Error code reference

LG Washer Error Code H4

Thermistor wash overheating error

Thermistor wash overheating error – heater worked without water in the tub, or wash thermistor is defective.

First step from the service manual

Check the water level.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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  • Step-by-step tests with expected resistance, voltage, and continuity values
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