Samsung Refrigerator Error Code Outer sensor blink (FREEZER display)

This error indicates that the ambient (outer) temperature sensor has failed or is producing a reading outside the valid range, which is below -58°F or above 150°F. The control board monitors this NTC thermistor to help regulate cooling, and when it detects a short circuit, an open circuit, or an out-of-range value, it triggers the blinking alert on the freezer display. The fault can originate at the sensor itself, the connector, or the wiring harness connecting them to the control board.

The refrigerator may continue to run while this error is active, but the control board is not receiving accurate ambient temperature data, which can affect how it manages cooling cycles. Over time, this could lead to inefficient operation or food safety concerns if cooling is compromised. It is best to address the fault promptly rather than operate the unit indefinitely with this error present.

A reset may temporarily clear the error code from the display, but if the underlying fault in the sensor, connector, or wiring has not been corrected, the error will return once the control board re-evaluates the sensor signal. Resetting should be used as part of diagnosis, for example after reseating a connector, to confirm whether the fix resolved the issue. Clearing the code without addressing the root cause does not restore proper sensor function.

Start by locating the ambient sensor connector and inspecting it for loose pins, corrosion, or poor seating, then reseat the connector firmly. Next, use a multimeter to measure the sensor's resistance and compare the reading to the NTC temperature-resistance table for your model. If the resistance is far outside the expected value for the current room temperature, the sensor should be replaced. If the sensor tests correctly, inspect the wiring harness for damage before considering the control board as a possible fault source.

If the fix is simply reseating a loose connector, there may be little to no parts cost, though a service call fee typically applies. Replacing the ambient NTC temperature sensor generally costs between $20 and $80 for the part, plus labor ranging from $80 to $200 depending on your location and the technician. If the wiring harness or control board requires replacement, total repair costs can rise to $150 to $400 or more.