Error code reference
LG Dishwasher Error Code HC
Heater overheat (S/W ver. 7134+)
Heater overheat (S/W ver. 7134+): temperature measured as equal to or greater than 176°F for 3 seconds; driving parts stop and main relay turned off.
First step from the service manual
Check the Heater and Thermistor operation.
The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.
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Get the full diagnostic procedure for HC.
- Step-by-step tests with expected resistance, voltage, and continuity values
- Wiring diagram references and connector pinouts from the OEM service manual
- Verified part numbers when replacement is required
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