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Error code reference

Daewoo Air Conditioner Error Code Continuous ON lamp blink

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

Daewoo codesDaewoo air conditioner codes
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What the Continuous ON lamp blink error code actually means

Your Daewoo air conditioner's ON lamp is blinking continuously because the temperature sensor inside the unit has stopped working correctly. The unit is still running, but it's guessing the room temperature instead of measuring it, which means it won't cool your space accurately. A technician will need to check or replace that small sensor to get everything working properly again.

Diagnostic procedure

The full Continuous ON lamp blink procedure

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1
Confirm the fault
Power cycle the unit: switch off the breaker for 60 seconds, then restore power. If the code returns, the fault is persistent and the procedure below isolates the cause.
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Most common causes of Continuous ON lamp blink

Ranked by how often they cause this code
  1. 1Failed room temperature thermistor
  2. 2Disconnected or loose sensor connector
  3. 3Damaged sensor wiring
  4. 4Moisture or corrosion at the sensor connector
  5. 5Faulty control board sensor input circuit

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Questions people ask about Continuous ON lamp blink

What does Continuous ON lamp blink mean on a Daewoo air_conditioner?
The continuous ON lamp blink indicates that the room temperature sensor has been detected as either open circuit or short circuit by the control board. The unit enters a failsafe mode and continues to operate with the room temperature fixed at 32°C in cooling mode rather than shutting down completely. This means cooling performance will be inaccurate until the sensor fault is corrected. A technician should inspect and test the sensor and its wiring to diagnose the root cause.
Will resetting my Daewoo air conditioner clear the continuous ON lamp blink?
A power reset may temporarily clear the fault indication, but if the room temperature sensor is genuinely open or shorted, the fault will return quickly once the control board attempts to read the sensor again. A reset alone does not fix the underlying hardware problem. The sensor, connector, and wiring need to be physically inspected and tested to resolve the fault permanently.
Is the continuous ON lamp blink fault on my Daewoo air conditioner a safety risk?
A failed room sensor is not a direct safety hazard, as the unit is designed to continue operating in failsafe mode rather than behaving unpredictably. However, operating the unit long-term without accurate temperature feedback can lead to excessive cooling and increased energy use. It is best to have the fault diagnosed and repaired promptly to restore normal, efficient operation.
Can I still use my Daewoo air conditioner while the ON lamp is blinking continuously?
The unit will continue running in its failsafe mode, assuming a fixed room temperature of 32°C, so it is not immediately dangerous to operate. However, because it cannot read actual room temperature, it will not cycle correctly and may overcool or run inefficiently. Extended operation in this condition is not recommended, as it can increase energy consumption and may mask further developing issues.
How much does it cost to fix the continuous ON lamp blink fault on a Daewoo air conditioner?
Repair costs vary depending on whether the issue is a simple connector reseating or a full sensor replacement. A replacement room temperature thermistor typically costs between $10 and $40 for the part. Adding professional labor for diagnosis and replacement, total repair costs generally range from $75 to $200 depending on your location and the technician's rates.

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