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Error code reference
LG Refrigerator Error Code Error2
Refrigerator sensor R1 abnormal (upper part of refrigerator compartment) - short circuit or open circuit.
SourceLG Refrigerator - Full Service Manual: GM-L278BS, GM-L279BTp. 20-21
Diagnostic procedure
The full Error2 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 resistance at both ends of the R1 sensor at CON9 PIN 5,6.
SourceLG Refrigerator - Full Service Manual: GM-L278BS, GM-L279BTp. 20-21
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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