Error code reference
LG Dishwasher Error Code 4E
Water supply error
Water supply error: detected water supply pulses less than 4 within 40 seconds after water is supplied, or target water level not reached within 10 minutes.
First step from the service manual
Check whether the faucet is open.
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 4E.
- 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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