Daewoo Freezer Error Code DR

The DR code means the freezer's control board has detected that the door was open, or registering as open through the door switch circuit, for more than one continuous hour. The board monitors a signal at connector CN3 pins 5 and 6 on the main PCB, where 5 VDC indicates a closed door and 0 VDC indicates an open door. When that signal stays at 0 VDC for over 60 minutes, the DR alert is triggered. The cause may be a genuinely open door, a faulty door switch, or a wiring issue.

A power reset may temporarily clear the DR code, but it will return if the underlying cause is not resolved. If the door switch is faulty or the door is not sealing properly, the controller will again detect a prolonged open-door condition and re-display the code. Fix the root cause before relying on a reset.

Repair costs vary depending on the cause. Replacing a door switch is typically a lower-cost repair, with parts generally ranging from $15 to $50 and labor costs varying by region. A new door gasket can range from $30 to $80 depending on the model. Main PCB replacement is the most expensive possibility, with parts and labor potentially totaling $150 to $350 or more. Diagnosing the fault at CN3 first can help you avoid unnecessary parts costs.

Start by confirming the door is fully closed and nothing inside is blocking it from seating properly. Then measure the DC voltage at main PCB connector CN3 between pins 5 and 6 with the door closed: you should read 5 VDC. If you read 0 VDC with the door shut, the door switch or its wiring circuit is the likely culprit and should be tested and replaced as needed. Also inspect the door gasket for wear or gaps that could prevent a proper seal.

Yes, if the door has genuinely been open for over an hour, the interior temperature of the freezer may have risen enough to compromise frozen food safety. Check the temperature of your food and discard anything that has fully thawed or shows signs of spoilage. If the code was triggered by a faulty sensor rather than an actual open door, your food may still be safe, but you should verify the interior temperature before assuming it is.