Editorial & technical review
- Written by ApplianceWorth Editorial Team
- Technically reviewed by Victor — appliance technician
- Last reviewed 2026-07-01
- Applies to LG refrigerators
- Confidence medium
- Also displayed as EFS, ERFS
- Sources Manufacturer service documentation and field-repair experience · Methodology · Report a correction
What this code means
The main control is not receiving a plausible signal from the freezer temperature sensor. The sensor, wiring or control input may be open, shorted or otherwise out of range.
Most likely causes
- A failed freezer thermistor
- A loose, corroded or damaged sensor connector
- A broken wire between the sensor and control
- A main-control sensor-circuit fault
Safe checks for the owner
- Monitor actual freezer temperature with an appliance thermometer.
- Keep doors closed and relocate food if the freezer cannot maintain a safe temperature.
- Reset power once to rule out a temporary display fault.
Estimated U.S. repair cost
$220–$420, depending on model, access, parts availability and local labor.