How to Fix / Troubleshooting

Safety First: Disconnect power before accessing the control or sensor wiring.

Locate ambient sensor: On many Kenmore ice makers, the ambient thermistor is mounted near the air intake or behind the front grille.
Check mounting and cleanliness: Ensure the sensor is not touching hot components and is free of dust buildup that could insulate it.
Inspect wiring harness: Follow the sensor wires to the control board. Look for pinched or broken insulation and reseat the connector.
Measure resistance: With the unit unplugged, disconnect the sensor and measure resistance at room temperature. Compare to the service chart. Replace the thermistor if readings are out of range or intermittent.
Control board check: If a known-good sensor still results in E12, the main control board may require replacement.

Kenmore ice maker shows E12 and cycles erratically; ice production may be inconsistent.

Possible Causes