Samsung Air Conditioner Error Code YEL_FLICKER_RED_FLICKER

This error code indicates a CT sensor error in the outdoor unit. The CT (current transformer) sensor monitors the electrical current draw of the outdoor system components. When this sensor fails or produces an out-of-range signal, the system halts operation and displays this fault through the yellow and red LED flicker pattern on the outdoor unit.

You should not attempt to bypass or ignore this error. The CT sensor monitors current to protect the compressor and outdoor components from electrical faults. Operating the unit without a functioning CT sensor removes an important protective function and could result in compressor damage or further electrical issues.

A power reset may temporarily clear the error code, but if the CT sensor or outdoor control board has actually failed, the code will return once the unit attempts to operate. Resetting without addressing the root cause does not resolve the underlying hardware fault and may delay proper repair.

Some basic checks, such as inspecting wiring connections and terminals in the outdoor unit for looseness or corrosion, can be done by a knowledgeable DIYer. However, if those checks do not resolve the issue, the repair requires replacing the outdoor control board, which involves working with high-voltage electrical components. This work is best handled by a qualified HVAC technician.

Repair costs typically depend on whether the fix requires an outdoor control board replacement or just a wiring correction. Board replacement parts alone can range from roughly $150 to $400 or more depending on the specific Samsung model, with labor adding additional cost. Getting a diagnosis from a certified technician will provide a more accurate estimate for your specific unit.