Daewoo Air Conditioner Error Code CODE4

CODE4 indicates a compressor or compressor electrical component fault on a Daewoo air conditioner. The unit enters Emergency mode when this code appears, meaning it continues to operate but has detected an abnormal condition. The fault can originate in the compressor itself, its electrical supply components, refrigerant circuit, or the indoor sensor assembly. A technician should inspect all of these areas to identify the root cause.

The unit continues operating in Emergency mode when CODE4 is active, which provides short-term functionality. However, running the system with an underlying compressor or electrical fault for an extended period can worsen the damage and lead to complete compressor failure. It is advisable to limit use and have the system inspected promptly to avoid a more costly repair.

Resetting the unit may temporarily clear the error display, but it will not resolve the underlying fault. If the compressor, its electrical components, refrigerant level, or sensor assembly have not been repaired, CODE4 will return. A reset should only be performed after the root cause has been diagnosed and corrected to confirm the repair was successful.

Some basic checks, such as inspecting wiring connections and visually looking for obvious damage, can be done without specialized tools. However, diagnosing compressor winding faults, testing capacitors accurately, and checking refrigerant pressures all require proper equipment and training. Refrigerant handling is also regulated and must be performed by a certified technician in most regions. It is recommended to contact a qualified HVAC technician for a full diagnosis.

Repair costs vary significantly depending on the root cause. Replacing a run capacitor typically falls in a lower cost range, while compressor replacement is one of the most expensive repairs, often ranging from several hundred to over a thousand dollars including labor. Refrigerant leak repair and recharge costs depend on the severity of the leak and the amount of refrigerant required. A diagnostic visit from a technician will help determine the specific cost for your situation.