LG LRFC21755SB error codes & fixes
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Try E2, temperature, or won’t start.
Error codes
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LG LRFC21755SB Error Code FU
LG LRFC21755SB error code FU means freezer compartment temperature fault (temperature did not drop or rose above threshold). This guide explains the likely causes, the safest first checks,…
LG LRFC21755SB Error Code FS
LG LRFC21755SB error code FS means freezer temperature sensor fault. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
LG LRFC21755SB Error Code FF
LG LRFC21755SB error code FF means freezer fan fault. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
All fixes for this model
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LG LRFC21755SB Error Code FU
LG LRFC21755SB error code FU means freezer compartment temperature fault (temperature did not drop or rose above threshold). This guide explains the likely causes, the safest first checks,…
LG LRFC21755SB Error Code FS
LG LRFC21755SB error code FS means freezer temperature sensor fault. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
LG LRFC21755SB Error Code FF
LG LRFC21755SB error code FF means freezer fan fault. This guide explains the likely causes, the safest first checks, and when support or service is the better next step.
About this model
If your device shows an error code, start with the matching fix page. When a code returns repeatedly, it often points to an underlying cause (temperature, power delivery, sensors, locks, or wear).
Always follow basic safety: unplug before opening anything, and stop if you smell burning or see damage.