Error code reference

LG Washer Error Code C1

Water level sensor fault

Water level sensor fault - hose damaged, clogged, folded, too much lubricant on insertion part, hose disengaged, faulty internal soldering, terminal disengaged, or Main PBA fault.

First step from the service manual

Check water level sensor terminal connections and check part code of the water level sensor for correct part.

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
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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