mypros+
Error code reference

Daewoo Air Conditioner Error Code 2 times blink

Indoor coil sensor open or short, outdoor coil sensor open or short, compressor or electrical parts of…

Daewoo codesDaewoo air conditioner codes

Indoor coil sensor open or short, outdoor coil sensor open or short, compressor or electrical parts of compressor error, or gas leak; unit does not work.

First step from the service manual

Check indoor coil thermistor (IDC TH), outdoor coil thermistor (ODC TH), compressor, and refrigerant charge.

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

MyPros+ Max

Get the full diagnostic procedure for 2 times blink.

  • 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
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What 2 times blink means on a Daewoo air conditioner

The 2 times blink error on a Daewoo air conditioner is a multi-fault signal that covers several related subsystems: the indoor coil thermistor (IDC TH), the outdoor coil thermistor (ODC TH), compressor operation, and refrigerant charge level. When the control board detects an open or short circuit in either thermistor, it loses the ability to read coil temperatures accurately, which prevents safe operation. An open circuit typically indicates a broken wire or failed sensor element, while a short circuit points to damaged insulation or a sensor that has failed to a low-resistance state. Either condition causes the unit to shut down completely and display this blink code.

The compressor fault grouping within this same code covers electrical issues internal to the compressor, including winding failures, starting component problems, or overload conditions. A refrigerant leak is also flagged under this code because low refrigerant charge directly stresses the compressor, causes abnormal coil temperatures, and can trigger the same protective shutdown. The control board groups these faults together because they all result in the unit being unable to maintain proper thermal operation, and the symptom in every case is that the system will not run at all.

Diagnosing this code requires checking both thermistors for correct resistance values and continuity, inspecting wiring harnesses for damage or corrosion, testing compressor windings for opens or shorts to ground, and checking system refrigerant pressure. A technician should verify the IDC TH and ODC TH sensors first since they are the most accessible components and thermistor failures are common after years of thermal cycling. If sensors check out, the investigation moves to compressor electrical condition and refrigerant charge.

Source: manufacturer service documentation.

Common causes of 2 times blink

  1. 01

    Failed indoor or outdoor coil thermistor

    Part replacement

    The IDC TH or ODC TH sensor has developed an open or short circuit due to age, heat exposure, or physical damage. Resistance testing the thermistor with a multimeter will confirm whether it is out of specification.

  2. 02

    Damaged thermistor wiring harness

    Part replacement

    Wires connecting the coil sensors to the control board can crack, corrode, or suffer rodent damage, creating intermittent or permanent open and short conditions. Visual inspection of the harness and continuity testing will identify breaks.

  3. 03

    Low refrigerant charge from a leak

    Part replacement

    A refrigerant leak reduces system pressure, causes abnormal coil temperatures, and stresses the compressor, triggering this fault code. A technician will need to locate the leak, repair it, and recharge the system to the correct specification.

  4. 04

    Compressor electrical fault

    Part replacement

    Internal compressor winding failure or a short to ground within the compressor motor can trigger this code. Testing compressor terminals for correct resistance between windings and absence of shorts to the compressor shell will identify this condition.

  5. 05

    Compressor overload or starting component failure

    Part replacement

    A failed start capacitor or overload protector can prevent the compressor from starting and cause the control board to log a compressor fault within this blink code group. These components can be tested with a capacitance meter or continuity tester.

See the test procedure for each cause

Frequently asked questions about 2 times blink

What does 2 times blink mean on a Daewoo air_conditioner?
The 2 times blink code on a Daewoo air conditioner signals a fault in one of four areas: the indoor coil thermistor, the outdoor coil thermistor, the compressor or its electrical components, or the refrigerant charge level. When any of these conditions are detected, the unit shuts down completely and will not operate. The blinking indicator is the control board's way of communicating that a protective shutdown has occurred and service is required.
Can I fix the 2 times blink error on my Daewoo air conditioner myself?
Some portions of this diagnosis, such as inspecting wiring harnesses and testing thermistor resistance with a multimeter, are within reach of a skilled DIYer. However, if the fault involves a refrigerant leak or compressor failure, those repairs require certified technician equipment and refrigerant handling credentials. Attempting to work with refrigerant without proper certification is illegal in most jurisdictions and can be dangerous.
Is it safe to keep using my Daewoo air conditioner when it shows the 2 times blink error?
No. The unit shuts itself down when this code appears precisely because continued operation would be unsafe or damaging. Running the system with a failed sensor, a compressor fault, or low refrigerant can cause compressor burnout or further refrigerant loss. The unit should remain off until the fault is diagnosed and repaired.
How much does it cost to repair the 2 times blink error on a Daewoo air conditioner?
Repair costs vary significantly depending on the root cause. A thermistor sensor replacement is typically one of the less expensive repairs, often ranging from $75 to $200 including labor. A refrigerant leak repair with recharge can range from $150 to $500 or more depending on the leak location and refrigerant type. Compressor replacement is the most expensive outcome, often ranging from $500 to $1,500 or higher depending on unit size.
Will resetting my Daewoo air conditioner clear the 2 times blink error?
A power reset may temporarily clear the fault display, but the error will return as soon as the control board detects the same problem again. Because this code indicates a real hardware condition such as a failed sensor, compressor issue, or refrigerant loss, the underlying fault must be diagnosed and corrected before the unit will operate reliably. Repeated resets without repair can delay proper service and risk further damage.

Related Daewoo air conditioner codes

All Daewoo air conditioner codes
View all 45 Daewoo air conditioner codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass