Samsung Refrigerator Error Code R-1 segment b

R-1 segment b indicates a failure in the fridge room temperature sensor (R-Sensor) on Samsung T/E/W model refrigerators. The main PCB is not receiving a valid signal from the thermistor that monitors the fresh food compartment temperature. The expected voltage between main PCB connector pins CN31-3 and CN31-6 should be between 0.5V and 4.5V. A reading outside that range confirms the fault.

Continued use is not recommended without monitoring, because if the fridge room temperature sensor has failed the refrigerator may not cool the fresh food compartment reliably. Food safety can be compromised if temperatures rise above 40 degrees Fahrenheit for extended periods. It is best to address the error promptly and use a standalone thermometer to verify compartment temperature in the meantime.

Repair costs vary depending on the failed component. A replacement fridge room thermistor is generally an affordable part, with total repair costs including labor typically ranging from around $100 to $250. If the main PCB is the cause, parts and labor costs can range from $200 to $450 or more depending on the specific model and service rates in your area. Getting a diagnostic quote from a technician before committing to the repair is advisable.

A knowledgeable DIYer with a multimeter can perform the initial voltage check at main PCB connector CN31 to determine whether the problem is in the wiring or the sensor itself. If the thermistor has failed, replacing it is a relatively straightforward repair involving disconnecting the old sensor and installing a compatible replacement. However, if the main PCB is at fault, that repair is more complex and typically benefits from professional service.

A reset may temporarily clear the error code from the display, but the fault will return if the underlying problem with the R-Sensor or its wiring has not been repaired. Resetting without fixing the root cause does not restore normal sensor operation and the refrigerator will continue logging the fault. A proper repair of the sensor circuit is required to permanently resolve the code.