Daewoo Freezer Error Code D1

The D1 error code on a Daewoo freezer indicates a problem with the D-Sensor circuit, specifically a disconnection (open circuit) or a short circuit in the sensor wiring. The main PCB monitors the voltage at connector CN5 between PIN 1 and PIN 2 to detect the fault. A reading below 0.5V means a short is present, while a reading above 4.7V means the circuit is open. This prevents the control board from reading accurate temperature data from that sensor zone.

Continued use with a D1 error is not recommended, because the freezer may be unable to accurately regulate the temperature in the affected zone. This could result in food not being kept at a safe freezing temperature, increasing the risk of spoilage. It is best to transfer perishable items to another freezer and address the fault promptly.

Repair costs vary depending on the root cause. Replacing the D-Sensor thermistor is generally one of the lower-cost repairs, with parts typically in the range of $15 to $50 and labor costs adding $75 to $150 depending on the service provider. If the Main PCB requires replacement, costs can rise significantly, often ranging from $150 to $350 or more for parts and labor combined. Getting a diagnostic estimate before authorizing repairs is advisable.

A knowledgeable DIYer can perform basic diagnostics such as inspecting the wiring harness for visible damage, checking the CN5 connector for corrosion or loose pins, and measuring the voltage at PIN 1 and PIN 2 of CN5 with a multimeter. If the sensor wiring is intact and the connector is secure but the voltage is still out of range, replacing the D-Sensor thermistor is often the next step. Working on the Main PCB or tracing internal wiring faults is best left to a qualified appliance technician.

A power reset may temporarily clear the D1 error from the display, but the code will return as soon as the control board runs its sensor check and detects the same fault condition again. The underlying cause, whether a failed sensor, broken wire, or corroded connector, must be physically repaired or the faulty component replaced before the error will stay cleared.