Jenn-Air Oven Error Code 1c31

Error code 1c31 on a Jenn-Air oven indicates a cancel key circuit failure, specifically that the analog-to-digital (A/D) input signal from the cancel key has fallen outside the expected range. The electronic control board continuously monitors the keypad inputs through an A/D converter, which reads voltage levels corresponding to each key press. When the cancel key circuit produces a signal that does not match the expected voltage window, the control flags this fault and disables all outputs as a safety measure, meaning the oven will not operate in any mode until the fault is resolved.

The cancel key is part of the membrane keypad assembly and communicates with the control board through a low-voltage signal circuit. A failure can originate at the key itself, in the ribbon cable connecting the keypad to the control board, or within the control board's input circuitry. Physical damage, moisture intrusion, or a short circuit in the keypad membrane can cause the A/D reading to read high or low, triggering the fault. Corrosion on connector pins between the keypad and the board is another frequent contributor.

Because all outputs are disabled when this code is active, the oven is rendered non-functional until the underlying fault is corrected or the component is replaced. Diagnostics should begin by inspecting the cancel key circuit, including the keypad ribbon connector and the control board input terminals. If the keypad membrane tests faulty, the entire keypad assembly typically requires replacement. If the keypad checks out and the fault persists, the control board itself may have a failed A/D input circuit and would need replacement.