Samsung Refrigerator Error Code 5

Error code 5 on a Samsung refrigerator signals an R Defrost Sensor Error. The control board has detected a problem with the defrost thermistor in the refrigerator compartment, either due to a disconnected connector, sensor housing separation, a short circuit in the wiring, or a temperature reading outside the range of -58°F (-50°C) to 149°F (+65°C). The issue must be diagnosed and repaired to restore normal defrost cycle operation.

Running the refrigerator with an active defrost sensor fault is not recommended for extended periods. Without reliable defrost sensor input, the defrost cycle may not operate correctly, which can lead to frost buildup on the evaporator coils and eventually reduced or lost cooling. Food safety may be compromised if cooling performance degrades. Address the fault as soon as possible.

A power reset, performed by unplugging the refrigerator for a few minutes and then restoring power, may temporarily clear the display, but code 5 will return if the underlying sensor fault has not been corrected. The control board will re-detect the out-of-range or open circuit condition once it begins monitoring the sensor again. A permanent fix requires identifying and resolving the root cause, whether that is a wiring issue, connector problem, or a failed thermistor.

Some causes of error code 5 are DIY-accessible. Checking and reseating the sensor connector and confirming the sensor housing is properly mounted require no special tools and can be done by a careful homeowner after unplugging the refrigerator. However, resistance testing of the thermistor and inspecting the wiring harness for shorts requires a multimeter and some technical familiarity. If the sensor itself has failed, replacing it involves accessing the interior liner panels, which is better handled by a technician.

If the fix is simply reseating a loose connector, there is no parts cost and only minimal labor if you hire a technician. If the defrost thermistor sensor needs to be replaced, the part typically costs in the range of $15 to $60 depending on the specific model, with professional labor adding $80 to $200 or more depending on your location and the service provider.