Samsung Air Conditioner Error Code YEL_ON_RED_FLICKER_GRN_FLICKER

The YEL_ON_RED_FLICKER_GRN_FLICKER error code on a Samsung air conditioner indicates an OPTION error tied to the EEPROM (Electrically Erasable Programmable Read-Only Memory) on the outdoor control board. The EEPROM is a small non-volatile memory chip that stores critical configuration data for the unit, including model-specific operating parameters, capacity settings, and option codes. When the outdoor control board cannot properly read, write, or verify the data stored in this chip, the system flags an OPTION error and displays this LED indicator pattern: yellow LED on, red LED flickering, and green LED flickering.

The outdoor control board is the primary suspect in this fault condition. The EEPROM may have become corrupted due to a power surge, voltage irregularity, or component aging. In some cases, the EEPROM chip itself fails and loses its programmed data entirely, leaving the control board unable to identify the unit's configuration. This can also occur if the control board was replaced with an incorrectly programmed or incompatible board that carries mismatched option data.

Because the EEPROM data governs how the unit operates, an OPTION error can prevent the system from running at all or cause erratic behavior. Diagnosing this fault typically begins with a thorough inspection of the outdoor control board for visible damage such as burned components, corrosion, or swollen capacitors. If no physical damage is found, replacing the outdoor control board is the standard corrective action, as reprogramming or re-flashing the EEPROM is not a field-serviceable procedure on most Samsung outdoor units.