Samsung Refrigerator Error Code Freezer Low (flickering)

This error indicates the control board detected a fault with the freezer room temperature sensor during its initial self-diagnostic check. The sensor is reading either below -50°C, which signals an open circuit, or above +65°C, which signals a short circuit. Both conditions mean the sensor or its wiring is not functioning correctly, not that the freezer is actually at those temperatures. The flickering display is how the refrigerator communicates this specific sensor fault.

When the F room sensor is faulted, the control board may not be able to accurately monitor or regulate freezer temperature, which can lead to inconsistent cooling or compressor control issues. Continuing to use the refrigerator for extended periods with this fault active risks food safety, particularly in the freezer. It is best to address the error promptly rather than relying on the unit to maintain proper temperatures without a functioning sensor.

Repair costs depend on what component has failed. A replacement F room thermistor is typically an inexpensive part, and the total repair cost including labor generally ranges from around $100 to $250 if only the sensor needs replacement. If the wiring harness or control board is at fault, costs can range from $150 to $400 or more depending on the specific model and labor rates in your area. Getting a diagnostic estimate from a technician before authorizing repairs is a good way to understand the scope.

A knowledgeable DIYer can start by inspecting the freezer room sensor connector and wiring for visible damage, loose connections, or corrosion. Testing the thermistor's resistance with a multimeter will confirm whether the sensor itself has failed. If the sensor or wiring needs replacement, those repairs are generally accessible, though working inside a refrigerator's sealed compartments and identifying the correct parts does require some technical comfort. If the fault points to the control board, professional service is recommended.

A power reset may temporarily clear the display, but the error will return during the next startup self-diagnosis if the underlying sensor fault is still present. The control board runs this diagnostic check each time the unit powers on, so a reset alone does not fix the problem. The sensor, wiring, and connectors need to be inspected and repaired or replaced to resolve the error permanently.