Samsung Refrigerator Error Code Mid

The Mid code signals a failure of the RD-Sensor, the defrost sensor located in the refrigerator compartment. The control board triggers this code when the sensor reports a temperature above +50°C or below -50°C, which is outside any realistic operating range. This indicates the sensor has lost its connection, has a wiring fault, or has failed internally. The refrigerator flags it so the defrost cycle is not run incorrectly based on bad sensor data.

The Mid code means the defrost cycle cannot operate reliably, which can lead to progressive frost buildup on the evaporator over time. Continued use without repair may eventually reduce cooling performance and could cause the compressor to work harder than intended. Food safety depends on how well the refrigerator is currently cooling, so monitor interior temperatures and address the fault promptly.

A power reset by unplugging the refrigerator for a few minutes may temporarily clear the code from the display, but the error will return if the underlying sensor or wiring fault is still present. A reset does not repair a disconnected connector, broken wire, or failed sensor. The code will continue to reappear until the root cause is identified and corrected.

A homeowner comfortable with basic appliance repair can start by locating the RD-Sensor connector in the refrigerator compartment and confirming it is fully seated. Visually inspecting the wiring harness for obvious damage is also a reasonable first step. However, testing sensor resistance and wiring continuity requires a multimeter and some familiarity with reading electrical values, so less experienced users may want to call a technician for those steps.

If only the connector needs reseating, there may be no parts cost, though a service call fee typically runs in the range of $75 to $150. Replacing the RD-Sensor thermistor itself usually costs between $15 and $50 for the part, with total repair costs including labor generally falling in the range of $100 to $250 depending on your location and the technician's rates.