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Error code reference
LG Refrigerator Error Code H1
Poor defrosting at upper compartment: defrosting sensor does not reach more than 7°C even when two hours have passed after starting defrost.
SourceLG Kimchi Refrigerator - Service Manual: GR-J303UGp. 12
Diagnostic procedure
The full H1 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 temperature fuse, heater continuity, drain for clogging, and heater driving relay.
SourceLG Kimchi Refrigerator - Service Manual: GR-J303UGp. 12
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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