Samsung Refrigerator Error Code F R (I/M-Sensor blinking)

This error code indicates that the sensor system inside the ice maker in the freezer compartment has detected a fault. The ice maker relies on a thermistor sensor to monitor temperature, and when that sensor stops returning valid readings, the control board triggers this alert. Ice production will typically stop until the fault is resolved. A technician should check the sensor, its wiring, and the connector for damage or failure.

The refrigerator's cooling function for the main compartment is generally not affected by this error, so food safety is not immediately at risk. However, the ice maker will not operate correctly while the fault is active. It is still advisable to have the sensor issue diagnosed and repaired promptly to avoid any secondary issues from an unmonitored ice maker compartment.

A power reset may temporarily clear the error code display, but if the underlying sensor fault is still present, the code will return once the refrigerator runs its diagnostic cycle again. Resetting the unit does not repair a failed thermistor, damaged wiring, or a corroded connector. A proper diagnosis following the appropriate diagnostic flow is needed to permanently resolve the fault.

Some causes, such as a disconnected wiring harness or ice buildup around the sensor, can be addressed without replacing parts. However, accurately diagnosing this code requires following a specific diagnostic flow and may involve measuring sensor resistance with a multimeter. If the thermistor or ice maker assembly has failed, part replacement is required, which is typically a job for an experienced technician or confident DIYer.

Repair costs vary depending on what component has failed. If only the wiring or connector needs attention, labor costs may be the primary expense, typically in the range of $75 to $150 for a service call. Replacing the ice maker thermistor sensor can add $20 to $60 in parts, while a full ice maker assembly replacement can bring total costs to a range of $150 to $350 or more depending on the model and labor rates in your area.