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Error code reference

Daewoo Air Conditioner Error Code 1 times blink

Room sensor open or short circuit; unit continues working with fixed room temperature of 32°C in cooling mode or 18°C in heating mode.

Daewoo codesDaewoo air conditioner codes
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What the 1 times blink error code actually means

Your Daewoo air conditioner is detecting a problem with the small temperature sensor inside the unit that measures how warm or cool the room is. Because it cannot read the actual room temperature, it is using a fixed guess instead, which means it may not cool or heat your space properly. The unit will keep running, but performance will be off until the sensor or its wiring is repaired.

Diagnostic procedure

The full 1 times blink procedure

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1
First diagnostic step
Check room air thermistor (RATH) for open or short condition.
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Most common causes of 1 times blink

Ranked by how often they cause this code
  1. 1Failed room thermistor (RATH)
  2. 2Disconnected or loose thermistor connector
  3. 3Damaged thermistor wiring harness
  4. 4Corroded thermistor terminals
  5. 5Faulty control board

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Questions people ask about 1 times blink

What does 1 times blink mean on a Daewoo air_conditioner?
A single blink fault code on a Daewoo air conditioner indicates an open or short circuit in the room air thermistor (RATH). This sensor measures ambient room temperature, and when it fails the unit cannot read actual conditions. The system compensates by running on a fixed temperature value: 32 degrees Celsius in cooling mode and 18 degrees Celsius in heating mode.
Is it safe to keep running my Daewoo AC while it shows this error?
The unit will continue to operate in a failsafe mode, so there is no immediate safety hazard. However, because it is running on a fixed temperature assumption rather than real room data, it will not regulate temperature accurately. Extended operation in this mode reduces efficiency and may cause uncomfortable conditions, so the fault should be addressed promptly.
Will resetting the unit clear the 1 times blink error code?
Power cycling the unit may temporarily clear the displayed fault, but if the underlying thermistor problem persists the error will return once the control board re-detects the open or short condition. A reset alone will not repair a failed sensor, broken wire, or damaged connector. The root cause must be corrected for the fault to stay clear.
Can I fix the 1 times blink error myself?
A knowledgeable DIYer can check for a loose or disconnected thermistor connector and reseat it, which may resolve the fault. Testing the thermistor with a multimeter to check for proper resistance is also a straightforward step. Replacing the thermistor sensor itself is a low-complexity repair, but if the control board is the root cause, professional service is recommended.
How much does it cost to repair the 1 times blink error on a Daewoo air conditioner?
If only a connector needs to be reseated, the repair can be done at no parts cost. A replacement room thermistor is generally an inexpensive part, typically in the range of $10 to $40 depending on the model. If the control board requires replacement, costs rise significantly, often ranging from $80 to $250 or more including labor.

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