LG Refrigerator Error Code Comp Tx Error

Comp Tx Error means the refrigerator has detected a communication failure between the compressor drive PCB (inverter board) and the main control board's MICOM. These two boards must exchange signals continuously to control compressor operation. When communication breaks down, the refrigerator logs this error and the compressor may stop running, which can cause the unit to lose cooling.

A power reset will clear the error if it was caused by a temporary power or signal disruption. Unplug the unit, wait a few minutes, then restore power and check whether the condenser fan and compressor are running normally. If the error code returns after the reset, the underlying hardware fault has not been resolved and further diagnosis is required.

Repair costs vary depending on which component has failed. If the fault requires replacing the compressor drive inverter board or the main control board, parts alone typically range from around $80 to $250 or more depending on the specific model, with labor adding to that total. A diagnostic visit from a technician to confirm which board has failed is usually recommended before purchasing parts.

The first step is a power reset, which you can do yourself by unplugging the refrigerator for several minutes and restoring power. If the C-Fan and compressor resume normal operation and the error does not return, no further action is needed. If the error persists after the reset, the fault likely involves a failed PCB or wiring, and a technician with the proper diagnostic tools and replacement parts will be needed.

When this error is active, the compressor may not be running, which means the refrigerator is not cooling effectively. Food safety can become a concern relatively quickly depending on how long the compressor has been off. It is best to check internal temperatures, transfer perishables if needed, and address the fault promptly rather than continuing to use the appliance in this condition.