LG Refrigerator Error Code Communication error

This error indicates that the main MICOM and the linear drive MICOM have lost communication with each other. As a result, the compressor shuts off and the damper closes to prevent uncontrolled operation. The refrigerator will stop cooling until the communication fault is identified and resolved. Diagnosis starts with checking the voltage at IC1 PIN60 and IC201 PIN18, where normal operation shows a fluctuating 1 to 4V signal.

A power reset may temporarily clear the error display, but if the underlying wiring or board fault still exists, the code will return as soon as the two controllers attempt to resume communication. A reset is useful as a first step to rule out a temporary glitch, but it is not a reliable fix for an actual hardware fault in the communication circuit.

Repair costs vary depending on the root cause. If only a wiring harness or connector needs replacement, parts and labor costs are typically in the range of $100 to $250. If one of the control boards (main MICOM or linear drive MICOM) has failed, parts alone can range from $150 to $400 or more depending on availability, with additional labor costs on top. Getting a diagnostic assessment from a technician before committing to a repair is advisable.

A knowledgeable DIYer can start by inspecting the wiring harness and connectors between the two control boards for visible damage, loose connections, or corrosion. However, accurately diagnosing whether the main MICOM or the linear drive MICOM has failed requires a multimeter and the ability to safely access the control boards. If the wiring checks out and board-level faults are suspected, a qualified technician is recommended for replacement.

When this error is active, the compressor is off and the unit is not cooling. Continuing to store perishable food in the refrigerator while the error persists risks spoilage. The refrigerator should be serviced promptly, and perishables should be moved to a backup unit or cooler until the fault is resolved.