Samsung Refrigerator Error Code R-1 (Ice Maker Sensor Error)

The R-1 code means the refrigerator has detected a fault in the ice maker temperature sensor circuit. The problem can be a separated sensor housing, a loose or corroded connector, a broken wire, or a short circuit within the sensor itself. The control board monitors the voltage signal from this sensor on main PCB connector CN90 pin 4, and triggers the code when that voltage falls outside the expected range of 1.0V to 4.5V. Ice production will typically stop until the fault is resolved.

The R-1 code affects the ice maker sensor circuit specifically, so the main refrigerator and freezer compartments should continue operating normally. However, ice production may stop or behave erratically while the fault is present. It is safe to continue using the refrigerator for food storage, but the issue should be diagnosed and repaired to restore full ice maker function.

If the fix is simply reseating a loose connector, there may be no parts cost at all. An ice maker temperature sensor replacement typically costs between $15 and $60 for the part depending on the model. If the main PCB is at fault, board replacement costs generally range from $100 to $300 or more for the part alone. Adding professional labor, total repair costs can range from $75 to $400 depending on the diagnosis.

Many R-1 errors are caused by loose connectors or a dislodged sensor housing, both of which can be corrected without replacing parts. Start by unplugging the refrigerator, then inspect the sensor connector and housing for proper seating. If the wiring and connectors look intact, a multimeter check of the voltage at CN90 pin 4 to CN1 pin 3 will help determine whether the sensor or main PCB needs replacement.

A reset may temporarily clear the R-1 code from the display, but if the underlying fault in the sensor circuit still exists, the code will return. A reset is useful for confirming whether the error is intermittent or persistent, but it does not repair a faulty sensor, broken wire, or damaged connector. Full resolution requires diagnosing and correcting the root cause.