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Error code reference
LG Refrigerator Error Code Er 1
Refrigerator sensor failure - short or open wires on the refrigerator sensor located in the control box.
SourceLG Refrigerator - Full Service Manual (GM-H501ULH)p. 23, 35-37
Diagnostic procedure
The full Er 1 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 for loose connection at CON4; measure resistance between White and White wires at CON4.
SourceLG Refrigerator - Full Service Manual (GM-H501ULH)p. 23, 35-37
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
5 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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