Samsung Refrigerator Error Code Freezer 2nd digit a

This code indicates an error with the ambient (external) temperature sensor. The refrigerator's main control board is receiving a signal that is either out of the expected voltage range or represents a temperature reading at or beyond the +50°C or -50°C limits. The cause can be a failed sensor, a disconnected connector, a cut wire, or a short circuit in the sensor circuit.

The refrigerator may continue to operate while this code is active, but it cannot properly compensate for ambient room conditions without a functioning ambient sensor. This could affect cooling efficiency and compressor cycling over time. It is best to diagnose and resolve the fault promptly rather than running the appliance in a degraded state.

A power reset may temporarily clear the error code from the display, but the code will return if the underlying fault is still present. The ambient sensor circuit needs to be tested and the root cause corrected for the error to stay cleared. Do not rely on resets as a substitute for proper diagnosis.

In some cases, yes. Start by checking the connector at main PCB CN31, pins 1 and 3, and confirming the voltage reads between 1.0V and 4.5V. If the connector is loose, reseating it may resolve the error. If the wiring or sensor has failed, replacing those components is a more involved repair that requires comfort working around refrigerator electronics.

If the fix is simply reseating a loose connector, there is no parts cost. Replacing the ambient temperature sensor typically costs between $15 and $60 for the part, plus labor if a technician is hired. If the main PCB is the source of the fault, the part cost can range from $100 to $300 or more depending on the model.