Samsung Refrigerator Error Code R-1 segment f

The R-1 segment f error code indicates a failure in the CoolSelect Zone temperature sensor (CSZ sensor) on Samsung T, E, and W model refrigerators. This sensor monitors the temperature inside the CoolSelect Zone compartment and reports it to the main control board. When the sensor circuit voltage at main PCB connector CN31 falls outside the 0.5V to 4.5V operating range, the board triggers this fault code. The error means the refrigerator cannot accurately regulate that compartment's temperature until the issue is corrected.

The R-1 segment f error specifically affects the CoolSelect Zone compartment's temperature regulation. The main fresh food and freezer sections may continue to operate normally, but you should not rely on the CoolSelect Zone to maintain accurate temperatures while the fault is active. Avoid storing temperature-sensitive items like raw meat or dairy in that compartment until the repair is completed.

A power reset may temporarily clear the error code from the display, but it will return as soon as the control board re-checks the CSZ sensor circuit and detects the fault again. Because this error reflects an actual hardware or wiring problem rather than a software glitch, a reset does not resolve the underlying issue. The sensor circuit must be inspected and the faulty component repaired or replaced to permanently clear the code.

Some causes of this error are approachable for a knowledgeable DIYer. You can start by checking for ice buildup around the CoolSelect Zone sensor, inspecting the wiring harness for visible damage, and reseating the connector at CN31 on the main PCB. However, accurately diagnosing whether the sensor, wiring, or main board is at fault requires a multimeter and the ability to safely measure voltage at the CN31 connector, which may be better suited for a qualified appliance technician.

Repair costs depend on the root cause. A replacement CoolSelect Zone thermistor typically ranges from $15 to $50 for the part. If the main PCB needs replacement, parts alone can run from $100 to $300 or more. Adding professional labor, total repair costs generally fall between $100 and $400 depending on the diagnosis and your location.