Samsung Air Conditioner Error Code YEL_FLICKER_GRN_FLICKER

This error code indicates a compressor starting error, meaning the outdoor unit attempted to start the compressor but could not confirm successful startup. The alternating yellow and green LED flicker pattern is the diagnostic signal for this specific fault. The three most common areas to investigate are the compressor TAB terminal connections, the service valve positions, and the EEV motor. The system will not provide cooling or heating until the fault is resolved.

The system will generally not operate while this error is active, since the compressor has failed to start. There is no immediate safety hazard from the error itself, but you should not attempt to force repeated restart cycles, as this can overheat compressor motor windings and cause additional damage. Leave the unit powered off until the root cause is identified and corrected.

A power reset may temporarily clear the error and allow the unit to attempt another startup, but if the underlying fault such as a bad EEV motor, closed service valve, or poor terminal connection is still present, the error will return immediately or after the next startup attempt. Resetting should only be used as a diagnostic step to confirm the fault is active, not as a substitute for identifying and correcting the actual cause.

Some steps are accessible to a knowledgeable DIYer, such as checking that the service valves are fully open and visually inspecting the compressor TAB terminal connections for obvious looseness or corrosion. However, tasks like measuring EEV motor coil resistance, checking compressor winding resistance, or handling refrigerant circuits require proper tools and, in the case of refrigerant work, EPA 608 certification. If the compressor or EEV motor needs replacement, a licensed HVAC technician should perform the repair.

Repair costs vary significantly depending on the root cause. A simple fix like reseating loose terminal connections or opening a service valve may only involve a service call fee, typically in the range of $75 to $150. EEV motor replacement generally costs between $150 and $400 including parts and labor. Compressor replacement is substantially more expensive, often ranging from $800 to $2,000 or more depending on unit size and labor rates.