Daewoo Air Conditioner Error Code continuous blink

A continuous blink on a Daewoo air conditioner signals that the unit has detected a critical fault and stopped operating. The fault can originate from an open or shorted indoor coil sensor, an open or shorted outdoor coil sensor, a compressor or electrical component failure, or a refrigerant gas leak. The unit will not resume normal operation until the underlying cause is identified and corrected.

The continuous blink indicates the unit has already shut itself down as a protective measure, so it will not operate in its faulted state. Attempting to force the unit to run without resolving the underlying fault risks further damage to the compressor or electrical components. Leave the unit off until a proper diagnosis has been performed.

A power reset may temporarily clear the fault and allow the unit to restart, but if the underlying problem is still present, the continuous blink will return once the control board detects the fault condition again. Resetting without repairing the root cause is not a solution and may delay diagnosis while allowing further damage to occur.

Some causes, such as a loose sensor connector or a wiring issue, can be addressed by a knowledgeable DIYer with basic electrical testing tools. However, causes involving the compressor, refrigerant circuit, or internal electrical components require professional service. Refrigerant handling in particular is legally restricted to certified technicians in most regions.

Repair costs vary significantly depending on the root cause. Sensor replacements are generally inexpensive, typically in the range of $50 to $150 for parts and labor. Compressor replacement or refrigerant leak repair with recharge can run considerably higher, often in the $300 to $800 or more range, depending on system size and refrigerant type.