The Er IS error code on a Kenmore refrigerator indicates a fault with the ice maker sensor. This sensor monitors the temperature inside the ice maker compartment. When it fails, the ice maker cannot operate correctly and may stop producing ice entirely.
Causes
- Failed ice maker thermistor
- Wiring damage to the sensor
- Ice buildup around the sensor
Troubleshooting
- Defrost the ice maker compartment manually.
- Restart and check for error recurrence.
- If Er IS returns, the sensor requires professional replacement.