Freezer Diagnostics

LG Freezer
Error Codes

Meanings, severity levels, safe checks you can perform, and when to call a technician.

Enter the code shown on your freezer display

Is it safe to keep using it?

Depends on code severity. Low/Medium codes often allow continued use, High severity requires immediate stop.

Can error codes be reset?

Some codes clear after power cycle. Persistent codes indicate underlying issues needing repair.

When should I stop using it?

Stop immediately for water leak codes, burning smell, or any High severity error.

Most Common Codes

FF IS TS DH CO CF

All Codes

CF CO DH FF IS TS

Error Code Directory

Click any code for detailed troubleshooting steps

Low Medium High

Code Meaning Severity Common Symptom

CF Condenser fan motor error High The rear or bottom of the freezer near the compressor is unusually hot because heat is not being dissipated without the condenser fan running View CO Communication error between control boards High The display shows incorrect readings, goes blank intermittently, or buttons stop responding because the display board has lost its data link to the main board View DH Defrost heater fault High Without working defrost cycles, frost accumulates rapidly on the evaporator coils and interior rear wall, eventually becoming a thick sheet of ice View FF Evaporator fan motor failure High The freezer interior temperature rises above the set point even though the compressor is running, causing food to partially thaw or soften View IS Ice sensor fault Medium Ice accumulates unevenly on the walls or floor of the freezer because the sensor-driven defrost cycle is not operating on schedule View TS Temperature sensor fault High Without a valid temperature reading, the control board either keeps the compressor on indefinitely or shuts it off entirely, depending on its failsafe logic View