Daewoo Air Conditioner Error Code 4

Error code 4 on a Daewoo air conditioner indicates a fault detected in the indoor fan motor circuit. The problem could originate from the fan motor itself, the motor connector and wiring harness, or the indoor PCB that controls the motor. The unit shuts down to prevent further damage until the fault is resolved.

No, you should not attempt to bypass or continue operating the unit when error code 4 is active. The fault indicates a motor circuit problem that has caused the system to shut itself down as a protective measure. Forcing operation could damage the PCB, overheat wiring, or cause further component failure.

Repair costs vary depending on which component has failed. Reseating a connector or clearing a mechanical obstruction costs little beyond a service call fee, which typically ranges from $60 to $120. Replacing the indoor fan motor generally runs $150 to $400 including parts and labor, while a replacement indoor PCB can range from $200 to $500 or more depending on parts availability and labor rates in your area.

Some basic checks are within reach of a knowledgeable DIYer, such as visually inspecting the motor connector for loose or corroded pins and clearing any debris from the blower wheel. However, testing motor winding resistance, diagnosing PCB faults, and replacing internal components typically require electrical knowledge and proper tools. It is advisable to have a qualified technician handle anything beyond a visual inspection and connector reseating.

A power reset may temporarily clear the code if the fault was caused by a transient electrical event, but it will return if the underlying problem is not corrected. Persistent reappearance of error code 4 after a reset confirms that a physical fault exists in the motor, connector, or PCB and must be diagnosed and repaired.