Samsung Refrigerator Error Code Ice Maker(FZ) Sensor

This error means the freezer ice maker temperature sensor is reporting a value outside the acceptable range, either above +149°F (65°C) or below -58°F (-50°C). These readings indicate a problem with the sensor, its wiring, or its connector rather than an actual temperature extreme. Common causes include a disconnected wire, short circuit, sensor housing separation, or a failed sensor. The main PCB monitors this sensor through connector CN90 and triggers the error when the signal voltage falls outside the 1.0V to 4.5V window.

A reset may temporarily clear the error code from the display, but it will return if the underlying fault is still present. The main PCB continuously monitors the sensor voltage, so any disconnection, short, or failed sensor will trigger the error again after a reset. A reset is useful for confirming whether the error is intermittent, but a proper diagnosis of the sensor circuit is necessary to permanently resolve it.

Repair costs depend on the root cause. If the fix is simply reseating a loose connector, there may be no parts cost at all. Replacing the ice maker temperature sensor typically costs between $20 and $60 for the part, plus labor if a technician is involved. A main PCB replacement is the most expensive scenario, with parts ranging from $100 to $300 or more depending on the model, plus labor costs.

Some causes of this error are DIY-friendly. Start by inspecting the sensor wiring harness for obvious disconnections, pinched wires, or loose connectors, and measure voltage at CN90 pins #8 and #9 with a multimeter. If the connector is simply loose or corroded, cleaning and reseating it may resolve the error. Replacing the sensor itself is also a straightforward repair for someone comfortable with basic appliance disassembly, but replacing the main PCB is more complex and may warrant professional service.

The freezer and fresh food compartments will generally continue to cool normally while this error is active, since it is specific to the ice maker sensor circuit. However, the ice maker may stop producing ice or behave erratically until the fault is corrected. It is safe to keep food stored in the refrigerator, but you should address the error promptly to restore full ice maker function.