Samsung Air Conditioner Error Code YEL_ON_RED_ON_GRN_ON

This code indicates an overcurrent protection fault, meaning the system detected electrical current levels exceeding safe operating limits and shut down to prevent damage. The yellow, red, and green LEDs all illuminate simultaneously to signal this specific condition. The fault can originate from the compressor, fan motor, refrigerant circuit, or restricted ventilation around the outdoor unit.

No. The overcurrent protection circuit has shut the unit down specifically to prevent electrical and mechanical damage. Attempting to force the unit to operate while this fault is active risks damaging the compressor or fan motor, which are among the most expensive components in the system. The unit should remain off until the fault is diagnosed and corrected.

Repair costs vary widely depending on the root cause. Clearing a ventilation restriction involves no parts cost and minimal labor. Refrigerant recharge services typically range from $150 to $400 depending on refrigerant type and system size. Fan motor replacement generally falls in the $200 to $600 range including labor, while compressor replacement is the most expensive scenario, commonly ranging from $800 to $2,000 or more depending on unit capacity and labor rates.

Some causes, such as clearing debris from around the outdoor unit or ensuring adequate ventilation clearance, can be addressed without professional help. However, diagnosing refrigerant charge issues, compressor health, and motor electrical faults requires specialized tools and training. If clearing airflow restrictions does not resolve the fault, a licensed HVAC technician should perform the full diagnostic.

A power reset may temporarily clear the fault and allow the unit to restart, but if the underlying cause has not been resolved, the overcurrent condition will return and the protection circuit will shut the unit down again. Repeatedly resetting the unit without addressing the root cause can lead to further component damage. A reset is useful only as part of a diagnostic process, not as a fix.