Daewoo Air Conditioner Error Code CODE1

CODE1 indicates that the indoor unit room temperature sensor has an open circuit or short circuit condition. The control board cannot receive a valid temperature reading from the sensor, so the unit switches to a fixed failsafe mode: 18 degrees Celsius in heating mode or 32 degrees Celsius in cooling mode. The unit continues to run but cannot respond to the actual room temperature until the sensor fault is corrected.

The unit will continue to operate in failsafe mode, so there is no immediate safety hazard in most cases. However, because it runs to a fixed temperature setpoint rather than your actual room conditions, it may overcool or overheat the space and will operate inefficiently. Running it for extended periods in this state can also add unnecessary wear to the compressor. It is best to address the fault promptly.

If only the room temperature sensor needs replacement, parts and labor typically fall in the range of 80 to 200 dollars depending on your location and the technician's rates. If the indoor control board is also at fault, repair costs can rise to the range of 200 to 500 dollars or more. Getting a diagnostic assessment from a qualified technician first is the best way to determine which components actually need to be replaced before committing to a repair cost.

If the cause is simply a loose connector, a homeowner comfortable working around electronics can carefully reseat the sensor plug on the indoor unit after powering the system off. However, if the sensor itself needs to be replaced or the control board is involved, the repair requires disassembling the indoor unit and handling electrical components, which is better suited for a qualified technician. Always disconnect power at the breaker before opening the indoor unit.

A power reset may temporarily clear the error display if the fault was caused by an intermittent connection, but CODE1 will return as soon as the control board detects the sensor signal is still out of range. A reset does not repair the underlying sensor or wiring fault. The error will continue to reappear until the root cause is diagnosed and corrected.