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Error code reference
LG Refrigerator Error Code Er 9
Defrost malfunction: defrost sensor did not reach 41°F (5°C) within 1 hour during defrost cycle (80 min timeout).
SourceLSC27921 Series Refrigerator - Full Service Manualp. 19-21
Diagnostic procedure
The full Er 9 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 ice maker ejection motor resistance at CON9 terminals (9,10); should be 18-22 ohms.
SourceLG Refrigerator - Service Manual: GM-L279UTRM / GM-L273UQRMp. 16
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
3 manuals in the MyPros+ library document this code for LG refrigerator.
Models covered by the manuals that document this code
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