Samsung Range Error Code C2

The C2 error code on a Samsung range indicates a fault within the IGBT (Insulated Gate Bipolar Transistor) temperature sensor circuit on the Inverter Module assembly. The IGBT is a power semiconductor component that controls current flow to the induction heating elements. An onboard analog-to-digital converter continuously monitors the sensor signal: if the A/D value climbs above 239, the control board interprets this as an open circuit condition in the sensor. If the A/D value drops below 10, the board interprets this as a short circuit. Either condition triggers the C2 fault and disables the affected cooking zone to prevent damage to the inverter circuitry.

The most common hardware causes include a defective IGBT temperature sensor, loose or misrouted wiring harness connections at the inverter module, or a failed inverter PCB itself. Because the sensor is mounted directly on or near the IGBT component, any break in the circuit, corrosion at a connector, or physical damage to the sensor will push the A/D value out of its acceptable range. It is also worth noting that the open error condition can be triggered by ambient environmental conditions: if the temperature in the installation area drops below -10 degrees Celsius, the sensor resistance can shift enough to produce an out-of-range A/D reading even on an otherwise functional board.

Diagnosis should begin by inspecting the wiring harness between the inverter module and the main PCB, checking for pinched, burnt, or disconnected wires. The sensor itself should then be tested for continuity and proper resistance values. If wiring and the sensor check out, the inverter module PCB is the likely point of failure and will need to be replaced.