Samsung Air Conditioner Error Code OUTDOOR_GREEN_FLICKER

OUTDOOR_GREEN_FLICKER signals a Communication NG fault, meaning the communication link between the indoor and outdoor units has failed. The outdoor unit's green LED flickers to indicate this condition. The system suspends normal operation until the communication is restored. This fault must be diagnosed and resolved before the air conditioner will run.

The system will not operate normally while this fault is active, so there is no risk of running damaged equipment under load. However, you should not attempt to bypass the fault or force the system on. Leave the unit powered off or in standby mode until the communication fault is properly diagnosed and repaired.

A power reset may temporarily clear the displayed fault, but if the underlying communication problem still exists, the error will return quickly once the system attempts to resume normal operation. A reset is useful as a first step to rule out a temporary glitch, but a persistent OUTDOOR_GREEN_FLICKER code requires physical inspection of the communication cable and control boards to resolve permanently.

Start by inspecting the communication cable connecting the indoor and outdoor units for any damage, pinching, or loose connections at the terminal blocks on both ends. Confirm the wiring is connected to the correct terminals and perform a continuity test on the cable. If the cable is good, a qualified technician should evaluate the control boards in both units for signs of failure.

If the fix is simply reseating or replacing the communication cable, repair costs are generally low, typically in the range of $75 to $200 including labor. If a control board on either the indoor or outdoor unit needs replacement, costs can rise significantly, often ranging from $250 to $600 or more depending on the board and labor rates in your area.