LG Refrigerator Error Code Ice Room Sensor Error

This error means the temperature sensor located in the ice maker compartment is reporting a value outside the valid range, specifically above 149°F (+65°C) or below -58°F (-50°C). The main PCB interprets these out-of-range readings as a sensor system fault. The underlying cause is usually a failed thermistor, a wiring problem, or a connector issue between the sensor and the control board.

The refrigerator's main cooling section may continue to operate, but the ice maker could behave erratically or stop producing ice entirely while this error is active. There is no immediate safety hazard to food stored in the main compartment, but you should address the fault promptly to prevent ice maker damage and avoid food spoilage if the error affects overall temperature control.

If only the thermistor sensor needs replacement, parts typically range from $15 to $60 depending on the specific model, and the repair is relatively inexpensive if done without a service call. If a technician is needed, labor plus parts can bring the total to roughly $100 to $250. Main PCB replacement is the most costly scenario, with parts and labor potentially ranging from $200 to $500 or more.

A knowledgeable DIYer can perform several checks, including inspecting the wiring harness connectors at CN31 and CN76 for corrosion or loose connections, defrosting the ice compartment to rule out ice damage, and using a multimeter to verify the voltage reading falls between 1.0V and 4.5V. If the wiring checks out and the sensor tests faulty, replacing the thermistor is a moderately straightforward repair. Main PCB replacement should be left to a qualified technician.

A power reset by unplugging the unit for a few minutes may temporarily clear the error display, but the code will return if the underlying fault with the sensor or wiring has not been corrected. A reset is useful for confirming whether the error is intermittent, but it is not a repair. The voltage at CN31 pin 3 and CN76 pin 1 must fall within the 1.0V to 4.5V range before the error will clear permanently.