Daewoo Air Conditioner Error Code Room Sensor open/short

This error means the control board has detected that the room temperature thermistor circuit is either broken (open) or has a short circuit condition. The thermistor is used to measure ambient room temperature so the unit can regulate cooling properly. When the fault is active, the unit substitutes a fixed value of 32°C for the room temperature and continues running in cooling mode, though accurate temperature control is no longer possible.

The unit will continue to operate using a fixed assumed room temperature of 32°C, so it will not shut down dangerously. However, because actual room temperature is no longer being measured, the system cannot regulate cooling accurately, and energy efficiency will be reduced. It is advisable to address the fault promptly rather than leaving the unit in this degraded operating mode indefinitely.

If only the sensor itself needs replacement, parts typically range from $15 to $60 depending on the model, and the repair is relatively quick. If a technician is needed for diagnosis and replacement, total costs including labor generally fall in the range of $80 to $200. Control board replacement, if required, is significantly more expensive and could range from $150 to $400 or more.

A knowledgeable DIYer can perform several diagnostic steps, including inspecting the sensor connector for corrosion or loose pins and measuring thermistor resistance with a multimeter. If the sensor wiring or connector is the issue, cleaning the terminals or reseating the connector may resolve it without parts. If the thermistor itself has failed, replacing the sensor is a straightforward repair but requires sourcing the correct replacement part for your specific Daewoo model.

A power reset may temporarily clear the error display, but the fault will return as soon as the control board performs its sensor check if the underlying problem has not been fixed. Persistent reappearance of the error after a reset confirms that the sensor, its wiring, or the connector requires physical inspection and repair.