Samsung Refrigerator Error Code Freezer 2nd digit c

The "c" in the second digit of the freezer display indicates a defrost sensor error. The main PCB has detected that the freezer defrost sensor is reporting a temperature above +50°C or below -50°C, which falls outside the valid range. This can be caused by a disconnected connector at CN30, a broken wire, a short circuit, or a failed sensor. The voltage at CN30 pins 2 and 6 should read between 1.0V and 4.5V under normal operation.

Continued use is not recommended without addressing the fault. A non-functional defrost sensor means the control board cannot properly manage defrost cycles, which can lead to heavy ice buildup on the evaporator coil over time. This can eventually block airflow and cause the freezer and refrigerator sections to lose cooling ability. Food safety can be compromised if temperatures are not maintained.

If the fix is simply reseating a loose connector, there is no parts cost involved. Replacing a defrost sensor typically costs between $15 and $60 for the part, depending on the model. If professional labor is required, total repair costs including parts and labor generally range from $100 to $250. Main PCB replacement, if needed, is more expensive and can range from $200 to $400 or more.

In some cases, yes. Start by checking whether the sensor connector at main PCB CN30 has simply come loose, as reseating it may resolve the fault. If you are comfortable using a multimeter, you can verify the voltage between CN30 pins 2 and 6 to determine whether the issue is the connector, the wiring harness, or the sensor itself. Replacing the defrost sensor is a moderate DIY repair, but working near the main PCB carries some risk, so those unfamiliar with appliance electronics may prefer professional service.

A power reset may temporarily clear the error code, but it will return if the underlying fault is not repaired. The main PCB will re-detect the out-of-range sensor reading or open circuit on the next defrost cycle check. Resetting without diagnosing and fixing the sensor, wiring, or connector does not resolve the problem.