LG Refrigerator Error Code iD

The iD code indicates a problem with the Ice Room (IR) sensor, a thermistor that monitors temperature inside the ice maker compartment. If the display also shows 'Lo', the sensor circuit is open or disconnected. If it shows 'Hi', the sensor is shorted. In both cases, the ice maker may not function correctly until the fault is resolved.

The iD code specifically affects the ice room sensor and ice maker operation, so your main refrigerator and freezer compartments may continue cooling normally. However, running the appliance with a faulty sensor means the ice maker is operating without proper temperature feedback, which can lead to poor ice production or no ice at all. It is best to address the fault promptly to avoid potential secondary issues.

A power reset may temporarily clear the iD code from the display, but it will return if the underlying sensor fault is still present. The code is triggered by an actual electrical condition, either an open or shorted sensor circuit, so the fault must be diagnosed and repaired for the code to stay off. Resetting without repairing does not fix the ice maker.

A knowledgeable DIYer can perform the initial diagnostic step by locating CN15 on the Main PCB and measuring resistance across both terminals with a multimeter after disconnecting the harness. If the sensor tests as open or shorted, replacing the IR sensor on the evaporator is the recommended repair. Working inside the refrigerator near the evaporator does require removing interior panels, so comfort with appliance disassembly is helpful.

If only the IR sensor needs replacement, parts typically range from $15 to $60 depending on the specific model. If a technician performs the repair, labor costs can bring the total to $100 to $250 or more. A Main PCB replacement, if required, is a more expensive repair and could range from $200 to $500 or higher including labor.