Samsung Air Conditioner Error Code RED_FLICKER_GRN_ON

This error code indicates a DC-link overvoltage fault detected in the inverter circuit of the outdoor unit. The system measured a voltage level on the internal DC bus that exceeded the safe operating limit and shut down to protect the power electronics. The outdoor control board is the starting point for diagnosis. A qualified technician should inspect the board, supply voltage, and DC-link capacitors to identify the root cause.

No. The system has already shut itself down as a protective measure, so continued operation is not possible until the fault is cleared. Attempting to force the unit to run while an overvoltage condition exists could permanently damage the inverter module, compressor, or control board. The unit should remain off until a technician has diagnosed and corrected the underlying cause.

Repair costs vary depending on what component has failed. A service call and diagnostic fee typically runs between $75 and $150. If only the supply voltage needs correction, additional parts costs may be minimal. Replacing the outdoor control board generally adds $200 to $600 in parts depending on the model, while an inverter module replacement can add $150 to $500 or more. Total repair costs including labor commonly fall in the range of $300 to $900 for component failures.

This fault involves high-voltage DC circuits inside the outdoor unit that retain dangerous charge even after power is disconnected. DIY repair is not recommended unless you have training in inverter drive servicing and appropriate safety equipment. A homeowner can safely check that the outdoor unit's power supply voltage is within normal range at the breaker, but internal component testing and replacement should be handled by a licensed technician.

A power reset may temporarily clear the fault code and allow the unit to restart, but if the underlying cause is still present the error will return, often quickly. Resetting without diagnosis does not fix the root problem. If the fault reappears after a reset, the DC-link voltage condition is persistent and requires component-level inspection of the outdoor control board, supply voltage, and capacitors.