Error code reference

LG Refrigerator Error Code R4

Failure of Defrost mode: defrost sensor does not reach 50°F (10°C) within 1 hour after starting defrost. Compressor operates normally, Freezer Motor operates normally, Defrost Heater operates normally.

SourceLG LTC20380/LTC24380 Refrigerator - Full Service Manualp. 25

Diagnostic procedure

The full R4 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check defrost heater, defrost sensor, and defrost circuit components.

SourceLG LTC20380/LTC24380 Refrigerator - Full Service Manualp. 25

More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Where this code is documented

12 manuals in the MyPros+ library document this code for LG refrigerator.

Models covered by the manuals that document this code

More models are covered than are listed here.

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