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Daewoo Air Conditioner Error Code continuous blink

Unit does not work due to indoor coil sensor open/short, outdoor coil sensor open/short, compressor or…

Daewoo codesDaewoo air conditioner codes

Unit does not work due to indoor coil sensor open/short, outdoor coil sensor open/short, compressor or electrical parts error, or gas leak.

First step from the service manual

Check sensor circuits and compressor operation.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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What continuous blink means on a Daewoo air conditioner

A continuous blink condition on a Daewoo air conditioner indicates a system-level fault that has caused the unit to shut down entirely. This fault pattern covers several distinct failure categories: open or shorted indoor coil sensor circuits, open or shorted outdoor coil sensor circuits, compressor or electrical component failures, and refrigerant gas leaks. The control board monitors these systems continuously, and when any one of them reports an out-of-range condition, the unit halts operation and signals the fault through the continuous blink pattern on the indoor unit display or indicator LED.

The sensor-related causes typically involve the thermistor circuits monitoring the evaporator (indoor coil) and condenser (outdoor coil) temperatures. An open circuit means the sensor has lost continuity, while a short means the resistance has dropped near zero. Either condition feeds the control board an impossible temperature reading, triggering the lockout. The compressor and electrical parts category covers a broader set of failures including compressor start relay faults, capacitor degradation, or overcurrent conditions in the power circuit.

A refrigerant gas leak is the most operationally serious of the listed causes. When refrigerant charge falls below an acceptable threshold, the system cannot maintain normal operating pressures. This stresses the compressor and can result in abnormal sensor readings across both coil circuits simultaneously. Diagnostic work should begin by checking sensor resistance values and continuity in both coil sensor circuits, then verifying compressor operation and system pressures if sensors test normal.

Source: manufacturer service documentation.

Common causes of continuous blink

  1. 01

    Indoor or outdoor coil sensor failure

    Part replacement

    The thermistors monitoring the evaporator or condenser coil temperatures can fail open or short, sending an invalid signal to the control board. Check sensor resistance against the rated specification and inspect wiring harness connectors for corrosion or damage.

  2. 02

    Refrigerant gas leak

    Part replacement

    Low refrigerant charge from a leak causes abnormal operating pressures and can trigger multiple sensor and compressor fault conditions simultaneously. A technician will need to pressure-test the refrigerant circuit and locate the leak point before recharging.

  3. 03

    Compressor fault

    Part replacement

    The compressor may fail to start or may draw excessive current due to internal mechanical failure, worn windings, or a failed start capacitor. Checking compressor winding resistance and capacitor condition are the first electrical steps in this diagnosis.

  4. 04

    Electrical component failure

    Part replacement

    Relays, capacitors, or other control circuit components can degrade and cause the unit to enter a protective lockout. Visual inspection for burned components and voltage testing at key circuit points can help isolate the fault.

  5. 05

    Wiring harness open or short circuit

    Wiring / connection

    Damaged or corroded wiring between the sensors and the control board can mimic a sensor failure without the sensor itself being faulty. Continuity testing of each wire in the sensor harness can confirm or rule out this cause.

See the test procedure for each cause

Frequently asked questions about continuous blink

What does continuous blink mean on a Daewoo air_conditioner?
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.
Can I fix a Daewoo air conditioner continuous blink error myself?
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.
Is it safe to keep running my Daewoo air conditioner when it shows a continuous blink?
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.
How much does it cost to repair a Daewoo air conditioner continuous blink error?
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.
Will resetting my Daewoo air conditioner clear the continuous blink error?
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.

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