LG Refrigerator Error Code Er (Ice Removal Sensor)

The Er code signals that the LG refrigerator has detected a snapping (open circuit) or short-circuit condition in the ice-making sensor. This sensor is a thermistor that monitors temperature inside the ice maker assembly. The code appears during the refrigerator's LED diagnostic check mode and indicates the control board is receiving an invalid signal from that sensor.

The refrigerator's main cooling functions are generally separate from the ice maker sensor circuit, so food safety is not immediately compromised. However, the ice maker may not operate correctly or may stop producing ice entirely while this fault is active. It is advisable to address the fault promptly to avoid further issues with the ice maker assembly.

A power reset may temporarily clear the error from the display, but if the underlying sensor fault is still present, the code will return when the LED diagnostic check runs again. The root cause, whether a failed thermistor, damaged wiring, or a corroded connector, must be physically diagnosed and corrected for the error to be permanently resolved. Relying on resets alone will not fix the ice maker.

Start by running the LED diagnostic check to confirm the fault, then measure resistance at the CON8 connector terminals to determine whether the sensor or wiring is at fault. Inspect the connector for corrosion or loose pins and the wiring harness for any visible damage. If the sensor resistance is out of range, replacing the ice-making thermistor is typically required to resolve the error.

If only the CON8 connector needs cleaning or reseating, the repair may cost very little beyond a service call fee, typically in the range of $75 to $150. If the ice-making thermistor sensor itself needs replacement, parts and labor combined generally range from $100 to $250 depending on your location and the technician's rates. Wiring harness replacement, if needed, can push costs toward the higher end of that range.