Daewoo Refrigerator Error Code E1

The E1 code on a Daewoo refrigerator indicates that the defrost temperature sensor (D-sensor) circuit is open. The control board cannot detect a valid signal from the sensor, which prevents proper management of the defrost cycle. This can lead to frost buildup on the evaporator and reduced cooling if left unresolved.

Continuing to use the refrigerator with an active E1 fault is not recommended for extended periods. Without a functioning defrost sensor, the defrost cycle cannot terminate correctly, which will cause ice to accumulate on the evaporator coil. Over time this leads to restricted airflow, poor cooling performance, and added strain on the compressor.

Resetting the refrigerator may temporarily clear the E1 display, but the code will return if the underlying fault is not repaired. The micom continuously monitors the defrost sensor circuit and will re-trigger E1 as soon as it detects the open circuit condition again. A reset is useful for confirming the fault is active but is not a substitute for diagnosing and fixing the sensor, wiring, or PCB components.

Some steps are accessible to a careful DIYer, such as checking that the C3 connector on the main PCB is fully seated and free of corrosion. However, testing diodes D03 and D05, measuring voltage at the micom port 4, and replacing the defrost sensor or PCB components require a multimeter and basic electronics knowledge. If you are not comfortable working around refrigerator electronics and wiring, a qualified technician should perform the repair.

Repair costs depend on the failed component. A defrost temperature sensor typically costs between $10 and $40 for the part. If the main PCB requires diode-level repair or full board replacement, costs can range from $50 to $200 or more for parts alone. Adding professional labor, total repair costs generally fall between $75 and $300 depending on the diagnosis.