Daewoo Air Conditioner Error Code LED 3 times blink

The LED 3 times blink code on a Daewoo air conditioner indicates a compressor error or an electrical fault in the compressor circuit. The unit detects this fault during Emergency Mode Operation by checking whether the indoor coil temperature changes by more than plus or minus 2°C within 5 minutes of startup. If the coil temperature stays flat, it confirms the compressor is not moving refrigerant effectively. While the fault is active, the unit locks to a fixed temperature setpoint rather than following your normal settings.

The unit will continue operating in Emergency Mode, maintaining a fixed temperature setpoint, so it is not in an immediate shutdown state. However, running the system with an underlying compressor or electrical fault for an extended period can cause additional component damage. It is best to have the unit inspected promptly rather than relying on Emergency Mode as a long-term solution.

Repair costs vary widely depending on the root cause. Replacing a run capacitor is generally inexpensive, typically in the range of $50 to $150 including labor. Refrigerant recharge and leak repair can range from $150 to $400 or more. Compressor replacement is the most costly scenario, often ranging from $600 to $1,500 or higher depending on unit size and part availability. A diagnostic service call is the first step to getting an accurate estimate.

Some electrical checks, such as inspecting wiring connections or testing a run capacitor, may be within reach of a knowledgeable DIYer with the right tools. However, diagnosing compressor motor windings, identifying refrigerant leaks, and handling refrigerant requires certified technician equipment and licensing. Because this fault points directly to the compressor or its electrical supply, professional diagnosis is strongly recommended.

A power reset may temporarily clear the fault indication, but the error will return if the underlying compressor or electrical problem has not been resolved. Because this code is detected through a timed coil temperature check at startup, the system will re-enter Emergency Mode and resume blinking as soon as it confirms the compressor is not performing correctly.