Error code reference
LG Dishwasher Error Code tC
Temperature sensor data output is out of range (greater than approximately 4.5V or less than approximately…
Temperature sensor data output is out of range (greater than approximately 4.5V or less than approximately 0.2V), or water temperature detected as -3°C or less for 30 seconds during heater operation.
First step from the service manual
Check thermistor connections and measure resistance/voltage values.
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 tC.
- 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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