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Error code reference
LG Refrigerator Error Code Er 10
Communication error between main PCB and display PCB (continuous information exchange failed for more than 2 minutes).
SourceLSC27921 Series Refrigerator - Full Service Manualp. 20-21, 35
Diagnostic procedure
The full Er 10 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 water tank sensor resistance with a multimeter.
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
2 manuals in the MyPros+ library document this code for LG refrigerator.
Models covered by the manuals that document this code
75,000+ service documents · 20,000+ error codes · 100+ brands
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