Samsung Refrigerator Error Code R

The R error code indicates a freezer sensor fault. The control board has detected a temperature reading from the freezer thermistor that is above 149°F or below -58°F, which signals a sensor housing separation, a wiring disconnection, a contact error, or a short circuit in the sensor circuit. It does not necessarily mean the freezer is actually at those temperatures.

Operating the refrigerator with an active R error is not recommended for extended periods. Without reliable sensor data, the control board cannot properly manage defrost cycles or compressor operation, which can lead to temperature instability and potential food spoilage. Address the error as soon as reasonably possible.

A power reset may temporarily clear the error display, but the code will return if the underlying sensor problem has not been corrected. Resetting is useful for confirming whether a fault is intermittent, but it does not repair a damaged sensor, broken wire, or corroded connector. The root cause must be diagnosed and resolved for the error to clear permanently.

A knowledgeable DIYer can start by checking the sensor connector at CN30 Pin 4 and CN76 Pin 1 for loose, corroded, or bent pins and reseating them if necessary. If the connector looks intact, measuring the voltage at those pins (should read 1.0V to 4.5V) or checking the thermistor resistance will help determine if the sensor itself needs replacement. Wiring repairs or component replacement may require more advanced skills and proper tools.

If only a connector needs reseating or cleaning, there may be no parts cost at all. Replacing a failed freezer thermistor typically costs between $15 and $60 for the part. If a professional technician performs the diagnosis and repair, total service costs including labor can range from $100 to $300 depending on your location and the complexity of the repair.