect key value from the upper cavity keypad and canceled that input as a safety measure. As a result, the control board disables all outputs for the upper oven cavity, meaning the upper oven will not heat. The fault points to a problem with the keypad, the ribbon cable connecting it to the control board, or the control board itself.
Can I fix the 1c31 error myself?
A knowledgeable DIYer can handle some steps, such as checking the ribbon cable connection between the keypad and control board for looseness or damage. Replacing the keypad membrane is also a manageable repair for someone comfortable working with appliance control panels. However, if the control board's input circuitry has failed, board replacement is more involved and may benefit from professional service.
Is it safe to use my Kenmore range while the 1c31 code is active?
Because the 1c31 fault disables all outputs for the upper oven cavity, that portion of the range will not operate while the code is active. The range is designed to prevent unintended heating when a corrupted key signal is detected, so there is no risk of the upper oven running unexpectedly. Lower cavity functions, if your range has them, may still be operational, but you should address the fault before relying on the appliance for regular use.
Will resetting the range clear the 1c31 error code?
A power reset, done by unplugging the range or switching off the circuit breaker for one to two minutes, may clear the code if the fault was caused by a temporary electronic glitch. However, if the keypad membrane is physically worn, contaminated, or the control board has a hardware defect, the code will return after the reset. A reset is a reasonable first step, but a recurring 1c31 code requires component-level diagnosis.
How much does it cost to repair a Kenmore range showing the 1c31 error?
Repair costs vary depending on which component has failed. A replacement keypad membrane typically runs in the range of $30 to $100 for parts, while a new control board can cost anywhere from $150 to $400 or more depending on the specific model. If you hire a technician, add labor costs of roughly $80 to $150 per hour on top of parts. Getting a diagnosis before ordering parts helps avoid unnecessary expense.

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