Error code reference

Samsung Refrigerator Error Code 42C

Main PCB to Inverter PCB communication error.

Main PCB to Inverter PCB communication error.

First step from the service manual

Check cable connection; if no cable problem, replace Main and/or Inverter PCB.

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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