Daewoo Air Conditioner Error Code 2

Error code 2 on a Daewoo air conditioner indicates an open or short circuit fault in the indoor coil thermistor circuit. The unit monitors the evaporator temperature sensor continuously, and when the resistance reading falls outside the expected range, the system triggers this code and stops normal operation. The fault can be in the sensor itself, the connecting wiring, the connector, or the solder joints on the control PCB.

It is not recommended to continue running the unit while error code 2 is active. The indoor coil thermistor provides essential data for preventing the evaporator from freezing and for protecting the compressor. Operating without a reliable temperature signal can lead to coil icing, reduced cooling performance, or compressor damage over time.

A power reset may temporarily clear the error display, but the code will return if the underlying fault in the thermistor circuit has not been resolved. Resetting without addressing the root cause can also make intermittent faults harder to diagnose. The connector, wiring, and thermistor resistance should be inspected and confirmed within spec before relying on the unit for normal operation.

Some causes of error code 2 are accessible to a knowledgeable DIYer, such as reseating a loose thermistor connector or inspecting visible wiring for damage. However, testing thermistor resistance accurately requires a multimeter and knowledge of the expected resistance values. PCB solder joint repair and thermistor replacement are best handled by a technician if you are not comfortable with electronics work.

Repair costs vary depending on the root cause. If only the thermistor needs replacement, parts typically range from around $10 to $40, plus labor if a technician is involved. If the control PCB requires solder repair or replacement, costs can range from $50 to $200 or more depending on the board and service rates in your area.